技术领域Technical Field
本发明涉及信息监测高压直流变换器的辅助供电技术，具体涉及一种用于MMC型变换器的中央控制器供电系统和供电方法。The invention relates to an auxiliary power supply technology for an information monitoring high-voltage direct current converter, and in particular to a central controller power supply system and a power supply method for an MMC type converter.
背景技术Background technique
在输入电压较高的应用场合，通常需要使用电路串联来承受高电压。一种基于模块化多电平变换器(Modular multilevel converter,MMC)的隔离型高压直流电源的电路拓扑如图1所示，主要包括：MMC桥臂、谐振腔、变压器、整流桥和输出滤波电容，采用变压器实现输入与输出的电气隔离。单相MMC电路包含上下两个桥臂，每个桥臂包含电感L与N个级联的功率模块SM1～SMN。每个功率模块内部包含主电路、模块控制电路和模块辅助电源，主电路为半桥结构，包含上下两个功率开关Q1、Q2和直流电容CSM，模块辅助电源可以直接从模块的主电路电容上取电，给模块控制电路供电，如图2所示的高压直流电源的控制系统与辅助供电。In applications where the input voltage is high, it is usually necessary to use a circuit series connection to withstand the high voltage. The circuit topology of an isolated high-voltage DC power supply based on a modular multilevel converter (MMC) is shown in Figure 1, which mainly includes: an MMC bridge arm, a resonant cavity, a transformer, a rectifier bridge and an output filter capacitor. The transformer is used to achieve electrical isolation between the input and output. The single-phase MMC circuit includes two upper and lower bridge arms, each of which includes an inductor L and N cascaded power modules SM1~SMN. Each power module contains a main circuit, a module control circuit and a module auxiliary power supply. The main circuit is a half-bridge structure, including two upper and lower power switches Q1, Q2 and a DC capacitor CSM. The module auxiliary power supply can directly draw power from the main circuit capacitor of the module to power the module control circuit, as shown in Figure 2.
此外，整个高压电源还需要一个中央控制器负责执行主要控制算法，并通过光纤连接所有的模块，下发指令实现系统的控制，中央控制器也需要辅助电源为其提供电力。In addition, the entire high-voltage power supply also requires a central controller to execute the main control algorithm, connect all modules through optical fiber, and issue instructions to control the system. The central controller also requires an auxiliary power supply to provide power for it.
传统的中央控制器辅助电源参考了低压电源的取电方案，从原边高压侧取电启动，待系统正常运行后从副边输出侧取电，如图3所示的传统中央控制器供电方案。从原边取电的启动电路包括电阻Rs、储能电容Cs、开关S与辅助电源Pm1。原边MMC的其中一个功率模块的辅助电源P1给储能电容Cs充电，电阻Rs用于限制充电电流。Cs的电压上升至设定值后，开关S闭合，辅助电源Pm1开始供电，中央控制器开始工作，启动整个电源。中央控制器电源从功率模块的取电必须很小，否则会使该功率模块电容上电压下降太多，从而影响正常运行。在开关S闭合之后的电源启动期间，中央控制器实际上始终从储能电容Cs取电。The traditional central controller auxiliary power supply refers to the power supply scheme of the low-voltage power supply, starting from the high-voltage side of the primary side, and then starting from the secondary side output side after the system is running normally, as shown in Figure 3. The startup circuit that takes power from the primary side includes a resistor Rs, an energy storage capacitor Cs, a switch S, and an auxiliary power supply Pm1. The auxiliary power supply P1 of one of the power modules of the primary side MMC charges the energy storage capacitor Cs, and the resistor Rs is used to limit the charging current. After the voltage of Cs rises to the set value, the switch S is closed, the auxiliary power supply Pm1 starts to supply power, the central controller starts working, and the entire power supply is started. The power taken by the central controller power supply from the power module must be very small, otherwise the voltage on the capacitor of the power module will drop too much, thus affecting normal operation. During the power startup period after the switch S is closed, the central controller actually always takes power from the energy storage capacitor Cs.
在电源启动完成后，电源进入正常运行，输出电压达到额定值，辅助电源Pm2开始工作，可持续给中央控制器供电。正常工作期间，中央控制器始终从输出侧取电。After the power supply is started, the power supply enters normal operation, the output voltage reaches the rated value, and the auxiliary power supply Pm2 starts to work, which can continuously supply power to the central controller. During normal operation, the central controller always draws power from the output side.
传统中央控制器供电方案存在以下问题：The traditional central controller power supply solution has the following problems:
1)需要从原边和副边两侧取电，而中央控制器电位只能与其中的一侧相同或接近。由于高压直流电源一般要求原副边具有很高的隔离的电压，因此Pm1和Pm2中的一个辅助电源需要承受高绝缘电压。例如，中央控制器与副边输出侧等电位，则原边高压侧的辅助供电模块Pm1需要很高的隔离电压等级。1) It is necessary to draw power from both the primary and secondary sides, and the potential of the central controller can only be the same or close to that of one side. Since high-voltage DC power supplies generally require a very high isolation voltage between the primary and secondary sides, one of the auxiliary power supplies Pm1 and Pm2 needs to withstand a high insulation voltage. For example, if the central controller and the secondary output side are at the same potential, the auxiliary power supply module Pm1 on the primary high-voltage side requires a very high isolation voltage level.
2)电源系统在整个启动过程中完全依赖Cs的充电能量，因此Cs需要设置相当大的电容量。2) The power system is completely dependent on the charging energy of Cs during the entire startup process, so Cs needs to have a fairly large capacity.
3)若由于负载短路等故障产生时，中央控制器供电中断，会出现启动电路反复启动等情况，容易造成电源故障。3) If the power supply to the central controller is interrupted due to a load short circuit or other faults, the starting circuit may start repeatedly, which may easily cause a power failure.
发明内容Summary of the invention
为了克服现有技术的不足，本发明的目的在于提供一种用于MMC型变换器的中央控制器供电的系统和方法，其能解决上述问题。In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a system and method for powering a central controller of an MMC type converter, which can solve the above-mentioned problems.
