技术领域technical field
本发明涉及输配电设备领域，尤其涉及一种三相功耗不平衡调节装置及其控制方法、发电机组。The invention relates to the field of power transmission and distribution equipment, in particular to a three-phase power consumption unbalance adjustment device, a control method thereof, and a generator set.
背景技术Background technique
当发电机脱离市政电网独自向与该发电机相连接的设备提供电力时，例如，发电机向停电的楼宇或者商场中的电力设备供电时，该发电机处于孤岛运行的状态。When the generator is separated from the municipal power grid to independently provide power to the equipment connected to the generator, for example, when the generator supplies power to power equipment in a building or shopping mall that has a power failure, the generator is in an island operation state.
通常上述电力设备例如电脑、电视机等都采用单相用电，因此一部分设备，例如如图1所示的负载一连接发电机的A相、一部分设备，例如负载二连接B相，而另一部分设备，例如负载三连接C相。在此情况下，当连接不同相负载的启停状态不一致时，将导致发电机10的三相电流、电压幅值不一致，即导致发电机10出现三相不平衡现象。这样一来，当发电机10在三相不平衡情况下运转时，会使得发电机10的逆扭矩增加，从而产生严重的震动和发热，导致转轴损坏。此外，在三相不平衡严重的情况下，发电机10会触发不平衡保护动作，从而进行停机保护，导致不能正常供电。Usually the above-mentioned power equipment such as computers and televisions use single-phase electricity, so part of the equipment, such as the load one shown in Figure 1, is connected to the A phase of the generator, and some equipment, such as the load two, is connected to the B phase, and the other part Equipment, such as loads, are connected to phase C three times. In this case, when the start-stop states of loads connected to different phases are inconsistent, the three-phase current and voltage amplitudes of the generator 10 will be inconsistent, that is, the three-phase unbalance phenomenon of the generator 10 will occur. In this way, when the generator 10 operates under the condition of three-phase unbalance, the reverse torque of the generator 10 will increase, thereby generating severe vibration and heat, and causing damage to the rotating shaft. In addition, in the case of severe three-phase unbalance, the generator 10 will trigger an unbalance protection action, thereby performing shutdown protection, resulting in failure to supply power normally.
现有技术中，为了解决上述问题会通过在发电机10功耗较小的一相或两相上增设电阻，以通过电阻消耗电能提升该相的功耗，从而达到三相功率平衡的目的。但是这样一来，当三相功率不平衡差异越大时，需要增加的电阻数量就会越多，被消耗的功耗越大，从而导致资源浪费。In the prior art, in order to solve the above problems, resistors are added to one or two phases of the generator 10 with lower power consumption, so as to increase the power consumption of the phases by consuming electric energy through the resistors, so as to achieve the purpose of three-phase power balance. But in this way, when the difference of three-phase power imbalance is greater, the number of resistors to be added will be more, and the power consumption will be greater, resulting in waste of resources.
发明内容Contents of the invention
本发明的实施例提供一种三相功耗不平衡调节装置及其控制方法、发电机组，能够避免采用增设电阻解决三相不平衡，导致大量电能被消耗的问题。Embodiments of the present invention provide a three-phase power consumption unbalance adjustment device and its control method, and a generator set, which can avoid the problem of using additional resistors to solve the three-phase unbalance, resulting in the consumption of a large amount of electric energy.
为达到上述目的，本发明的实施例采用如下技术方案：In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:
本发明实施例的一方面，提供一种三相功耗不平衡调节装置，通过三相输配线路与发电机相连接，所述三相功耗不平衡调节装置包括第一相整流模块、第二相整流模块、第三相整流模块、第一相逆变模块、第二相逆变模块、第三相逆变模块、直流母线以及控制器；所述第一相整流模块、所述第二相整流模块以及第三相整流模块分别与所述三相输配线路的三相一一对应；所述第一相整流模块与所述三相输配线路中与所述第一相整流模块相对应的相以及所述直流母线相连接，以构成第一相整流回路；所述第二相整流模块与所述三相输配线路与所述第二相整流模块相对应的相以及所述直流母线相连接，以构成第二相整流回路；所述第三相整流模块与所述三相输配线路与所述第三相整流模块相对应的相以及所述直流母线相连接，以构成第三相整流回路；所述第一相逆变模块、所述第二相逆变模块以及所述第三相逆变模块分别与所述三相输配线路的三相一一对应；所述第一逆变模块与所述三相输配线路中与所述第一逆变模块相对应的相以及所述直流母线相连接，以构成第一相逆变回路；所述第二逆变模块与所述三相输配线路中与所述第二逆变模块相对应的相以及所述直流母线相连接，以构成第二相逆变回路；所述第三逆变模块与所述三相输配线路中与所述第三逆变模块相对应的相以及所述直流母线相连接，以构成第三相逆变回路；所述控制器分别与所述第一相整流模块、所述第二相整流模块、所述第三相整流模块、所述第一相逆变模块、所述第二相逆变模块以及所述第三相逆变模块相连接，所述控制器用于根据控制器指令分别对所述第一相整流模块、所述第二相整流模块、所述第三相整流模块、所述第一相逆变模块、所述第二相逆变模块或所述第三相逆变模块的启闭进行控制。In one aspect of the embodiments of the present invention, a three-phase power consumption unbalance adjustment device is provided, which is connected to a generator through a three-phase transmission and distribution line. The three-phase power consumption unbalance adjustment device includes a first-phase rectification module, a second A two-phase rectifier module, a third-phase rectifier module, a first-phase inverter module, a second-phase inverter module, a third-phase inverter module, a DC bus and a controller; the first-phase rectifier module, the second The phase rectification module and the third phase rectification module correspond to the three phases of the three-phase transmission and distribution line respectively; The corresponding phase and the DC bus are connected to form a first-phase rectification circuit; the phase of the second-phase rectification module and the three-phase transmission and distribution line corresponding to the second-phase rectification module and the DC The busbars are connected to form a second-phase rectification circuit; the third-phase rectifier module is connected to the phase of the three-phase transmission and distribution line corresponding to the third-phase rectifier module and the DC busbar to form a second-phase rectification circuit. A three-phase rectifier circuit; the first phase inverter module, the second phase inverter module and the third phase inverter module correspond to the three phases of the three-phase transmission and distribution line; An inverter module is connected to the phase corresponding to the first inverter module in the three-phase transmission and distribution line and the DC bus to form a first phase inverter circuit; the second inverter module is connected to the The phase corresponding to the second inverter module in the three-phase transmission and distribution line is connected to the DC bus to form a second-phase inverter circuit; the third inverter module is connected to the three-phase inverter module The phase corresponding to the third inverter module in the distribution line is connected to the DC bus to form a third phase inverter circuit; the controller is connected to the first phase rectifier module and the second phase rectifier module respectively. The phase rectification module, the third phase rectification module, the first phase inverter module, the second phase inverter module and the third phase inverter module are connected, and the controller is used to respectively for the first phase rectification module, the second phase rectification module, the third phase rectification module, the first phase inverter module, the second phase inverter module or the third phase inverter The opening and closing of the variable module is controlled.
优选的，所述第一相整流模块、所述第二相整流模块以及所述第三相整流模块中的任意一个整流模块包括整流器以及与所述整流器相连接的稳压器；所述整流器与所述三相输配线路中与该整流器相对应的相相连接，所述稳压器与所述直流母线相连接。Preferably, any one of the first-phase rectification module, the second-phase rectification module, and the third-phase rectification module includes a rectifier and a voltage regulator connected to the rectifier; the rectifier and The phase corresponding to the rectifier in the three-phase transmission and distribution line is connected, and the voltage stabilizer is connected to the DC bus.
优选的，所述第一相逆变模块、第二相逆变模块、第三相逆变模块中的任意一个逆变模块包括逆变器。Preferably, any one of the first-phase inverter module, the second-phase inverter module, and the third-phase inverter module includes an inverter.