设计原理：提出一种新的中央控制器供电方案，中央控制器仅从原边高压侧的一个功率模块取电，并通过控制功率模块中功率开关的动作，将电能从高压输入传输至该功率模块。本发明省略了从副边供电的辅助电源，可以设置中央控制器与原边高压侧某一模块同电位，降低对辅助电源绝缘电压的要求；并且可以降低对储能电容容量需求；在停止对负载供电时，仍然可以保持中央控制器工作。Design principle: A new central controller power supply scheme is proposed. The central controller only draws power from a power module on the primary high-voltage side, and transmits power from the high-voltage input to the power module by controlling the action of the power switch in the power module. The present invention omits the auxiliary power supply from the secondary side, and can set the central controller to the same potential as a module on the primary high-voltage side, reducing the requirements for the insulation voltage of the auxiliary power supply; and can reduce the requirements for the capacity of the energy storage capacitor; when the power supply to the load is stopped, the central controller can still be kept working.
本发明实施例的第一方面，提供一种用于MMC型变换器的中央控制器供电系统，该系统包括：MMC桥臂、取电电路、中央控制器；取电电路包括第一开关S1、第二开关S2、限流电阻Rs、储能电容Cs和DC/DC电源PM1，所述限流电阻Rs与第一开关S1依次串连在DC/DC电源PM1的正极输入线上，第二开关S2与限流电阻Rs并联，所述储能电容Cs的上游端与S1的上游端相连，下游端连接至DC/DC电源PM1的负极输入线上；MMC桥臂包括两个串连的子桥臂，每个子桥臂包括一个电感L和N个级联的功率子模块，所述MMC桥臂通过功率子模块的连接向外输出高压直流电，其中，N≥1，N为正整数；取电电路的输入侧与所述MMC桥臂连接，取电电路的输出侧与所述中央控制器连接；中央控制器控制第一开关S1和第二开关S2的状态，以持续给中央控制器供电。According to a first aspect of an embodiment of the present invention, a central controller power supply system for an MMC type converter is provided, the system comprising: an MMC bridge arm, a power taking circuit, and a central controller; the power taking circuit comprises a first switch S1, a second switch S2, a current limiting resistor Rs, an energy storage capacitor Cs, and a DC/DC power supply PM1, wherein the current limiting resistor Rs and the first switch S1 are sequentially connected in series on the positive input line of the DC/DC power supply PM1, the second switch S2 is connected in parallel with the current limiting resistor Rs, the upstream end of the energy storage capacitor Cs is connected to the upstream end of S1, and the downstream end is connected to the negative input line of the DC/DC power supply PM1; the MMC bridge arm comprises two series-connected sub-bridge arms, each sub-bridge arm comprises an inductor L and N cascaded power sub-modules, the MMC bridge arm outputs high-voltage direct current to the outside through the connection of the power sub-modules, wherein N≥1, and N is a positive integer; the input side of the power taking circuit is connected to the MMC bridge arm, and the output side of the power taking circuit is connected to the central controller; the central controller controls the states of the first switch S1 and the second switch S2 to continuously supply power to the central controller.
在一个实施例中，功率子模块包括串连的上功率管和下功率管、直流功率电容Csmi、辅助电源Pi和子模块控制器，辅助电源Pi的输入并联在功率电容Csmi两端，其中，i＝1、2、3……2N，N为正整数，子模块控制器输入和输出分别和辅助电源Pi及中央控制器连接。In one embodiment, the power submodule includes an upper power tube and a lower power tube connected in series, a DC power capacitor Csmi, an auxiliary power supply Pi and a submodule controller, and the input of the auxiliary power supply Pi is connected in parallel at both ends of the power capacitor Csmi, where i=1, 2, 3...2N, N is a positive integer, and the input and output of the submodule controller are respectively connected to the auxiliary power supply Pi and the central controller.
在一个实施例中，MMC桥臂的输入侧连接高压直流电压HV，以对各功率子模块的直流电容充电，所有功率子模块的辅助电源开始工作，给各子模块控制器供电。In one embodiment, the input side of the MMC bridge arm is connected to a high-voltage DC voltage HV to charge the DC capacitor of each power submodule, and the auxiliary power supplies of all power submodules start working to supply power to each submodule controller.
在一个实施例中，中央控制器控制第一开关S1和第二开关S2的状态，以持续给中央控制器供电包括：中央控制器监测每个功率子模块的功率电容Csmi的电压、储能电容Cs的电压值，控制每个功率子模块的状态，及第一开关S1和第二开关S2的状态，以持续给中央控制器供电；In one embodiment, the central controller controls the state of the first switch S1 and the second switch S2 to continuously supply power to the central controller, including: the central controller monitors the voltage of the power capacitor Csmi and the voltage value of the energy storage capacitor Cs of each power submodule, controls the state of each power submodule, and the state of the first switch S1 and the second switch S2 to continuously supply power to the central controller;
在一个实施例中，中央控制器监测每个功率子模块的功率电容Csmi的电压、储能电容Cs的电压值，控制每个功率子模块的状态，及第一开关S1和第二开关S2的状态，以持续给中央控制器供电具体包括：储能电容Cs与第一开关S1联动，当储能电容Cs电压达到阈值后第一开关S1闭合；PM1工作给中央控制器供电；中央控制器工作后监测所有功率子模块的电容电压，实施电压平衡策略，选取当期内的供电功率子模块；当平衡策略工作后，中央控制器控制闭合第二开关S2，使用选定的功率子模块持续给中央控制器供电。In one embodiment, the central controller monitors the voltage of the power capacitor Csmi and the voltage value of the energy storage capacitor Cs of each power sub-module, controls the state of each power sub-module, and the state of the first switch S1 and the second switch S2, so as to continuously supply power to the central controller. Specifically, the energy storage capacitor Cs is linked with the first switch S1, and the first switch S1 is closed when the voltage of the energy storage capacitor Cs reaches a threshold; PM1 works to supply power to the central controller; after the central controller works, it monitors the capacitor voltages of all power sub-modules, implements a voltage balancing strategy, and selects the power supply power sub-module within the current period; when the balancing strategy works, the central controller controls the closing of the second switch S2, and uses the selected power sub-module to continuously supply power to the central controller.
在一个实施例中，电压平衡策略包括，中央控制器定时或定期监测每个功率子模块的直流电压并排序，将上、下桥臂中各前M个高电压值的模块的下管导通，其中，M＜N，M和N为正整数，使得任一时刻MMC桥臂有2(N-M)个直流功率电容Csmi投入充电；剩余2M个直流功率电容Csmi不充电；以此定期循环往复，实现各个直流功率电容Csmi的动态均衡。In one embodiment, the voltage balancing strategy includes that the central controller regularly or periodically monitors the DC voltage of each power sub-module and sorts it, and turns on the lower tubes of the first M modules with high voltage values in the upper and lower bridge arms, where M<N, M and N are positive integers, so that at any time, 2 (N-M) DC power capacitors Csmi in the MMC bridge arm are charged; the remaining 2M DC power capacitors Csmi are not charged; this cycle is repeated regularly to achieve dynamic balance of each DC power capacitor Csmi.
在一个实施例中，取电电路还包括取电控制器，取电控制器接收中央控制器的指令，控制第一开关S1和第二开关S2的状态；每个功率子模块还包括子模块控制器，所述子模块控制器接收中央控制器的指令，控制功率子模块内的上功率管和下功率管的状态。In one embodiment, the power taking circuit also includes a power taking controller, which receives instructions from the central controller and controls the states of the first switch S1 and the second switch S2; each power sub-module also includes a sub-module controller, which receives instructions from the central controller and controls the states of the upper power tube and the lower power tube in the power sub-module.
本发明实施例的第二方面，提供一种根据前述系统的供电方法，该方法包括以下步骤：A second aspect of an embodiment of the present invention provides a power supply method according to the aforementioned system, the method comprising the following steps:
步骤1：MMC桥臂启动充电，启动前第一开关S1、第二开关S2呈断开状态，当高压侧加电之后MMC桥臂开始启动，所有功率子模块的直流功率电容Csmi串联充电；Step 1: The MMC bridge arm starts charging. Before starting, the first switch S1 and the second switch S2 are in the disconnected state. When the high-voltage side is powered on, the MMC bridge arm starts to start, and the DC power capacitors Csmi of all power submodules are charged in series.
步骤2：储能电容充电，当所有功率子模块的直流功率电容Csmi的电压达到设定值后辅助电源Pi工作，并且取电电路通过限流电阻Rs给储能电容Cs充电；Step 2: Charging the energy storage capacitor. When the voltage of the DC power capacitor Csmi of all power submodules reaches the set value, the auxiliary power supply Pi works, and the power taking circuit charges the energy storage capacitor Cs through the current limiting resistor Rs.
步骤3：取电电路供电，当储能电容Cs电压达到阈值后，第一开关S1闭合，DC/DC电源PM1工作给中央控制器供电；Step 3: The power supply circuit supplies power. When the voltage of the energy storage capacitor Cs reaches the threshold, the first switch S1 is closed, and the DC/DC power supply PM1 works to supply power to the central controller.
步骤4：电压平衡并选取供电功率子模块，中央控制器受电工作后，实时或定期监测所有功率子模块的直流功率电容的电压，并实施电压平衡策略；Step 4: Balancing the voltage and selecting the power supply submodule. After the central controller is powered on, it monitors the voltage of the DC power capacitors of all power submodules in real time or regularly, and implements the voltage balancing strategy.
步骤5：供电子模块持续供电，当平衡策略工作后，中央控制器控制闭合第二开关S2，选定的功率子模块持续给中央控制器供电。Step 5: The power supply submodule continues to supply power. When the balancing strategy works, the central controller controls the closing of the second switch S2, and the selected power submodule continues to supply power to the central controller.
在一个实施例中，电压平衡策略包括以下步骤：In one embodiment, the voltage balancing strategy includes the following steps:
步骤41：中央控制器实时或定期监测每个功率子模块的输出电压并排序；Step 41: The central controller monitors the output voltage of each power submodule in real time or periodically and sorts the output voltage;
步骤42：上下两个桥臂各选出电压最高的M个模块，并将这些功率子模块的下管导通，其中M＜N，M和N为正整数，使得任一时刻MMC桥臂有2(N-M)个直流功率电容Csmi投入充电；Step 42: The upper and lower bridge arms each select M modules with the highest voltage, and turn on the lower tubes of these power sub-modules, where M＜N, M and N are positive integers, so that at any time, 2 (N-M) DC power capacitors Csmi in the MMC bridge arm are charged;
步骤43：重复步骤S41-S42，以此循环往复实现各个直流功率电容Csmi实现动态均衡；Step 43: repeat steps S41-S42, and repeat this cycle to achieve dynamic balancing of each DC power capacitor Csmi;
步骤43：在监测到2M个直流功率电容Csmi低于下限值后，切除所述2M个功率电容，接入剩余的2(N-M)个直流功率电容充电；Step 43: after monitoring that the 2M DC power capacitors Csmi are lower than the lower limit, the 2M power capacitors are removed and the remaining 2 (N-M) DC power capacitors are connected for charging;
步骤44：重复步骤S41-S43，以此循环往复实现各个直流功率电容Csmi实现动态均衡。Step 44: Repeat steps S41-S43 in a cycle to achieve dynamic balancing of each DC power capacitor Csmi.
相比现有技术，本发明的有益效果在于：Compared with the prior art, the present invention has the following beneficial effects:
1.中央控制器完全从原边取电，降低了对辅助电源的隔离电压的要求。1. The central controller is powered entirely from the primary side, reducing the isolation voltage requirements for the auxiliary power supply.
2.启动过程无需主电路完全工作，减少储能电容的容量。2. The startup process does not require the main circuit to be fully operational, reducing the capacity of the energy storage capacitor.
3.只需要输入侧建立高压直流电压，所有的辅助电源就能启动，模块控制器和中央控制器能正常工作，控制部分在负载短路故障后仍然可以正常工作，仍可通过通信与外界保持联系。3. Only high-voltage DC voltage needs to be established on the input side, and all auxiliary power supplies can be started, the module controller and the central controller can work normally, the control part can still work normally after a load short-circuit fault, and can still maintain contact with the outside world through communication.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更加清楚地说明本发明实施例中涉及的技术方案，下面将针对本发明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性的前提下，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 involved in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
图1示意性示出了基于MMC的高压直流电源示意图；FIG1 schematically shows a schematic diagram of a high voltage DC power supply based on MMC;
图2示意性示出了高压直流电源的控制系统与辅助供电示意图；FIG2 schematically shows a control system and auxiliary power supply diagram of a high voltage DC power supply;
图3示意性示出了传统中央控制器供电系统的示意图；FIG3 schematically shows a schematic diagram of a traditional central controller power supply system;
图4示意性示出了用于MMC型变换器的中央控制器供电系统的示意图。FIG. 4 schematically shows a schematic diagram of a central controller power supply system for an MMC type converter.
图5示意性示出了用于MMC型变换器的中央控制器供电系统的供电方法的流程图。FIG5 schematically shows a flow chart of a power supply method for a central controller power supply system of an MMC type converter.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，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，所描述的实施例是本发明的一部分实施例，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的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。In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
以下，将参照附图来描述本公开的实施例。但是应该理解，这些描述只是示例性的，而并非要限制本公开的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本公开的概念。Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.