优选的，还包括与所述控制器，以及发电机的各相相连接的功率采集器，用于对所述发电机的各相输出功率分别进行采集，并将采集结果输出至所述控制器。Preferably, it also includes a power collector connected to the controller and each phase of the generator, used to collect the output power of each phase of the generator respectively, and output the collected results to the controller .
优选的，所述控制器包括处理模块、指令生成模块以及指令执行模块；所述处理模块与所述功率采集器相连接，用于根据所述功率采集器的采集结果以及所述发电机输出总功率，计算所述发电机的每相平衡所需的功率补偿值；所述指令生成模块用于根据各个所述功率补偿值生成所述控制指令；所述指令执行模块连接所述指令生成模块，用于根据所述控制指令，控制第一相整流模块、所述第二相整流模块、所述第三相整流模块、所述第一相逆变模块、所述第二相逆变模块以及所述第三相逆变模块的导通角和触发延时角，平衡所述发电机的各相负载。Preferably, the controller includes a processing module, an instruction generation module, and an instruction execution module; the processing module is connected to the power collector, and is used to Power, to calculate the power compensation value required for each phase balance of the generator; the instruction generation module is used to generate the control instruction according to each of the power compensation values; the instruction execution module is connected to the instruction generation module, used to control the first phase rectification module, the second phase rectification module, the third phase rectification module, the first phase inverter module, the second phase inverter module and the The conduction angle and trigger delay angle of the third-phase inverter module are used to balance the loads of each phase of the generator.
本发明实施例的另一方面，提供一种发电机组，包括如上所述的任意一项三相功耗不平衡调节装置以及发电机。Another aspect of the embodiments of the present invention provides a generator set, including any one of the above-mentioned three-phase power consumption unbalance adjustment devices and a generator.
优选的，还包括与所述发电机和所述三相功耗不平衡调节装置相连接的启动器，所述启动器用于对所述发电机的三相不平衡度进行检测，当检测结果大于预设阈值时，所述启动器控制所述三相功耗不平衡调节装置开启。Preferably, it also includes a starter connected to the generator and the three-phase power consumption unbalance adjustment device, the starter is used to detect the three-phase unbalance degree of the generator, when the detection result is greater than When the threshold is preset, the starter controls the three-phase power consumption unbalance adjustment device to be turned on.
本发明实施例的又一方面，提供一种三相功耗不平衡调节装置的控制方法，包括：控制器根据控制器指令，将所述第一相整流模块、所述第二相整流模块、所述第三相整流模块中与发电机输出功率较小的相相连接的一个或两个整流模块开启；处于开启状态的整流模块，通过该整流模块所在的整流回路将发电机中与该整流回路相对应的相电流进行整流，并输出至直流母线；控制器根据控制器指令，将所述第一相逆变模块、所述第二相逆变模块、所述第三相逆变器中与所述发电机输出功率较大的相相连接的一个或两个逆变模块开启；处于开启状态的逆变模块，通过该逆变模块所在的逆变回路将所述直流母线上的直流电流进行逆变，并输出至所述发电机中与该开启的逆变模块相连接的相。Still another aspect of the embodiments of the present invention provides a control method for a three-phase power consumption unbalance adjustment device, including: the controller controls the first-phase rectification module, the second-phase rectification module, One or two rectifier modules in the third-phase rectifier module connected to the phase with a smaller output power of the generator are turned on; the rectifier module in the turned-on state connects the rectifier module in the generator to the rectifier module through the rectifier circuit where the rectifier module is located. The phase current corresponding to the loop is rectified and output to the DC bus; the controller, according to the controller instruction, converts the first phase inverter module, the second phase inverter module, and the third phase inverter One or two inverter modules connected to the phase with a larger output power of the generator are turned on; the inverter module in the turned-on state transfers the DC current on the DC bus through the inverter circuit where the inverter module is located. Inversion is performed and output to the phase of the generator connected to the turned-on inverter module.
优选的，当所述三相功耗不平衡调节装置还包括功率采集器，所述控制器包括处理模块、指令生成模块以及指令执行模块时，所述方法包括：功率采集器对所述发电机的各相输出功率分别进行采集；所述处理模块根据所述功率采集器的采集结果以及所述发电机输出总功率，计算所述发电机的每相平衡所需的功率补偿值；所述指令生成模块根据各个所述功率补偿值生成所述控制指令；所述指令执行模块根据所述控制指令，控制第一相整流模块、所述第二相整流模块、所述第三相整流模块、所述第一相逆变模块、所述第二相逆变模块以及所述第三相逆变模块的导通角和触发延时角，平衡所述发电机的各相负载。Preferably, when the three-phase power consumption imbalance adjustment device further includes a power collector, and the controller includes a processing module, an instruction generation module and an instruction execution module, the method includes: the power collector The output power of each phase is collected separately; the processing module calculates the power compensation value required for each phase balance of the generator according to the collection result of the power collector and the total output power of the generator; the instruction The generation module generates the control instruction according to each of the power compensation values; the instruction execution module controls the first phase rectification module, the second phase rectification module, the third phase rectification module, the The conduction angle and trigger delay angle of the first phase inverter module, the second phase inverter module and the third phase inverter module are used to balance the loads of the generator phases.
本发明实施例提供一种三相功耗不平衡调节装置及其控制方法、发电机组。该三相功耗不平衡调节装置通过三相输配线路与发电机相连接，且该三相功耗不平衡调节装置包括第一相整流模块、第二相整流模块、第三相整流模块、第一相逆变模块、第二相逆变模块、第三相逆变模块、直流母线以及控制器。第一相整流模块、第二相整流模块以及第三相整流模块分别与三相输配线路的三相一一对应。第一相整流模块与三相输配线路中与第一相整流模块相对应的相以及所述直流母线相连接，以构成第一相整流回路；第二相整流模块与三相输配线路与第二相整流模块相对应的相以及直流母线相连接，以构成第二相整流回路；第三相整流模块与三相输配线路与第三相整流模块相对应的相以及直流母线相连接，以构成第三相整流回路。此外，第一相逆变模块、第二相逆变模块以及第三相逆变模块分别与三相输配线路的三相一一对应。第一逆变模块与三相输配线路中与第一逆变模块相对应的相以及直流母线相连接，以构成第一相逆变回路；第二逆变模块与三相输配线路中与第二逆变模块相对应的相以及直流母线相连接，以构成第二相逆变回路；第三逆变模块与三相输配线路中与第三逆变模块相对应的相以及所述直流母线相连接，以构成第三相逆变回路。控制器分别与第一相整流模块、第二相整流模块、第三相整流模块、第一相逆变模块、第二相逆变模块以及第三相逆变模块相连接，控制器用于根据控制器指令分别对第一相整流模块、第二相整流模块、第三相整流模块、第一相逆变模块、第二相逆变模块或第三相逆变模块的启闭进行控制。Embodiments of the present invention provide a three-phase power consumption unbalance adjustment device, a control method thereof, and a generator set. The three-phase power consumption unbalance adjustment device is connected to the generator through a three-phase transmission and distribution line, and the three-phase power consumption unbalance adjustment device includes a first-phase rectification module, a second-phase rectification module, a third-phase rectification module, A first-phase inverter module, a second-phase inverter module, a third-phase inverter module, a DC bus and a controller. The first-phase rectification module, the second-phase rectification module and the third-phase rectification module respectively correspond to the three phases of the three-phase transmission and distribution line. The first-phase rectification module is connected to the phase corresponding to the first-phase rectification module in the three-phase transmission and distribution line and the DC bus to form a first-phase rectification circuit; the second-phase rectification module is connected to the three-phase transmission and distribution line and The phases corresponding to the second-phase rectification module and the DC bus are connected to form the second-phase rectification circuit; the third-phase rectification module is connected to the three-phase transmission and distribution line and the phase corresponding to the third-phase rectification module and the DC bus, To form a third-phase rectifier circuit. In addition, the first-phase inverter module, the second-phase inverter module and the third-phase inverter module correspond to the three phases of the three-phase transmission and distribution line respectively. The first inverter module is connected to the phase corresponding to the first inverter module in the three-phase transmission and distribution line and the DC bus to form a first-phase inverter circuit; the second inverter module is connected to the three-phase transmission and distribution line. The phase corresponding to the second inverter module and the DC bus are connected to form a second phase inverter circuit; the third inverter module is connected to the phase corresponding to the third inverter module in the three-phase transmission and distribution line and the DC The busbars are connected to form a third-phase inverter circuit. The controller is respectively connected with the first phase rectification module, the second phase rectification module, the third phase rectification module, the first phase inverter module, the second phase inverter module and the third phase inverter module, and the controller is used to control The inverter instructions control the opening and closing of the first phase rectification module, the second phase rectification module, the third phase rectification module, the first phase inverter module, the second phase inverter module or the third phase inverter module.