在此使用的术语仅仅是为了描述具体实施例，而并非意在限制本公开。这里使用的词语“一”、“一个(种)”和“该”等也应包括“多个”、“多种”的意思，除非上下文另外明确指出。The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The words "a", "an", and "the" used herein should also include the meanings of "plurality" and "multiples", unless the context clearly indicates otherwise.
在此使用的所有术语(包括技术和科学术语)具有本领域技术人员通常所理解的含义，除非另外定义。应注意，这里使用的术语应解释为具有与本说明书的上下文相一致的含义，而不应以理想化或过于刻板的方式来解释。All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.
相比于现有技术，本公开的实施例提供了相比于现有技术，本公开的实施例提供了一种用于MMC型变换器的中央控制器供电系统，该系统包括：MMC桥臂、取电电路、中央控制器；取电电路包括第一开关S1、第二开关S2、限流电阻Rs、储能电容Cs和DC/DC电源PM1，限流电阻Rs与第一开关S1依次串连在DC/DC电源PM1的正极输入线上，第二开关S2与限流电阻Rs并联，储能电容Cs的上游端与S1的上游端相连，下游端连接至DC/DC电源PM1的负极输入线上；MMC桥臂包括两个串连的子桥臂，每个子桥臂包括一个电感L和N个级联的功率子模块，MMC桥臂通过功率子模块的连接向外输出高压直流电；取电电路的输入侧与所述MMC桥臂连接，取电电路的输出侧与中央控制器连接；中央控制器控制第一开关S1和第二开关S2的状态，以持续给中央控制器供电。由于本方案中通过中央控制器仅从原边高压侧的一个功率模块取电，并通过控制功率模块中功率开关的动作，将电能从高压输入传输至该功率模块，省略了从副边供电的辅助电源；此外可以设置中央控制器与原边高压侧某一模块同电位，降低对辅助电源绝缘电压的要求；并且可以降低对储能电容容量需求；在停止对负载供电时，仍然可以保持中央控制器工作。以下将结合附图来详细描述本发明的实施例及其优点。在以下描述中，出于阐释的目的，陈述大量特定细节以便提供对一个或一个以上方面的透彻理解。然而，可显而易见，可在无这些特定细节的情况下实践各种方面。在其它实施例子中，以框图形式来展示众所周知的结构和平台，以便促进描述这些方面。Compared with the prior art, the embodiments of the present disclosure provide a central controller power supply system for an MMC type converter, the system comprising: an MMC bridge arm, a power taking circuit, and a central controller; the power taking circuit comprises a first switch S1, a second switch S2, a current limiting resistor Rs, an energy storage capacitor Cs, and a DC/DC power supply PM1, the current limiting resistor Rs and the first switch S1 are sequentially connected in series on the positive input line of the DC/DC power supply PM1, the second switch S2 is connected in parallel with the current limiting resistor Rs, the upstream end of the energy storage capacitor Cs is connected to the upstream end of S1, and the downstream end is connected to the negative input line of the DC/DC power supply PM1; the MMC bridge arm comprises two series-connected sub-bridge arms, each sub-bridge arm comprises an inductor L and N cascaded power sub-modules, and the MMC bridge arm outputs high-voltage direct current to the outside through the connection of the power sub-modules; the input side of the power taking circuit is connected to the MMC bridge arm, and the output side of the power taking circuit is connected to the central controller; the central controller controls the states of the first switch S1 and the second switch S2 to continuously supply power to the central controller. Since the central controller in this solution only draws power from one power module on the primary high-voltage side, and transmits electrical energy from the high-voltage input to the power module by controlling the action of the power switch in the power module, the auxiliary power supply from the secondary side is omitted; in addition, the central controller can be set to the same potential as a module on the primary high-voltage side to reduce the requirements for the insulation voltage of the auxiliary power supply; and the requirements for the capacity of the energy storage capacitor can be reduced; when the power supply to the load is stopped, the central controller can still be kept working. The embodiments of the present invention and their advantages will be described in detail below in conjunction with the accompanying drawings. In the following description, for the purpose of explanation, a large number of specific details are stated in order to provide a thorough understanding of one or more aspects. However, it can be obvious that various aspects can be practiced without these specific details. In other implementation examples, well-known structures and platforms are shown in block diagram form to facilitate the description of these aspects.
第一实施例First embodiment
如图4所示，为本发明实施例提供的一种用于MMC型变换器的中央控制器供电系统的示意图，用于持续给给中央控制器供电。As shown in FIG. 4 , it is a schematic diagram of a central controller power supply system for an MMC type converter provided by an embodiment of the present invention, which is used to continuously supply power to the central controller.
该系统包括：MMC桥臂、取电电路、中央控制器，所述取电电路的输入侧与所述MMC桥臂的一个模块，所述取电电路的输出侧与所述中央控制器连接。取电电路包括第一开关S1、第二开关S2、限流电阻Rs、储能电容Cs和DC/DC电源PM1，限流电阻Rs与第一开关S1依次串连在DC/DC电源PM1的正极输入线上，第二开关S2与限流电阻Rs并联，储能电容Cs的上游端与S1的上游端相连，下游端连接至DC/DC电源PM1的负极输入线上；MMC桥臂包括两个串连的子桥臂，每个子桥臂包括一个电感L和N个级联的功率子模块，MMC桥臂通过功率子模块的连接向外输出高压直流电，其中，N≥1，N为正整数；取电电路的输入侧与MMC桥臂连接，取电电路的输出侧与中央控制器连接；中央控制器控制第一开关S1和第二开关S2的状态，以稳定给中央控制器供电。The system comprises: an MMC bridge arm, a power taking circuit, and a central controller. The input side of the power taking circuit is connected to a module of the MMC bridge arm, and the output side of the power taking circuit is connected to the central controller. The power supply circuit includes a first switch S1, a second switch S2, a current limiting resistor Rs, an energy storage capacitor Cs and a DC/DC power supply PM1. The current limiting resistor Rs and the first switch S1 are connected in series on the positive input line of the DC/DC power supply PM1 in sequence, the second switch S2 is connected in parallel with the current limiting resistor Rs, the upstream end of the energy storage capacitor Cs is connected to the upstream end of S1, and the downstream end is connected to the negative input line of the DC/DC power supply PM1; the MMC bridge arm includes two series-connected sub-bridge arms, each sub-bridge arm includes an inductor L and N cascaded power sub-modules, and the MMC bridge arm outputs high-voltage direct current to the outside through the connection of the power sub-modules, where N≥1, and N is a positive integer; the input side of the power supply circuit is connected to the MMC bridge arm, and the output side of the power supply circuit is connected to the central controller; the central controller controls the states of the first switch S1 and the second switch S2 to stably supply power to the central controller.
可选的，功率子模块包括串连的上功率管和下功率管、直流功率电容Csmi、辅助电源Pi和子模块控制器，辅助电源Pi的输入并联在功率电容Csmi两端，其中，i＝1、2、3……2N，N为正整数，子模块控制器输入和输出分别和辅助电源Pi及中央控制器连接，以此可控的给储能电容Cs充电并向中央控制器供电。Optionally, the power sub-module includes an upper power tube and a lower power tube connected in series, a DC power capacitor Csmi, an auxiliary power supply Pi and a sub-module controller. The input of the auxiliary power supply Pi is connected in parallel at both ends of the power capacitor Csmi, where i=1, 2, 3...2N, N is a positive integer, and the input and output of the sub-module controller are respectively connected to the auxiliary power supply Pi and the central controller, so as to controllably charge the energy storage capacitor Cs and supply power to the central controller.
可选的，MMC桥臂的输入侧连接高压直流电压HV，以对各功率子模块的直流电容充电，所有功率子模块的辅助电源开始工作，给各子模块控制器和和驱动电路供电。Optionally, the input side of the MMC bridge arm is connected to a high-voltage DC voltage HV to charge the DC capacitor of each power sub-module, and the auxiliary power supplies of all power sub-modules start working to supply power to each sub-module controller and drive circuit.
可选的，中央控制器控制第一开关S1和第二开关S2的状态，以持续给中央控制器供电包括：中央控制器监测每个功率子模块的功率电容Csmi的电压、储能电容Cs的电压值，控制每个功率子模块的状态，及第一开关S1和第二开关S2的状态，以持续给中央控制器供电；Optionally, the central controller controls the state of the first switch S1 and the second switch S2 to continuously supply power to the central controller, including: the central controller monitors the voltage of the power capacitor Csmi and the voltage value of the energy storage capacitor Cs of each power sub-module, controls the state of each power sub-module, and the state of the first switch S1 and the second switch S2, to continuously supply power to the central controller;
可选的，中央控制器监测每个功率子模块的功率电容Csmi的电压、储能电容Cs的电压值，控制每个功率子模块的状态，及第一开关S1和第二开关S2的状态，以持续给中央控制器供电具体包括：储能电容Cs与第一开关S1联动，当储能电容Cs电压达到阈值后第一开关S1闭合；第一开关闭合之后，中央控制器开始工作，PM1工作给中央控制器供电；中央控制器工作后监测所有功率子模块的电容电压，实施电压平衡策略，同时中央控制器的工作会消耗Cs上的储能，因此，当中央控制实施电压平衡策略之后，控制第二开关S2闭合，使用选定的功率子模块持续给中央控制器供电，中央控制器得到稳定供电。Optionally, the central controller monitors the voltage of the power capacitor Csmi and the voltage value of the energy storage capacitor Cs of each power sub-module, controls the state of each power sub-module, and the states of the first switch S1 and the second switch S2, so as to continuously supply power to the central controller. Specifically, the energy storage capacitor Cs is linked with the first switch S1, and the first switch S1 is closed when the voltage of the energy storage capacitor Cs reaches a threshold value; after the first switch is closed, the central controller starts working, and PM1 works to supply power to the central controller; after the central controller works, it monitors the capacitor voltages of all power sub-modules and implements a voltage balancing strategy. At the same time, the operation of the central controller will consume the energy stored on Cs. Therefore, after the central controller implements the voltage balancing strategy, it controls the second switch S2 to close, and uses the selected power sub-module to continuously supply power to the central controller, so that the central controller obtains stable power supply.
可选的，监测可以是实时的或定时的，也可以是通过其他条件触发的，本发明对此不做具体的限定。Optionally, the monitoring may be real-time or timed, or may be triggered by other conditions, which is not specifically limited in the present invention.
取电电路通过限流电阻Rs给储能电容Cs充电；充电功率需要很小，避免模块电容消耗功率不同而造成电容电压较大的不平衡；当储能电容Cs电压达到阈值后，第一开关S1闭合，辅助电源PM1开始工作，给中央控制器供电，在启动过程期间，中央控制器仅仅消耗储能电容Cs上存储的电能。中央控制器仅从其中一个功率模块的直流电容取电，平衡策略用于辅助供电系统用来稳定各个功率模块的电容电压。The power-taking circuit charges the energy storage capacitor Cs through the current-limiting resistor Rs; the charging power needs to be very small to avoid large imbalances in capacitor voltage caused by different power consumption of module capacitors; when the voltage of the energy storage capacitor Cs reaches the threshold, the first switch S1 is closed, and the auxiliary power supply PM1 starts to work to supply power to the central controller. During the startup process, the central controller only consumes the electric energy stored in the energy storage capacitor Cs. The central controller only draws power from the DC capacitor of one of the power modules, and the balancing strategy is used to assist the power supply system to stabilize the capacitor voltages of each power module.
可选的，电压平衡策略包括，中央控制器定时或定期监测每个功率子模块的直流电压并排序，将上、下桥臂中各前M个高电压值的模块的下管导通，其中，M＜N，M和N为正整数，使得任一时刻MMC桥臂有2(N-M)个直流功率电容Csmi投入充电；剩余2M个直流功率电容Csmi不充电；以此定期循环往复，实现各个直流功率电容Csmi的动态均衡。Optionally, the voltage balancing strategy includes, the central controller regularly or periodically monitors the DC voltage of each power sub-module and sorts it, and turns on the lower tubes of the first M modules with high voltage values in the upper and lower bridge arms, where M<N, M and N are positive integers, so that at any time, 2 (N-M) DC power capacitors Csmi in the MMC bridge arm are charged; the remaining 2M DC power capacitors Csmi are not charged; this cycle is repeated regularly to achieve dynamic balance of each DC power capacitor Csmi.
可选的，取电电路还包括取电控制器，取电控制器接收中央控制器的指令，控制第一开关S1和第二开关的状态；每个功率子模块还包括子模块控制器，所述子模块控制器接收中央控制器的指令，控制功率子模块内的上功率管和下功率管的状态。Optionally, the power supply circuit also includes a power supply controller, which receives instructions from the central controller and controls the states of the first switch S1 and the second switch; each power sub-module also includes a sub-module controller, which receives instructions from the central controller and controls the states of the upper power tube and the lower power tube in the power sub-module.