在此情况下，控制器可以根据控制器指令，将第一相整流模块、第二相整流模块、第三相整流模块中与发电机输出功率较小的相相连接的一个或两个整流模块开启，以使得处于开启状态的整流模块，通过该整流模块所在的整流回路将发电机中与该整流模块相连接的一相电流进行整流，并输出至直流母线。此外，控制器根据控制器指令，将第一相逆变模块、第二相逆变模块、第三相逆变器中与发电机输出功率较大的相相连接的一个或两个逆变模块开启，以使得处于开启状态的逆变模块，通过该逆变模块所在的逆变回路将上述直流母线上的直流电流进行逆变，并输出至发电机中与该逆变模块相连接的相。In this case, the controller can, according to the instructions of the controller, connect one or two rectification modules among the first phase rectification module, the second phase rectification module and the third phase rectification module to the phase with the smaller output power of the generator Turn on, so that the rectifier module in the turned-on state rectifies the one-phase current connected to the rectifier module in the generator through the rectifier circuit where the rectifier module is located, and outputs it to the DC bus. In addition, the controller connects one or two inverter modules of the first-phase inverter module, second-phase inverter module, and third-phase inverter to the phase with higher output power of the generator according to the controller's instructions. Turn on, so that the inverter module in the on state inverts the DC current on the above-mentioned DC bus through the inverter circuit where the inverter module is located, and outputs it to the phase connected to the inverter module in the generator.
综上所述，发电机输出功率较小的相通过整流回路进行整流，将一部分电能转移至直流母线，从而提高该相的输出功率。而直流母线上的电能通过逆变回路逆变为交流电流，并输出至与发电机输出功率较大的相相连接的负载，降低了该相的输出电流，从而使得该相的输出功率减小。这样一来，通过上述三相功耗不平衡调节装置，可以使得发电机输出功率少的相向输出功率多的相回馈一定的负向补偿功率，从而达到了三相功率平衡的目的。To sum up, the phase with a smaller output power of the generator is rectified through the rectification circuit, and a part of the electric energy is transferred to the DC bus, thereby increasing the output power of the phase. The electric energy on the DC bus is converted into AC current through the inverter circuit, and output to the load connected to the phase with the higher output power of the generator, which reduces the output current of this phase, thereby reducing the output power of this phase . In this way, through the above-mentioned three-phase power consumption imbalance adjustment device, the phase with less output power of the generator can feed back a certain amount of negative compensation power to the phase with more output power, thereby achieving the purpose of three-phase power balance.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为现有技术提供的一种三相发电机与负载的连接示意图；Fig. 1 is a schematic diagram of a connection between a three-phase generator and a load provided by the prior art;
图2为本发明实施例提供的一种设置有三相功耗不平衡调节装置的发电机组连接结构示意图；Fig. 2 is a schematic diagram of the connection structure of a generator set provided with a three-phase power consumption unbalance adjustment device provided by an embodiment of the present invention;
图3为本发明实施例提供的一种设置有包括功率采集器的三相功耗不平衡调节装置的发电机组的结构示意图；Fig. 3 is a schematic structural diagram of a generator set provided with a three-phase power consumption unbalance adjustment device including a power harvester provided by an embodiment of the present invention;
图4为图3中控制器的具体结构示意图；Fig. 4 is the concrete structural representation of controller in Fig. 3;
图5为图3中各个整流模块和逆变模块的结构示意图；FIG. 5 is a schematic structural diagram of each rectifier module and inverter module in FIG. 3;
图6为本发明实施例提供的一种发电机组的结构示意图；Fig. 6 is a schematic structural diagram of a generator set provided by an embodiment of the present invention;
图7为本发明实施例提供的一种三相功耗不平衡调节装置的控制方法流程图。Fig. 7 is a flow chart of a control method of a three-phase power consumption unbalance adjustment device provided by an embodiment of the present invention.
附图标记：Reference signs:
01-发电机组；10-发电机；20-三相功耗不平衡调节装置；201-第一相整流模块；202-第二相整流模块；203-第三相整流模块；211-第一相逆变模块；212-第二相逆变模块；213-第三相逆变模块；221-直流母线；222-控制器；2221-处理模块；2222-指令生成模块；2223-指令执行模块；230-功率采集器；30-启动器。01-generator set; 10-generator; 20-three-phase power consumption unbalance adjustment device; 201-first phase rectification module; 202-second phase rectification module; 203-third phase rectification module; 211-first phase Inverter module; 212-second phase inverter module; 213-third phase inverter module; 221-DC bus; 222-controller; 2221-processing module; 2222-instruction generation module; 2223-instruction execution module; 230 - power harvester; 30 - starter.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
本发明实施例提供一种三相功耗不平衡调节装置20，如图2所示，通过三相输配线路与发电机10相连接。其中，上述三相输配线路是指，用于将三相发电机的A相、B相以及C相与各种负载相连接的线路。An embodiment of the present invention provides a three-phase power consumption imbalance adjustment device 20, as shown in FIG. 2, which is connected to the generator 10 through a three-phase transmission and distribution line. Wherein, the above-mentioned three-phase transmission and distribution line refers to a line for connecting phase A, phase B, and phase C of a three-phase generator to various loads.
此外，该三相功耗不平衡调节装置20包括第一相整流模块201、第二相整流模块202、第三相整流模块203、第一相逆变模块211、第二相逆变模块212、第三相逆变模块213、直流母线221以及控制器222。In addition, the three-phase power consumption imbalance adjustment device 20 includes a first phase rectification module 201, a second phase rectification module 202, a third phase rectification module 203, a first phase inverter module 211, a second phase inverter module 212, The third phase inverter module 213 , the DC bus 221 and the controller 222 .
其中，第一相整流模块201、第二相整流模块202以及第三相整流模块203分别与三相输配线路的三相一一对应。Wherein, the first-phase rectification module 201 , the second-phase rectification module 202 and the third-phase rectification module 203 respectively correspond to the three phases of the three-phase transmission and distribution line.
基于此，第一相整流模块201与三相输配线路中与该第一相整流模块201相对应的相以及直流母线221相连接，以构成第一相整流回路。例如，第一相整流模块201通过三相输配线路中与该第一相整流模块201相对应的相与发电机的A相和N相相连接。在此情况下，当第一相整流模块201开启时，发电机A相输出的交流电流通过第一相整流模块201所在的第一相整流回路整流为直流电流，并输出至直流母线221上，使得发电机A相输出功率增加。Based on this, the first-phase rectification module 201 is connected to the phase corresponding to the first-phase rectification module 201 and the DC bus 221 in the three-phase transmission and distribution line to form a first-phase rectification circuit. For example, the first phase rectification module 201 is connected to the A phase and the N phase of the generator through the phase corresponding to the first phase rectification module 201 in the three-phase transmission and distribution line. In this case, when the first phase rectification module 201 is turned on, the AC current output by the generator phase A is rectified into a DC current through the first phase rectification circuit where the first phase rectification module 201 is located, and output to the DC bus 221, This increases the output power of phase A of the generator.