可选的，中央控制器包含实现多重功能的器件，监测和调控功能可通过中央控制器实现，也可通过细分模块实现，例如，中央控制器包括监测模块和调控模块，调控模块与监测模块连接，监测模块与MMC桥臂的每个功率子模块、第一开关S1、第二开关S2、储能电容Cs连接，实时或监测每个功率子模块的输出电压、第一开关S1和第二开关S2的开闭状态、以及储能电容Cs的电压值，并将上述监测参数实时传送给调控模块；调控模块控制第一开关S1和第二开关S2的开闭以及实施电压平衡策略选择与控制电路连接的功率子模块，实现对中央控制器的稳定供电。Optionally, the central controller includes devices that implement multiple functions. The monitoring and control functions can be implemented through the central controller or through subdivided modules. For example, the central controller includes a monitoring module and a control module. The control module is connected to the monitoring module, and the monitoring module is connected to each power sub-module of the MMC bridge arm, the first switch S1, the second switch S2, and the energy storage capacitor Cs. The monitoring module monitors the output voltage of each power sub-module, the opening and closing status of the first switch S1 and the second switch S2, and the voltage value of the energy storage capacitor Cs in real time, and transmits the above-mentioned monitoring parameters to the control module in real time; the control module controls the opening and closing of the first switch S1 and the second switch S2 and implements the voltage balance strategy to select the power sub-module connected to the control circuit to achieve stable power supply to the central controller.
可选的，本发明中，对于阈值和设定值，其根据用户的实际需求自定义设置，本发明实施例对此不进行具体限制。Optionally, in the present invention, the thresholds and set values are customized according to the actual needs of the user, and the embodiments of the present invention do not impose specific limitations on this.
可选的，DC/DC电源为直流电源。Optionally, the DC/DC power supply is a direct current power supply.
第二实施例Second embodiment
如图5所示，本发明还提供了用于MMC型变换器的中央控制器供电系统的供电方法，方法包括以下步骤。As shown in FIG. 5 , the present invention further provides a power supply method for a central controller power supply system of an MMC type converter, and the method includes the following steps.
S101、启动充电，启动前第一开关S1、第二开关S2呈断开状态，当高压侧加电之后电源开始启动，所有功率子模块的直流功率电容Csmi串联充电。S101, start charging. Before starting, the first switch S1 and the second switch S2 are in the disconnected state. When the high-voltage side is powered on, the power supply starts to start, and the DC power capacitors Csmi of all power sub-modules are charged in series.
S102、储能电容充电，当所有功率子模块的直流功率电容Csmi的电压达到设定值后辅助电源Pi工作，并且取电电路通过限流电阻Rs给储能电容Cs充电。S102, charging the energy storage capacitor. When the voltage of the DC power capacitor Csmi of all power sub-modules reaches the set value, the auxiliary power supply Pi works, and the power taking circuit charges the energy storage capacitor Cs through the current limiting resistor Rs.
S103、取电电路供电，当储能电容Cs电压达到阈值后，第一开关S1闭合，DC/DC电源PM1工作给中央控制器供电。S103 , the power supply circuit supplies power. When the voltage of the energy storage capacitor Cs reaches a threshold, the first switch S1 is closed, and the DC/DC power supply PM1 works to supply power to the central controller.
S104、电压平衡并选取供电功率子模块，中央控制器受电工作后，通过实时或定期监测所有功率子模块的直流功率电容的电压，并实施电压平衡策略。S104, voltage balancing and selecting power supply sub-modules. After the central controller is powered on, it monitors the voltage of the DC power capacitors of all power sub-modules in real time or regularly and implements a voltage balancing strategy.
可选的，电压平衡策略包括以下步骤：Optionally, the voltage balancing strategy includes the following steps:
步骤1、中央控制器实时或定期监测每个功率子模块的输出电压并排序。Step 1: The central controller monitors the output voltage of each power submodule in real time or periodically and sorts them.
步骤2、获取每个子桥臂中电压最高的M个模块，并将所有功率子模块的下管导通，其中M＜N/2，M和N为正整数，使得任一时刻MMC桥臂有2M个直流功率电容Csmi投入充电。Step 2: Get the M modules with the highest voltage in each sub-bridge arm, and turn on the lower tubes of all power sub-modules, where M＜N/2, M and N are positive integers, so that at any time, there are 2M DC power capacitors Csmi in the MMC bridge arm to be charged.
步骤3、判定在监测到2M个直流功率电容Csmi低于下限值后，切除2M个功率电容，接入剩余的2(N-M)个直流功率电容充电。Step 3: After determining that 2M DC power capacitors Csmi are below the lower limit, the 2M power capacitors are removed and the remaining 2 (N-M) DC power capacitors are connected for charging.
步骤4、重复执行步骤S1-S3，以此循环往复实现各个直流功率电容Csmi实现动态均衡。Step 4: Repeat steps S1-S3 to achieve dynamic balance of each DC power capacitor Csmi in a cycle.
S105、供电子模块供电，选定供电功率子模块后，调控模块控制闭合第二开关S2，并将选定的功率子模块持续给中央控制器供电。S105 , the power supply submodule supplies power. After the power supply submodule is selected, the control module controls the closing of the second switch S2 , and the selected power submodule continues to supply power to the central controller.
可选的，中央控制器包含实现多重功能的器件，监测和调控功能可通过中央控制器实现，也可通过细分模块实现，例如，中央控制器包括监测模块和调控模块，调控模块与检测模块电讯连接，监测模块实时或定时监测每个功率子模块的输出电压、第一开关S1和第二开关S2的开闭状态、以及储能电容Cs的电压值，并将上述检测参数实时传送给调控模块；调控模块控制第一开关S1和第二开关S2的开闭以及实施电压平衡策略选择与控制电路连接的功率子模块，实现对中央控制器的稳定供电。Optionally, the central controller includes devices that implement multiple functions. The monitoring and control functions can be implemented through the central controller or through subdivided modules. For example, the central controller includes a monitoring module and a control module. The control module is telecommunication-connected to the detection module. The monitoring module monitors the output voltage of each power sub-module, the opening and closing status of the first switch S1 and the second switch S2, and the voltage value of the energy storage capacitor Cs in real time or periodically, and transmits the above detection parameters to the control module in real time; the control module controls the opening and closing of the first switch S1 and the second switch S2 and implements the voltage balancing strategy to select the power sub-module connected to the control circuit, so as to achieve stable power supply to the central controller.