此外，第二相整流模块202与三相输配线路中与第二相整流模块202相对应的相以及直流母线221相连接，以构成第二相整流回路。例如，第二相整流模块202通过三相输配线路中与第二相整流模块202相对应的相与发电机的B相和N相相连接。在此情况下，当第二相整流模块202开启时，发电机B相输出的交流电流通过第二相整流模块202所在的第二相整流回路整流为直流电流，并输出至直流母线221上，使得发电机B相输出功率增加。In addition, the second-phase rectification module 202 is connected to the phase corresponding to the second-phase rectification module 202 and the DC bus 221 in the three-phase transmission and distribution line to form a second-phase rectification circuit. For example, the second-phase rectification module 202 is connected to the B-phase and the N-phase of the generator through the phase corresponding to the second-phase rectification module 202 in the three-phase transmission and distribution line. In this case, when the second-phase rectification module 202 is turned on, the AC current output by phase B of the generator is rectified into a DC current through the second-phase rectification circuit where the second-phase rectification module 202 is located, and output to the DC bus 221, Make the generator B-phase output power increase.
此外，第三相整流模块203与三相输配线路与第三相整流模块203相对应的相以及直流母线221相连接，以构成第三相整流回路。例如，第三相整流模块203通过三相输配线路中与第三相整流模块203相对应的相与发电机的C相和N相相连接。在此情况下，当第三相整流模块203开启时，发电机C相输出的交流电流通过第三相整流模块203所在的第三相整流回路整流为直流电流，并输出至直流母线221上，使得发电机C相输出功率增加。In addition, the third-phase rectification module 203 is connected to the phase of the three-phase transmission and distribution line corresponding to the third-phase rectification module 203 and the DC bus 221 to form a third-phase rectification circuit. For example, the third-phase rectification module 203 is connected to the C-phase and N-phase of the generator through the phase corresponding to the third-phase rectification module 203 in the three-phase transmission and distribution line. In this case, when the third-phase rectification module 203 is turned on, the AC current output by phase C of the generator is rectified into a DC current through the third-phase rectification circuit where the third-phase rectification module 203 is located, and output to the DC bus 221, Make the generator C-phase output power increase.
在此基础上，第一相逆变模块211、第二相逆变模块212、第三相逆变模块213与三相输配线路的三相一一对应。On this basis, the first phase inverter module 211 , the second phase inverter module 212 , and the third phase inverter module 213 correspond to the three phases of the three-phase transmission and distribution line one by one.
具体的，第一逆变模块211与三相输配线路中与第一逆变模块211相对应的相以及直流母线211相连接，以构成第一相逆变回路。例如，第一逆变模块211通过三相输配线路中与第一逆变模块211相对应的相与发电机的A相和N相相连接。在此情况下，当第一逆变模块211开启时，直流母线211上的直流电流通过第一逆变模块211所在的第一相逆变回路逆变为交流电流，并通过上述第一逆变模块211输出至与发电机的A相相连的负载，从而降低了发电机10的A相输出的电流，从而使得发电机10的A相输出功率降低。Specifically, the first inverter module 211 is connected to the phase corresponding to the first inverter module 211 and the DC bus 211 in the three-phase transmission and distribution line to form a first phase inverter circuit. For example, the first inverter module 211 is connected to phase A and phase N of the generator through the phase corresponding to the first inverter module 211 in the three-phase transmission and distribution line. In this case, when the first inverter module 211 is turned on, the DC current on the DC bus 211 is converted into an AC current through the first phase inverter circuit where the first inverter module 211 is located, and is passed through the above-mentioned first inverter The module 211 outputs to the load connected to the phase A of the generator, thereby reducing the output current of the phase A of the generator 10 , thereby reducing the output power of the phase A of the generator 10 .
此外，第二逆变模块212与三相输配线路中与第二逆变模块212相对应的相以及直流母线211相连接，以构成第二相逆变回路。例如，第二逆变模块212通过三相输配线路中与第二逆变模块212相对应的相与发电机的B相和N相相连接。在此情况下，当第二逆变模块212开启时，直流母线211上的直流电流通过第二逆变模块212所在的第二相逆变回路逆变为交流电流，并通过上述第二逆变模块212输出与发电机的B相相连的负载，从而降低了发电机10的A相输出的电流，从而使得发电机10的B相输出功率降低。In addition, the second inverter module 212 is connected to the phase corresponding to the second inverter module 212 in the three-phase transmission and distribution line and the DC bus 211 to form a second phase inverter circuit. For example, the second inverter module 212 is connected to the B phase and the N phase of the generator through the phase corresponding to the second inverter module 212 in the three-phase transmission and distribution line. In this case, when the second inverter module 212 is turned on, the DC current on the DC bus 211 is converted into an AC current through the second phase inverter circuit where the second inverter module 212 is located, and is passed through the above-mentioned second inverter The module 212 outputs the load connected to the phase B of the generator, thereby reducing the output current of the phase A of the generator 10 , thereby reducing the output power of the phase B of the generator 10 .
此外，第三逆变模块213与三相输配线路中与第三逆变模块213相对应的相以及直流母线221相连接，以构成第三相逆变回路。例如，第三逆变模块213通过三相输配线路中与第三逆变模块213相对应的相与发电机的C相和N相相连接。在此情况下，当第三逆变模块213开启时，直流母线211上的直流电流通过第三逆变模块213所在的第三相逆变回路逆变为交流电流，并通过上述第三逆变模块213输出至与发电机的C相相连的负载，从而降低了发电机C相的输出电流，从而使得发电机10的C相输出功率降低。In addition, the third inverter module 213 is connected to the phase corresponding to the third inverter module 213 in the three-phase transmission and distribution line and the DC bus 221 to form a third phase inverter circuit. For example, the third inverter module 213 is connected to the C-phase and N-phase of the generator through the phase corresponding to the third inverter module 213 in the three-phase transmission and distribution line. In this case, when the third inverter module 213 is turned on, the DC current on the DC bus 211 is converted into an AC current through the third-phase inverter circuit where the third inverter module 213 is located, and is passed through the above-mentioned third inverter The module 213 outputs to the load connected to the phase C of the generator, thereby reducing the output current of the phase C of the generator, thereby reducing the output power of the phase C of the generator 10 .
在此基础上，上述控制器222分别与上述第一相整流模块201、第二相整流模块202、第三相整流模块203、第一相逆变模块211、第二相逆变模块212以及第三相逆变模块213相连接。该控制器222用于根据控制器指令分别对第一相整流模块201、第二相整流模块202、第三相整流模块203、第一相逆变模块212、第二相逆变模块212或第三相逆变模块213的启闭进行控制。On this basis, the controller 222 communicates with the first phase rectification module 201, the second phase rectification module 202, the third phase rectification module 203, the first phase inverter module 211, the second phase inverter module 212 and the first phase inverter module 212 respectively. The three-phase inverter modules 213 are connected to each other. The controller 222 is used to control the first phase rectification module 201, the second phase rectification module 202, the third phase rectification module 203, the first phase inverter module 212, the second phase inverter module 212 or the The opening and closing of the three-phase inverter module 213 is controlled.