优选的，电压平衡策略包括，中央控制器实时或定期检测每个功率子模块的输出电压并排序，控制切除上桥臂中前M个高电压值的直流功率电容Csmi，以及切除下桥臂中前M个低电压值的直流功率电容Csmi，其中，M＜N/2，M和N为正整数，使得任一时刻MMC桥臂有2(N-M)个直流功率电容Csmi投入充电；剩余2M个直流功率电容Csmi在下一次采样后被投入充电；以此循环往复实现各个直流功率电容Csmi实现动态均衡。Preferably, the voltage balancing strategy includes, the central controller detects the output voltage of each power sub-module in real time or periodically and sorts it, controls the removal of the first M DC power capacitors Csmi with high voltage values in the upper bridge arm, and removes the first M DC power capacitors Csmi with low voltage values in the lower bridge arm, wherein M＜N/2, M and N are positive integers, so that at any moment, 2 (N-M) DC power capacitors Csmi in the MMC bridge arm are put into charging; the remaining 2M DC power capacitors Csmi are put into charging after the next sampling; and this cycle is repeated to achieve dynamic balance of each DC power capacitor Csmi.
优选的，电压平衡策略包括，检测模块实时或定期检测每个功率子模块的输出电压并排序，调控模块切除上桥臂中前M个高电压值的直流功率电容Csmi，以及切除下桥臂中前M个低电压值的直流功率电容Csmi，其中，M＜N/2，M和N为正整数，使得任一时刻MMC桥臂有2(N-M)个直流功率电容Csmi投入充电；剩余2M个直流功率电容Csmi在下一次采样后被投入充电；以此循环往复实现各个直流功率电容Csmi实现动态均衡。Preferably, the voltage balancing strategy includes: a detection module detects and sorts the output voltage of each power sub-module in real time or periodically, and a control module cuts off the first M DC power capacitors Csmi with high voltage values in the upper bridge arm, and cuts off the first M DC power capacitors Csmi with low voltage values in the lower bridge arm, wherein M＜N/2, M and N are positive integers, so that at any time, 2 (N-M) DC power capacitors Csmi in the MMC bridge arm are put into charging; the remaining 2M DC power capacitors Csmi are put into charging after the next sampling; and this cycle is repeated to achieve dynamic balance of each DC power capacitor Csmi.
工作原理working principle
上述系统和方法的作用是MMC桥臂的一个功率模块取电给中央控制器供电。具体工作原理如下。The function of the above system and method is that a power module of the MMC bridge arm takes power to supply power to the central controller. The specific working principle is as follows.
输入侧的高压直流电压建立后，各个功率子模块的直流功率电容被充电，获得一定直流电压，则所有功率子模块的辅助电源(图4中P1，...，P2N)开始运行，给各个模块的控制器和驱动电路供电，使其能够正常工作。After the high-voltage DC voltage on the input side is established, the DC power capacitors of each power sub-module are charged to obtain a certain DC voltage, and then the auxiliary power supplies of all power sub-modules (P1, ..., P2N in Figure 4) start to operate to supply power to the controllers and drive circuits of each module so that they can work normally.
当模块内辅助电源正常工作之后，取电电路通过限流电阻Rs给储能电容Cs充电，充电功率需要很小，避免模块电容消耗功率不同而造成电容电压较大的不平衡；当储能电容Cs电压达到阈值后，第一开关S1闭合，辅助电源PM1开始工作，给中央控制器供电，中央控制器工作后监测所有功率子模块的直流功率电容电压，并实施电压平衡策略，在此期间，中央控制器仅仅消耗储能电容Cs上存储的电能；当电压平衡策略开始工作后闭合第二开关S2，由对应的功率子模块持续给中央控制器供电。When the auxiliary power supply in the module works normally, the power-taking circuit charges the energy storage capacitor Cs through the current-limiting resistor Rs. The charging power needs to be very small to avoid a large imbalance in capacitor voltage due to different power consumption of module capacitors. When the voltage of the energy storage capacitor Cs reaches the threshold, the first switch S1 is closed, and the auxiliary power supply PM1 starts working to supply power to the central controller. After the central controller starts working, it monitors the DC power capacitor voltages of all power sub-modules and implements a voltage balancing strategy. During this period, the central controller only consumes the electric energy stored in the energy storage capacitor Cs. When the voltage balancing strategy starts working, the second switch S2 is closed, and the corresponding power sub-module continues to supply power to the central controller.
由于中央控制器仅从其中一个功率子模块的直流功率电容取电，因此，辅助供电系统需要采用一定的控制策略以稳定各个功率模块的电容电压。Since the central controller only draws power from the DC power capacitor of one of the power sub-modules, the auxiliary power supply system needs to adopt a certain control strategy to stabilize the capacitor voltage of each power module.
在半桥功率子模块中，当主电路的两个开关管均断开时，电流通过上管的二极管给电容充电，功率子模块的直流功率电容被串入主电路；当上管关断、下管闭合时，功率子模块的直流功率电容从主电路切除。因此，被投入的直流电容会被充电，电容电压上升。对于被切除的直流功率电容，其后级的辅助供电持续消耗电能，因此电容电压下降。In the half-bridge power submodule, when both switch tubes of the main circuit are disconnected, the current charges the capacitor through the diode of the upper tube, and the DC power capacitor of the power submodule is connected in series to the main circuit; when the upper tube is turned off and the lower tube is closed, the DC power capacitor of the power submodule is cut off from the main circuit. Therefore, the DC capacitor that is put in will be charged and the capacitor voltage will rise. For the DC power capacitor that is cut off, the auxiliary power supply of the subsequent stage continues to consume electrical energy, so the capacitor voltage drops.
利用这一特点，可令直流功率电容交替投入，实现所有直流功率电容的均压。其中一种控制方式如下。假设变换器的上桥臂有N个功率子模块，直流电容电压为V1～VN；下桥臂有N个功率模块，直流电容电压为VN+1～V2N。对各个功率子模块直流功率电容的电压进行定期采样。获得电压采样结果之后，排序上桥臂的所有直流功率电容电压V1～VN，将电压最高的M个直流电容(M一般小于N/2)切除。同样原理，切除下桥臂中电压最低的M个直流功率电容。在每次电压采样后，重新对电容电压排序，并投入各桥臂中电压较低的N/2个直流功率电容。By utilizing this feature, the DC power capacitors can be put into operation alternately to realize voltage balancing of all DC power capacitors. One of the control methods is as follows. Assume that the upper bridge arm of the converter has N power sub-modules, and the DC capacitor voltage is V1~VN; the lower bridge arm has N power modules, and the DC capacitor voltage is VN+1~V2N. The voltage of the DC power capacitor of each power sub-module is sampled regularly. After obtaining the voltage sampling results, all the DC power capacitor voltages V1~VN of the upper bridge arm are sorted, and the M DC capacitors with the highest voltage (M is generally less than N/2) are removed. In the same principle, the M DC power capacitors with the lowest voltage in the lower bridge arm are removed. After each voltage sampling, the capacitor voltages are re-sorted, and the N/2 DC power capacitors with lower voltages in each bridge arm are put into operation.