其中，上述控制指令与发动机10的三相不平衡度有关。在此情况下，控制器222可以根据控制器指令，将第一相整流模块201、第二相整流模块202、第三相整流模块203中与发电机10输出功率较小的相相连接的一个或两个整流模块开启，以使得处于开启状态的整流模块，通过该整流模块所在的整流回路将发电机10中与该整流模块相连接的一相的电流进行整流，并输出至直流母线221。此外，控制器222根据控制器指令，将第一相逆变模块211、第二相逆变模块212、第三相逆变器213中与发电机10输出功率较大的相相连接的一个或两个逆变模块开启，以使得处于开启状态的逆变模块，通过该逆变模块所在的逆变回路将上述直流母线221上的直流电流进行逆变，并输出至发电机10中与该逆变模块相连接的相。这样一来，发电机10输出功率较小的相通过整流回路进行整流，将一部分电能转移至直流母线221从而提高该相输出功率。而直流母线221上的电能通过逆变回路逆变为交流电流，并输出至与发电机10输出功率较大的相相连接的负载，降低了该相的输出电流，从而使得该相的输出功率减小。Wherein, the above-mentioned control instruction is related to the three-phase unbalance degree of the engine 10 . In this case, the controller 222 can connect one of the first phase rectification module 201, the second phase rectification module 202, and the third phase rectification module 203 to the phase with a smaller output power of the generator 10 according to the controller instruction. Or two rectifier modules are turned on, so that the rectifier module in the turned-on state rectifies the current of a phase connected to the rectifier module in the generator 10 through the rectifier circuit where the rectifier module is located, and outputs it to the DC bus 221 . In addition, the controller 222 connects one of the first phase inverter module 211, the second phase inverter module 212, and the third phase inverter 213 that is connected to the phase with a larger output power of the generator 10 or The two inverter modules are turned on, so that the inverter module in the turned-on state inverts the DC current on the above-mentioned DC bus 221 through the inverter circuit where the inverter module is located, and outputs it to the generator 10 to communicate with the inverter. The phases to which the variable modules are connected. In this way, the phase with the lower output power of the generator 10 is rectified through the rectification circuit, and part of the electric energy is transferred to the DC bus 221 to increase the output power of the phase. The electric energy on the DC bus 221 is converted into an AC current through the inverter circuit, and is output to the load connected to the phase with the higher output power of the generator 10, reducing the output current of the phase, thereby making the output power of the phase decrease.
综上所述，通过上述三相功耗不平衡调节装置，可以使得发电机输出功率少的相向输出功率多的相回馈一定的负向补偿功率，从而达到了三相功率平衡的目的。To sum up, through the above-mentioned three-phase power consumption imbalance adjustment device, the phase with less output power of the generator can feed back a certain amount of negative compensation power to the phase with more output power, thereby achieving the purpose of three-phase power balance.
需要说明的是，发电机10处于孤岛运行状态时，发电机的总输出功率P发总＝所有负载接收的总功率P负总。It should be noted that when the generator 10 is in an island operation state, the total output power Pof the generator = the total power P received by all loadsminus total .
其中，发电机10输出总功率P发总等于该发电机10三相分别输出的功率之和，即P发总＝P发A+P发B+P发C。Wherein,the total output power Pfa of the generator 10 is equal to the sum of the output powers of the three phases of the generator 10, that is,Pfa total =PfaA +PfaB +PfaC .
此外，所有负载接收的总功率P负总等于与发电机10三相负载分别接收的功率之和，即P负总＝P负A+P负B+P负C。In addition, the total power Pnegative received by all loads is equal to the sum of the powers received by the three-phase loads of the generator 10 , that is, Pnegative total = Pnegative A +Pnegative B +Pnegative C .
在此基础上，如果设发电机10三相的功率补偿值分别为PAX、PBX以及PCX；其中，当上述功率补偿值为正时，表示在三相功率平衡的过程中，发电机10的各相需要通过整流回路进行输出的功率；而当上述功率补偿值为负时，表示在三相功率平衡的过程中，发电机10的该相负载需要通过逆变回路进行接收的功率。On this basis, if the power compensation values of the three phases of the generator 10 are set to bePAX , PBX andPCX respectively; wherein, when the above power compensation values are positive, it means that in the process of three-phase power balance, the generator Each phase of 10 needs to output power through the rectifier circuit; and when the above-mentioned power compensation value is negative, it means that in the process of three-phase power balance, the phase load of the generator 10 needs to receive power through the inverter circuit.
当忽略该三相功耗不平衡调节装置20在整流和逆变过程中的功率损失时，为了使得发动机10达到三相平衡，需要满足以下公式：When ignoring the power loss of the three-phase power consumption unbalance adjustment device 20 during the rectification and inversion process, in order to make the engine 10 achieve three-phase balance, the following formula needs to be satisfied:
P负A+PAX＝P负B+PBX＝P负C+PCX＝P发总/3；Pnegative A + PAX = Pnegative B + PBX = Pnegative C + PCX = Ptotal /3;
PAX＝P发总/3-P负A；PAX =Phair total /3-Pnegative A ;
PBX＝P发总/3-P负B；PBX ＝Psends total /3-Pnegative B ;
PCX＝P发总/3-P负C；PCX =Phair total /3-Pnegative C ;
综上所述，当获知上述的P负A、P负B、P负C以及P发总的数值大小以及正、负后，便可以计算出发电机10三相的功率补偿值分别为PAX、PBX以及PCX。进而可以使得控制器222通过上述PAX、PBX以及PCX的数值大小以及正、负，控制与发电机10相应相相连接的整流模块或逆变模块的导通角和触发延时角，以对发电机10的各相进行功率补偿。To sum up, after knowing the above-mentioned Pnegative A , Pnegative B , Pnegative C andthe total value of P negative, as well as positive and negative, the power compensation values of the three phases of the generator 10 can be calculated as PAX , PBX and PCX . Furthermore, the controller 222 can control the conduction angle and trigger delay angle of the rectifier module or inverter module connected to the corresponding phase of the generator 10 through the numerical values, positive and negative values of the above-mentionedPAX ,PBX andPCX , To perform power compensation for each phase of the generator 10 .
因此对上述的P负A、P负B、P负C以及P发总的数值大小，以及正、负进行获知。优选的，如图3所示，该三相功耗不平衡调节装置20还包括与控制器222，以及上述发电机10的各相相连接的功率采集器230。该功率采集器230能够对发电机10的各相输出功率(P负A、P负B、P负C)分别进行采集，并将采集结果输出至控制器222。或者，当本领域技术人员可以根据实际经验值获取上述发电机10的各相输出功率时，如图2所示该三相功耗不平衡调节装置20可以不包括如图3所示的功率采集器230。Therefore, the above-mentioned P-A , P-B , P-C and P-fa total numerical values, as well as positive and negative are known. Preferably, as shown in FIG. 3 , the three-phase power consumption unbalance adjusting device 20 further includes a power harvester 230 connected to the controller 222 and each phase of the above-mentioned generator 10 . The power collector 230 can collect the output powers (P−A , P−B , P−C ) of each phase of the generator 10 respectively, and output the collection results to the controller 222 . Alternatively, when those skilled in the art can obtain the output power of each phase of the above-mentioned generator 10 according to actual experience values, the three-phase power consumption unbalance adjustment device 20 as shown in FIG. 2 may not include the power acquisition as shown in FIG. 3 device 230.
以下，对控制器222根据上述功率补偿值PAX、PBX以及PCX对整流模块和逆变模块进行控制的具体进行举例说明。Hereinafter, the control of the rectification module and the inverter module by the controller 222 according to the above-mentioned power compensation values PAX , PBX and PCX will be described with an example.
例如，当发电机10的A和B相负载较小，而C相负载较大时，上述P负A、P负B的数值较小，P负C的数值较大，因此计算出的上述PAX、PBX为正数，而PCX为负数。For example, when the A and B-phase loads of the generator 10 are relatively small, while the C-phase load is relatively large, the above-mentioned values of P-A and P-B are small, and the values of P-C are relatively large, so the calculated PAX and PBX are positive numbers, while PCX is a negative number.
此时，控制器222可以开启与发电机10的A相相连接的第一相整流模块201和与发电机10的B相相连接的第二相整流模块202。具体的，控制器222在开启上述第一相整流模块201和第二相整流模块202时，该第一相整流模块201和第二相整流模块202的导通角和触发延时角可以分别根据PAX、PBX的数值大小进行计算，使得第一相整流模块201的导通角和触发延时角与PAX的数值大小相对应，且第二相整流模块202的导通角和触发延时角与PBX的数值大小相对应。At this time, the controller 222 may turn on the first phase rectification module 201 connected to the A phase of the generator 10 and the second phase rectification module 202 connected to the B phase of the generator 10 . Specifically, when the controller 222 turns on the above-mentioned first phase rectification module 201 and the second phase rectification module 202, the conduction angle and trigger delay angle of the first phase rectification module 201 and the second phase rectification module 202 can be respectively according to The values of PAX and PBX are calculated so that the conduction angle and trigger delay angle of the first-phase rectification module 201 correspond to the value of PAX , and the conduction angle and trigger delay angle of the second-phase rectification module 202 The hour angle corresponds to the numerical value of PBX .
在此情况下，发电机A相输出的交流电流通过第一相整流模块201所在的第一相整流回路整流为直流电流，并输出至直流母线221上。发电机B相输出的交流电流通过第二相整流模块202所在的第二相整流回路整流为直流电流，并输出至直流母线221上。此时，发电机A相和B相输出电流增大，从而增加了发电机A相和B相输出功率。In this case, the AC current output by phase A of the generator is rectified into a DC current through the first phase rectification circuit where the first phase rectification module 201 is located, and output to the DC bus 221 . The AC current output by phase B of the generator is rectified into DC current through the second phase rectification circuit where the second phase rectification module 202 is located, and output to the DC bus 221 . At this time, the output current of phase A and phase B of the generator increases, thereby increasing the output power of phase A and phase B of the generator.
此外，控制器222可以开启与发电机10的C相相连接第三逆变模块213，具体的，控制器222在开启上述第三逆变模块213时，该第三逆变模块213的导通角和触发延时角可以分别根据PCX的数值大小进行计算，使得第三逆变模块213的导通角和触发延时角与PCX的数值大小相对应。In addition, the controller 222 can turn on the third inverter module 213 connected to the phase C of the generator 10. Specifically, when the controller 222 turns on the third inverter module 213, the conduction of the third inverter module 213 The angle and the trigger delay angle can be calculated according to the numerical value ofPCX , so that the conduction angle and the trigger delay angle of the third inverter module 213 correspond to the numerical value ofPCX .
在此情况下，直流母线211上的直流电流通过第三逆变模块213所在的第三相逆变回路逆变为交流电流，并通过上述第三逆变模块213输出至与发电机的C相相连的负载，从而降低了发电机C相的输出电流，从而使得发电机10的C相输出功率降低。这样一来，通过上述三相功耗不平衡调节装置20，可以使得发电机10输出功率少的相向输出功率多的相回馈一定的负向补偿功率，从而达到了三相功率平衡的目的。In this case, the DC current on the DC bus 211 is converted into an AC current through the third-phase inverter circuit where the third inverter module 213 is located, and is output to the phase C phase of the generator through the third inverter module 213 The connected load reduces the output current of the phase C of the generator, thereby reducing the output power of the phase C of the generator 10 . In this way, through the above-mentioned three-phase power consumption unbalance adjustment device 20, the phase with less output power of the generator 10 can feed back a certain amount of negative compensation power to the phase with more output power, thereby achieving the purpose of three-phase power balance.
结合上述控制器222的控制过程，对控制器222的具体结构进行详细的说明。The specific structure of the controller 222 will be described in detail in conjunction with the above-mentioned control process of the controller 222 .
具体的，上述控制器222如图4所示，包括处理模块2221、指令生成模块2222以及指令执行模块2223。Specifically, as shown in FIG. 4 , the above-mentioned controller 222 includes a processing module 2221 , an instruction generation module 2222 and an instruction execution module 2223 .
其中，处理模块2221与功率采集器230相连接，用于根据功率采集器230的采集结果，即发电机10的各相输出功率(P负A、P负B、P负C)以及发电机输出总功率P发总，计算该发电机10的每相平衡所需的功率补偿值(PAX、PBX以及PCX)。Wherein, the processing module 2221 is connected with the power collector 230, and is used to obtain the collection results of the power collector 230, that is, the output power of each phase of the generator 10 (P−A , P−B , P−C ) and the output power of the generator. Thetotal power P is generated, and the power compensation values (PAX , PBX andPCX ) required for each phase balance of the generator 10 are calculated.
上述指令生成模块2222用于根据各个功率补偿值(PAX、PBX以及PCX)生成控制指令。具体的，当上述功率补偿值为正时，该控制指令表示在三相功率平衡的过程中，发电机10的该相的交流电流需要通过整流回路进行整流，并输出至直流母线221。而当上述功率补偿值为负时，该控制指令表示在三相功率平衡的过程中，发电机10的该相负载需要接收通过逆变回路由直流母线221上的直流电流逆变而成的交流电流。The instruction generation module 2222 is used to generate control instructions according to each power compensation value (PAX ,PBX , andPCX ). Specifically, when the above-mentioned power compensation value is positive, the control instruction indicates that the AC current of this phase of the generator 10 needs to be rectified by the rectifier circuit and output to the DC bus 221 during the process of three-phase power balance. And when the above-mentioned power compensation value is negative, the control command indicates that in the process of three-phase power balance, the load of the phase of the generator 10 needs to receive the AC current inverted by the DC current on the DC bus 221 through the inverter circuit. current.
此外，指令执行模块2223连接指令生成模块2222，用于根据控制指令，控制上述第一相整流模块201、第二相整流模块202、第三相整流模块203、第一相逆变模块211、第二相逆变模块212以及第三相逆变模块213的导通角和触发延时角，平衡发电机的各相功率。其中，各相功率的具体平衡过程同上所述，此处不再赘述。In addition, the instruction execution module 2223 is connected to the instruction generation module 2222, and is used to control the first phase rectification module 201, the second phase rectification module 202, the third phase rectification module 203, the first phase inverter module 211, the The conduction angle and trigger delay angle of the two-phase inverter module 212 and the third-phase inverter module 213 balance the power of each phase of the generator. Wherein, the specific balancing process of the power of each phase is the same as that described above, and will not be repeated here.
以下对上述整流模块的具体结构进行详细的说明。The specific structure of the above-mentioned rectification module will be described in detail below.
具体的，如图5所示，上述第一相整流模块201、第二相整流模块202、第三相整流模块203中的任意一个整流模块包括整流器(AC/DC)。该整流器(AC/DC)与上述三相输配线路中与该整流器(AC/DC)相对应的相相连接。例如，第一相整流模块201中的整流器(AC/DC)通过三相输配线路中与该整流器(AC/DC)相对应的相与发电机的A相和N相相连接。第二相整流模块202中的整流器(AC/DC)通过三相输配线路中与该整流器(AC/DC)相对应的相与发电机的B相和N相相连接。第三相整流模块203中的整流器(AC/DC)通过三相输配线路中与该整流器(AC/DC)相对应的相与发电机的C相和N相相连接。在此情况下，上述控制器202可以根据发电机10的每相平衡所需的功率补偿值(PAX、PBX以及PCX)控制整流器(AC/DC)的触发延时角和导通角。Specifically, as shown in FIG. 5 , any one of the first phase rectification module 201 , the second phase rectification module 202 , and the third phase rectification module 203 includes a rectifier (AC/DC). The rectifier (AC/DC) is connected to the phase corresponding to the rectifier (AC/DC) in the above-mentioned three-phase transmission and distribution line. For example, the rectifier (AC/DC) in the first phase rectification module 201 is connected to phase A and phase N of the generator through a phase corresponding to the rectifier (AC/DC) in the three-phase transmission and distribution line. The rectifier (AC/DC) in the second phase rectification module 202 is connected to the B-phase and N-phase of the generator through the phase corresponding to the rectifier (AC/DC) in the three-phase transmission and distribution line. The rectifier (AC/DC) in the third-phase rectification module 203 is connected to the C-phase and N-phase of the generator through the phase corresponding to the rectifier (AC/DC) in the three-phase transmission and distribution line. In this case, the above-mentioned controller 202 can control the firing delay angle and conduction angle of the rectifier (AC/DC) according to the power compensation value (PAX , PBX andPCX ) required for each phase balance of the generator 10 .
在此基础上，由于每个整流回路的整流器301的触发延时角和导通角不同，从而导致不同整流回路的整流器301整流后的直流电压不同，从而无法保证具有不同直流电压的直流均能够回流至直流母线221上。因此，为了解决上述问题，上述任意一个整流模块还包括与整流器(AC/DC)相连接的稳压器(DC/DC)，该稳压器(DC/DC)与直流母线221相连接。这样一来，通过稳压器(DC/DC)可以将不同整流回路的整流器301整流后的直流电压均稳定至一个电压范围后，然后在回流至直流母线221上。On this basis, since the trigger delay angle and conduction angle of the rectifier 301 of each rectification circuit are different, the rectified DC voltages of the rectifiers 301 of different rectification circuits are different, so that it cannot be guaranteed that the DC with different DC voltages can be return to the DC bus 221. Therefore, in order to solve the above problem, any one of the above rectification modules further includes a voltage stabilizer (DC/DC) connected to the rectifier (AC/DC), and the voltage stabilizer (DC/DC) is connected to the DC bus 221 . In this way, the DC voltages rectified by the rectifiers 301 of different rectification circuits can be stabilized to a voltage range through the voltage stabilizer (DC/DC), and then flow back to the DC bus 221 .
此外，上述第一相逆变模块211、第二相逆变模块212、第三相逆变模块213中的任意一个逆变模块包括如图5所示的逆变器(DC/AC)。该逆变器(DC/AC)与直流母线221和上述三相输配线路相连接。例如，第一逆变模块211中的逆变器(DC/AC)通过三相输配线路中与该逆变器(DC/AC)相对应的相与发电机的A相和N相相连接。第二逆变模块212中的逆变器(DC/AC)通过三相输配线路中与该逆变器(DC/AC)相对应的相与发电机的B相和N相相连接。第三逆变模块213中的逆变器(DC/AC)通过三相输配线路中与该逆变器(DC/AC)相对应的相与发电机的C相和N相相连接。在此情况下，上述控制器202可以根据发电机10的每相平衡所需的功率补偿值(PAX、PBX以及PCX)控制逆变器(DC/AC)的触发延时角和导通角。In addition, any one of the above-mentioned first-phase inverter module 211 , second-phase inverter module 212 , and third-phase inverter module 213 includes an inverter (DC/AC) as shown in FIG. 5 . The inverter (DC/AC) is connected with the DC bus 221 and the above-mentioned three-phase transmission and distribution lines. For example, the inverter (DC/AC) in the first inverter module 211 is connected to phase A and phase N of the generator through the phase corresponding to the inverter (DC/AC) in the three-phase transmission and distribution line . The inverter (DC/AC) in the second inverter module 212 is connected to the B-phase and N-phase of the generator through the phase corresponding to the inverter (DC/AC) in the three-phase transmission and distribution line. The inverter (DC/AC) in the third inverter module 213 is connected to the C-phase and N-phase of the generator through the phase corresponding to the inverter (DC/AC) in the three-phase transmission and distribution line. In this case, the above-mentioned controller 202 can control the trigger delay angle and lead-off angle of the inverter (DC/AC) according to the power compensation value (PAX , PBX andPCX ) required for each phase balance of the generator 10. pass angle.
本发明实施例提供一种发电机组01，如图6所示，包括如上所述的任意一种三相功耗不平衡调节装置20以及通过上述三相输配线路与该三相功耗不平衡调节装置20相连接的发电机10。具有与前述实施例提供的三相功耗不平衡调节装置20具有相同的结构和有益效果，由于前述实施例已经对三相功耗不平衡调节装置20的结构和有益效果进行详细的说明，此处不再赘述。The embodiment of the present invention provides a generator set 01, as shown in FIG. 6 , including any three-phase power consumption unbalance adjustment device 20 as described above and the three-phase power consumption imbalance through the above-mentioned three-phase transmission and distribution lines. The regulating device 20 is connected to the generator 10 . It has the same structure and beneficial effects as the three-phase power consumption unbalance adjustment device 20 provided in the foregoing embodiments. Since the foregoing embodiments have described the structure and beneficial effects of the three-phase power consumption unbalance adjustment device 20 in detail, here I won't repeat them here.
在此基础上，优选的，该发电机组01还包括与发电机10和三相功耗不平衡调节装置20相连接的启动器30，该启动器30用于对发电机10的三相不平衡度进行检测，当检测结果大于预设阈值时，启动器30控制改三相功耗不平衡20调节装置开启。其中，上述预设阈值的优选范围为5％～25％。其中，上述预设阈值的设定可以根据发动机10能够承受的三相不平衡的能力进行设定。当发电机10能够承受的三相不平衡的能力较高时，上述预设阈值可以在范围为5％～25％中选取较大的数值，而发电机10能够承受的三相不平衡的能力较低时，上述预设阈值可以在范围为5％～25％中选取较小的数值。本发明对此不作限定。On this basis, preferably, the generator set 01 further includes a starter 30 connected to the generator 10 and the three-phase power consumption unbalance adjustment device 20, and the starter 30 is used to adjust the three-phase unbalance of the generator 10 When the detection result is greater than the preset threshold, the starter 30 controls the three-phase power consumption unbalance 20 adjustment device to start. Wherein, the preferred range of the preset threshold is 5%-25%. Wherein, the setting of the above-mentioned preset threshold can be set according to the ability of the engine 10 to withstand three-phase unbalance. When the ability of the three-phase unbalance that the generator 10 can withstand is high, the above-mentioned preset threshold can select a larger value in the range of 5% to 25%, and the ability of the three-phase unbalance that the generator 10 can withstand When it is relatively low, the aforementioned preset threshold may select a smaller value within a range of 5% to 25%. The present invention is not limited thereto.
需要说明的是，当预设阈值小于上述5％时，发电机10的三相不平衡状态对发电机10造成的不利影响并不是很明显，如果此时三相功耗不平衡调节装置20处于关闭状态，可以节省功耗。此外，当上述预设阈值大于25％时，发电机10的三相不平衡状态对发电机10造成的不利影响很大，如果此时才启动三相功耗不平衡调节装置20，发电机10为了避免损伤以进行停机保护。综上所述，优选的上述预设阈值的范围为5％～25％。在此情况下，当发电机10的三相不平衡度超过上述预设阈值时，三相功耗不平衡调节装置20在启动器30的控制下才启动，并对发动机10的三相功率进行调节，以使得三相功率达到平衡。这样一来，可以在保证发动机10不停机的前提下，避免相功耗不平衡调节装置20时时处于工作状态，从而造成功耗的上升。It should be noted that when the preset threshold is less than the above 5%, the unbalanced three-phase state of the generator 10 will not have an obvious adverse effect on the generator 10. If the three-phase power consumption unbalance adjustment device 20 is in the Off state, can save power consumption. In addition, when the preset threshold value is greater than 25%, the three-phase unbalanced state of the generator 10 will have a great adverse effect on the generator 10. If the three-phase power consumption unbalance adjustment device 20 is started at this time, the generator 10 will In order to avoid damage to stop protection. To sum up, the preferred range of the preset threshold is 5%-25%. In this case, when the three-phase unbalance degree of the generator 10 exceeds the above-mentioned preset threshold, the three-phase power consumption unbalance adjustment device 20 is started under the control of the starter 30, and the three-phase power of the engine 10 is adjusted. Adjusted so that the three-phase power is balanced. In this way, under the premise of ensuring that the engine 10 does not shut down, it is possible to avoid the phase power consumption unbalance adjustment device 20 being in the working state from time to time, thereby causing an increase in power consumption.
本发明实施例提供一种三相功耗不平衡调节装置的控制方法，如图7所示，包括：An embodiment of the present invention provides a control method for a three-phase power consumption unbalance adjustment device, as shown in FIG. 7 , including:
S101、图3中的控制器222根据控制器指令，将第一相整流模块201、第二相整流模块202、第三相整流模块203中与发电机10输出功率较小的相相连接的一个或两个整流模块开启。S101, the controller 222 in FIG. 3 connects one of the first phase rectification module 201, the second phase rectification module 202, and the third phase rectification module 203 to the phase with a smaller output power of the generator 10 according to the controller instruction Or both rectifier modules are turned on.
S102、处于开启状态的整流模块，通过该整流模块所在的整流回路将发电机10中与该整流回路相对应的相电流进行整流，并输出至直流母线221。S102 , the rectification module in the turned-on state rectifies the phase current corresponding to the rectification circuit in the generator 10 through the rectification circuit where the rectification module is located, and outputs it to the DC bus 221 .
例如，控制器222可以开启与发电机10的A相相连接的第一相整流模块201和与发电机10的B相相连接的第二相整流模块202。具体的，控制器222在开启上述第一相整流模块201和第二相整流模块202时，该第一相整流模块201和第二相整流模块202的导通角和触发延时角可以分别根据PAX、PBX的数值大小进行计算，使得第一相整流模块201的导通角和触发延时角与PAX的数值大小相对应，且第二相整流模块202的导通角和触发延时角与PBX的数值大小相对应。For example, the controller 222 may turn on the first phase rectification module 201 connected to the A phase of the generator 10 and the second phase rectification module 202 connected to the B phase of the generator 10 . Specifically, when the controller 222 turns on the above-mentioned first phase rectification module 201 and the second phase rectification module 202, the conduction angle and trigger delay angle of the first phase rectification module 201 and the second phase rectification module 202 can be respectively according to The values of PAX and PBX are calculated so that the conduction angle and trigger delay angle of the first-phase rectification module 201 correspond to the value of PAX , and the conduction angle and trigger delay angle of the second-phase rectification module 202 The hour angle corresponds to the numerical value of PBX .
在此情况下，发电机A相输出的交流电流通过第一相整流模块201所在的第一相整流回路整流为直流电流，并输出至直流母线221上。发电机B相输出的交流电流通过第二相整流模块202所在的第二相整流回路整流为直流电流，并输出至直流母线221上。此时，发电机A相和B相输出电流增大，从而增加了发电机A相和B相输出功率。In this case, the AC current output by phase A of the generator is rectified into a DC current through the first phase rectification circuit where the first phase rectification module 201 is located, and output to the DC bus 221 . The AC current output by phase B of the generator is rectified into DC current through the second phase rectification circuit where the second phase rectification module 202 is located, and output to the DC bus 221 . At this time, the output current of phase A and phase B of the generator increases, thereby increasing the output power of phase A and phase B of the generator.
S103、控制器222根据控制器指令，将第一相逆变模块211、第二相逆变模块212、第三相逆变器213中与发电机10输出功率较大的相相连接的一个或两个逆变模块开启。S103. The controller 222 connects one or more phases of the first phase inverter module 211, the second phase inverter module 212, and the third phase inverter 213 that are connected to the phase with a larger output power of the generator 10 according to the instructions of the controller. Both inverter modules are switched on.
S104、处于开启状态的逆变模块，通过该逆变模块所在的逆变回路将所述直流母线221上的直流电流进行逆变，并输出至发电机10中与该开启的逆变模块相连接的相。S104. The inverter module in the turned-on state inverts the DC current on the DC bus 221 through the inverter circuit where the inverter module is located, and outputs it to the generator 10 to connect with the turned-on inverter module phase.
例如，控制器222可以开启与发电机10的C相相连接第三逆变模块213，具体的，控制器222在开启上述第三逆变模块213时，该第三逆变模块213的导通角和触发延时角可以分别根据PCX的数值大小进行计算，使得第三逆变模块213的导通角和触发延时角与PCX的数值大小相对应。For example, the controller 222 may turn on the third inverter module 213 connected to phase C of the generator 10. Specifically, when the controller 222 turns on the third inverter module 213, the conduction of the third inverter module 213 The angle and the trigger delay angle can be calculated according to the numerical value ofPCX , so that the conduction angle and the trigger delay angle of the third inverter module 213 correspond to the numerical value ofPCX .
在此情况下，直流母线211上的直流电流通过第三逆变模块213所在的第三相逆变回路逆变为交流电流，并通过上述第三逆变模块213输出至与发电机的C相相连的负载，从而降低了发电机C相的输出电流，从而使得发电机10的C相输出功率降低。In this case, the DC current on the DC bus 211 is converted into an AC current through the third-phase inverter circuit where the third inverter module 213 is located, and is output to the phase C phase of the generator through the third inverter module 213 The connected load reduces the output current of the phase C of the generator, thereby reducing the output power of the phase C of the generator 10 .
这样一来，通过上述三相功耗不平衡调节装置20，可以使得发电机10输出功率少的相向输出功率多的相回馈一定的负向补偿功率，从而达到了三相功率平衡的目的。In this way, through the above-mentioned three-phase power consumption unbalance adjustment device 20, the phase with less output power of the generator 10 can feed back a certain amount of negative compensation power to the phase with more output power, thereby achieving the purpose of three-phase power balance.
在此基础上，当三相功耗不平衡调节装置20如图4所示还包括功率采集器230，控制器222包括处理模块2221、指令生成模块2222以及指令执行模块2223时，上述方法包括：On this basis, when the three-phase power consumption unbalance adjustment device 20 further includes a power collector 230 as shown in FIG. 4 , and the controller 222 includes a processing module 2221, an instruction generation module 2222, and an instruction execution module 2223, the above method includes:
首先，功率采集器230对发电机10的各相输出功率(P负A、P负B、P负C)分别进行采集。Firstly, the power harvester 230 collects the output power of each phase (P−A , P−B , P−C ) of the generator 10 respectively.
然后，处理模块2221根据功率采集器230的采集结果，即发电机10的各相输出功率(P负A、P负B、P负C)以及发电机输出总功率P发总，计算发电机10的每相平衡所需的功率补偿值(PAX、PBX以及PCX)。Then, the processing module 2221 calculates the output power of the generator 10 according to the collection result of the power collector 230, that is, the output power of each phase of the generator 10 (P-A , P-B , P-C ) andthe total output power of the generator P. The power compensation values (PAX , PBX and PCX ) required for each phase balance of .
接下来，指令生成模块2222根据各个功率补偿值PAX、PBX以及PCX)生成控制指令。Next, the command generation module 2222 generates control commands according to each power compensation value (PAX ,PBX , andPCX ).
具体的，当上述功率补偿值为正时，该控制指令表示在三相功率平衡的过程中，发电机10的该相的交流电流需要通过整流回路进行整流，并输出至直流母线221。而当上述功率补偿值为负时，该控制指令表示在三相功率平衡的过程中，发电机10的该相负载需要接收通过逆变回路由直流母线221上的直流电流逆变而成的交流电流。Specifically, when the above-mentioned power compensation value is positive, the control instruction indicates that the AC current of this phase of the generator 10 needs to be rectified by the rectifier circuit and output to the DC bus 221 during the process of three-phase power balance. And when the above-mentioned power compensation value is negative, the control command indicates that in the process of three-phase power balance, the load of the phase of the generator 10 needs to receive the AC current inverted by the DC current on the DC bus 221 through the inverter circuit. current.
最后，指令执行模块2223根据控制指令，控制上述第一相整流模块201、第二相整流模块202、第三相整流模块203、第一相逆变模块211、第二相逆变模块212以及第三相逆变模块213的导通角和触发延时角，平衡发电机的各相输出功率。其中，各相输出功率的具体平衡过程同上所述，此处不再赘述。Finally, the instruction execution module 2223 controls the first phase rectification module 201, the second phase rectification module 202, the third phase rectification module 203, the first phase inverter module 211, the second phase inverter module 212 and the first phase inverter module 212 according to the control instruction. The conduction angle and trigger delay angle of the three-phase inverter module 213 balance the output power of each phase of the generator. Wherein, the specific balancing process of the output power of each phase is the same as that described above, and will not be repeated here.
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217529.4ACN106532748B (en) | 2016-12-23 | 2016-12-23 | A kind of three-phase power consumption imbalance regulating device and its control method, generating set |
| Application Number | Priority Date | Filing Date | Title |
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| CN201611217529.4ACN106532748B (en) | 2016-12-23 | 2016-12-23 | A kind of three-phase power consumption imbalance regulating device and its control method, generating set |
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| CN106532748B CN106532748B (en) | 2019-01-29 |
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| CN201611217529.4AExpired - Fee RelatedCN106532748B (en) | 2016-12-23 | 2016-12-23 | A kind of three-phase power consumption imbalance regulating device and its control method, generating set |
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