忽略功率开关的动作过程，在任一时刻，上桥臂和下桥臂均有N-M个直流功率电容被投入，这些电容被充电，电压上升。而各个桥臂其余的M个直流功率电容电压下降，电压较低者将在下一次电压采样后被投入充电，最终各个直流功率电容电压可实现动态均衡。若输入高压为Vi，上下桥臂共有2N-2M个直流功率电容被投入，则每个直流功率电容的电压值约为Vi/(2N-2M)。Ignoring the action process of the power switch, at any moment, N-M DC power capacitors are put into the upper and lower bridge arms, these capacitors are charged, and the voltage rises. The voltage of the remaining M DC power capacitors in each bridge arm drops, and the ones with lower voltage will be charged after the next voltage sampling, and finally the voltage of each DC power capacitor can achieve dynamic balance. If the input high voltage is Vi, there are 2N-2M DC power capacitors put into the upper and lower bridge arms, and the voltage value of each DC power capacitor is approximately Vi/(2N-2M).
综上所述，本发明一种用于MMC型变换器的中央控制器供电系统和方法，可实现中央控制器完全从原边取电，降低了对辅助电源的隔离电压的要求；启动过程无需主电路完全工作，减少储能电容的容量；只需要输入侧建立高压直流电压，所有的辅助电源就能启动，模块控制器和中央控制器能正常工作，控制部分在负载短路故障后仍然可以正常工作，仍可通过通信与外界保持联系。In summary, the central controller power supply system and method for an MMC type converter of the present invention can realize that the central controller completely draws power from the primary side, reducing the requirement for the isolation voltage of the auxiliary power supply; the startup process does not require the main circuit to work completely, reducing the capacity of the energy storage capacitor; only a high-voltage DC voltage needs to be established on the input side, all auxiliary power supplies can be started, the module controller and the central controller can work normally, the control part can still work normally after a load short-circuit fault, and can still maintain contact with the outside world through communication.
需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个......”限定的要素，并不排除在包括所述要素的过程、方法、商品或者设备中还存在另外的相同要素。It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.
本领域技术人员应明白，本申请的实施例可提供为方法、装置、系统或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, devices, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110824356.7ACN113556041B (en) | 2021-07-21 | 2021-07-21 | A central controller power supply system and power supply method for MMC type converter |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110824356.7ACN113556041B (en) | 2021-07-21 | 2021-07-21 | A central controller power supply system and power supply method for MMC type converter |
| Publication Number | Publication Date |
|---|---|
| CN113556041A CN113556041A (en) | 2021-10-26 |
| CN113556041Btrue CN113556041B (en) | 2024-07-23 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110824356.7AActiveCN113556041B (en) | 2021-07-21 | 2021-07-21 | A central controller power supply system and power supply method for MMC type converter |
| Country | Link |
|---|---|
| CN (1) | CN113556041B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138589A (en)* | 2011-11-22 | 2013-06-05 | Abb技术有限公司 | Converter operating method and switch units and converter |
| CN110556852A (en)* | 2019-09-29 | 2019-12-10 | 东北大学 | distributed energy storage system based on SOC dynamic balance submodule retrieval and control method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102600766B1 (en)* | 2016-09-22 | 2023-11-13 | 엘에스일렉트릭(주) | Modular multi-level converter |
| CN112134455B (en)* | 2020-09-25 | 2024-07-19 | 浙江大学 | Multi-module series converter self-powered circuit with self-voltage equalization capability and control method thereof |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138589A (en)* | 2011-11-22 | 2013-06-05 | Abb技术有限公司 | Converter operating method and switch units and converter |
| CN110556852A (en)* | 2019-09-29 | 2019-12-10 | 东北大学 | distributed energy storage system based on SOC dynamic balance submodule retrieval and control method |
| Publication number | Publication date |
|---|---|
| CN113556041A (en) | 2021-10-26 |
| Publication | Publication Date | Title |
|---|---|---|
| CN105356731A (en) | Submodule triggering methods for high-voltage direct-current transmission system of modular multilevel converter | |
| CN103187785B (en) | A kind of UPS module and ups system | |
| CN112448572B (en) | Charging method and charging control device for direct-current side short circuit of hybrid converter | |
| CN118281831A (en) | Direct-current direct-hanging energy storage system and control method thereof | |
| CN105337328A (en) | Charging circuit and system for rechargeable battery | |
| CN102891617A (en) | Passive voltage-equalizing control circuit | |
| CN105680681B (en) | Clamping type single submodule-based starting method of modular multilevel converter | |
| CN104993520A (en) | Frequency converter low-voltage ride-through (LVRT) supporting apparatus based on super capacitor | |
| CN216216500U (en) | Driving circuit of thyristor and hydrogen production power supply | |
| CN103187788A (en) | Nematic powered UPS module and UPS system | |
| WO2025176017A1 (en) | Grid-connected power converter and power supply system | |
| CN113556041B (en) | A central controller power supply system and power supply method for MMC type converter | |
| CN115514237B (en) | A low-loss standby method for energy router | |
| CN115296521B (en) | Soft start control method based on three-phase hybrid multi-level converter | |
| CN108494229B (en) | A universal AC/DC power router topology and control method thereof | |
| CN113572362B (en) | A voltage equalizing capacitor regulator for input series structure and its control method | |
| CN215871173U (en) | Overvoltage relief device of common high-frequency bus converter | |
| CN214045432U (en) | A soft start circuit and power supply circuit | |
| CN114336953B (en) | A control method, central controller and energy router for an energy router | |
| CN211351704U (en) | DC energy consumers | |
| CN114844368A (en) | Direct-current transformer and low-voltage bidirectional fault current suppression method | |
| CN105337325B (en) | A kind of UPS circuit | |
| CN208508602U (en) | A kind of contactor coil power supply system for high-power inverter | |
| CN114785157A (en) | An AC-DC-AC converter for on-line UPS and its control method | |
| CN111277002A (en) | Flexible excitation power unit parallel topology structure and control method thereof |
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |