技术领域technical field
本发明属于火电机组自动控制技术领域，具体涉及一种火电机组顺序控制系统自动剔除故障的方法。The invention belongs to the technical field of automatic control of thermal power units, and in particular relates to a method for automatically eliminating faults in a sequence control system of thermal power units.
背景技术Background technique
火电机组顺序控制系统是火电机组控制系统的重要组成部分，火电机组顺序控制系统是按照预先设定的顺序向对应的目标设备发出控制指令，从而能按照预先设定的步骤自动依次完成对现场多个设备的操作，以减少运行人员的劳动强度。中国专利文献 CN103823401A 是本发明的背景技术文献。The sequence control system of thermal power units is an important part of the control system of thermal power units. The sequence control system of thermal power units sends control instructions to the corresponding target equipment in accordance with the preset sequence, so that it can automatically complete the multi-site monitoring in sequence according to the preset steps. The operation of each device can reduce the labor intensity of the operators. Chinese patent document CN103823401A is the background technology document of the present invention.
但是，现有技术的火电机组顺序控制系统在向某一个目标设备发出控制指令后，若在预设时间内未能收到该目标设备正确的反馈信号，则火电机组顺序控制系统将停止运行，不再执行后续控制指令。由于现场运行环境恶劣，火电机组经常会发生设备故障或信号故障。设备故障是指火电机组控制系统向目标设备发出控制指令后，目标设备发生故障而无法执行指令；信号故障是指火电机组控制系统向目标设备发出控制指令后，目标设备实际上已经执行指令，但反馈信号没有送回。这些故障发生后，都将导致火电机组顺序控制系统无法正常运行。近年来，以APS（英文“automatic plant startup and shutdown control system”的缩写，中文译文为“火电机组自动启停控制系统”）为代表的火电机组顺序控制系统正在广泛应用，而设备故障或信号故障的经常发生，导致火电机组顺序控制系统无法正常运行，极大的降低了火电机组顺序控制系统的可用率，极大的增加了火电机组运行人员的劳动强度。However, if the thermal power unit sequential control system of the prior art fails to receive a correct feedback signal from the target device within a preset time after sending a control command to a certain target device, the thermal power unit sequential control system will stop running. Subsequent control commands are no longer executed. Due to the harsh operating environment on site, thermal power units often experience equipment failures or signal failures. Equipment failure means that after the control system of the thermal power unit sends a control command to the target device, the target device fails to execute the command; signal failure means that after the control system of the thermal power unit sends a control command to the target device, the target device actually executes the command Feedback signal is not sent back. After these failures occur, the sequence control system of the thermal power unit will not work normally. In recent years, the sequence control system of thermal power units represented by APS (abbreviation of English "automatic plant startup and shutdown control system", Chinese translation is "thermal power unit automatic start-stop control system") is being widely used, and equipment failure or signal failure The frequent occurrence of the thermal power unit sequence control system causes the thermal power unit sequence control system to fail to operate normally, which greatly reduces the availability of the thermal power unit sequence control system and greatly increases the labor intensity of the thermal power unit operators.
发明内容Contents of the invention
本发明要解决的技术问题就在于：针对现有技术存在的缺陷，提供一种能够在火电机组顺序控制系统运行中，自动剔除大部分设备故障和信号故障，继续执行后续步骤，有效提高火电机组顺序控制系统可用率，切实降低运行人员劳动强度的火电机组顺序控制系统自动剔除故障的方法。The technical problem to be solved by the present invention is to provide a method that can automatically eliminate most of the equipment failures and signal failures during the operation of the sequence control system of the thermal power unit, and continue to perform subsequent steps, effectively improving the efficiency of the thermal power unit. The availability rate of the sequence control system, which effectively reduces the labor intensity of the operating personnel, is a method for automatically eliminating faults in the sequence control system of thermal power units.
为解决上述技术问题，本发明提出的技术方案为：火电机组顺序控制系统自动剔除故障的方法，包括下述步骤：In order to solve the above-mentioned technical problems, the technical solution proposed by the present invention is: the method for automatically eliminating faults in the sequential control system of thermal power units, comprising the following steps:
1）火电机组顺序控制系统向目标设备发出控制指令；1) The sequential control system of the thermal power unit sends control commands to the target equipment;
2）所述火电机组顺序控制系统判断目标设备是否发生故障，若发生故障，则执行步骤3）；若没有发生故障，则火电机组顺序控制系统跳转到步骤1）按照预先设定的顺序继续执行后续的控制指令；2) The sequence control system of the thermal power unit judges whether the target equipment is faulty, and if a fault occurs, execute step 3); if no fault occurs, the sequential control system of the thermal power unit jumps to step 1) and continues according to the preset sequence Execute subsequent control instructions;
3）所述火电机组顺序控制系统根据目标设备的运行状态参数的变化情况，判断所述目标设备发生故障的故障类型为设备故障或信号故障；3) The sequence control system of the thermal power unit judges that the failure type of the target equipment is an equipment failure or a signal failure according to the change of the operating state parameters of the target equipment;
4）所述火电机组顺序控制系统根据所述故障类型剔除故障：当所述故障类型为设备故障时，则火电机组顺序控制系统停止执行目标设备的当前控制指令；当所述故障类型为信号故障时，则火电机组顺序控制系统跳转到步骤1）按照预先设定的顺序继续执行后续的控制指令。4) The thermal power unit sequence control system eliminates faults according to the fault type: when the fault type is an equipment fault, the thermal power unit sequence control system stops executing the current control instruction of the target device; when the fault type is a signal fault , the sequential control system of the thermal power unit jumps to step 1) and continues to execute the subsequent control commands according to the preset sequence.
进一步地，所述步骤2）中判断目标设备是否发生故障的步骤包括：所述火电机组顺序控制系统向目标设备发出控制指令后，若在预设的反馈信号等待时间t之内未收到目标设备的正确反馈信号，则判断目标设备发生故障；若在预设的反馈信号等待时间t之内收到目标设备的正确反馈信号，则判断目标设备未发生故障。Further, the step of judging whether the target equipment fails in the step 2) includes: after the sequential control system of the thermal power unit sends a control command to the target equipment, if the target equipment is not received within the preset feedback signal waiting time t If the correct feedback signal of the target device is received, it is judged that the target device is faulty; if the correct feedback signal of the target device is received within the preset feedback signal waiting time t, it is judged that the target device is not faulty.
进一步地，所述步骤3）中判断目标设备发生故障的故障类型为设备故障或信号故障的步骤包括：所述火电机组顺序控制系统读取所述目标设备与所述控制指令对应的运行状态参数的当前值和控制指令发出前的值，并计算所述运行状态参数值的变化量，若所述运行状态参数值的变化量未超出预设阈值，则判断所述目标设备发生故障的故障类型为设备故障，否则判断所述目标设备发生故障的故障类型为信号故障。Further, in the step 3), the step of judging that the failure type of the target equipment is equipment failure or signal failure includes: the sequence control system of the thermal power unit reads the operating state parameters of the target equipment corresponding to the control instructions The current value of the current value and the value before the control instruction is issued, and calculate the variation of the operating state parameter value, if the variation of the operating state parameter value does not exceed the preset threshold value, then determine the type of failure of the target device Otherwise, it is determined that the fault type of the target device is a signal fault.
进一步地，所述步骤4）中火电机组顺序控制系统停止执行目标设备的当前控制指令时还包括检查备用设备的步骤，具体步骤包括：火电机组顺序控制系统停止执行目标设备的当前控制指令后，检查目标设备是否有可用的备用设备，如果目标设备有可用的备用设备，则向该备用设备转发当前控制指令，跳转到步骤2）；如果目标设备无可用的备用设备，则火电机组顺序控制系统停止运行，不再执行后续控制指令。Further, when the sequential control system of the thermal power unit stops executing the current control instruction of the target equipment in the step 4), the step of checking the backup equipment is also included. The specific steps include: after the sequential control system of the thermal power unit stops executing the current control instruction of the target equipment, Check whether the target device has an available backup device, if the target device has an available backup device, forward the current control command to the backup device, and jump to step 2); if the target device has no available backup device, the sequence control of the thermal power unit The system stops running and does not execute subsequent control instructions.
进一步地，所述步骤4）中当所述故障类型为设备故障时，还包括火电机组顺序控制系统发出设备故障警报信号的步骤。Further, in step 4), when the failure type is equipment failure, the step of sending out an equipment failure alarm signal by the sequence control system of the thermal power unit is also included.
进一步地，所述步骤4）中当所述故障类型为信号故障时，还包括火电机组顺序控制系统发出信号故障警报信号的步骤。Further, in the step 4), when the failure type is a signal failure, the sequence control system of the thermal power unit further includes the step of sending a signal failure alarm signal.
与现有技术相比，本发明的优点在于：在火电机组顺序控制系统运行过程中，遇到设备故障或信号故障时，能够自动剔除大部分故障，继续执行后续步骤。应用本发明，可有效提高火电机组顺序控制系统的可用率，切实降低运行人员的劳动强度。Compared with the prior art, the present invention has the advantage that: during the operation of the sequence control system of thermal power units, when encountering equipment failure or signal failure, most of the failures can be automatically eliminated, and the subsequent steps can be continued. The application of the invention can effectively improve the availability rate of the sequential control system of the thermal power unit, and effectively reduce the labor intensity of the operators.
附图说明Description of drawings
图1为本发明实施例的流程示意图。Fig. 1 is a schematic flow chart of an embodiment of the present invention.
具体实施方式Detailed ways
以下结合具体实施例和图1对本发明作进一步描述，但并不因此而限制本发明的保护范围。在火电机组顺序控制系统中，对火电机组各设备的运行状态参数都有连续的状态监测，能够准确反映火电机组各设备实时的运行状态。本实施例中，以火电机组A引风机#1润滑油泵（下文简称为#1润滑油泵）为火电机组顺序控制系统按照设定的顺序在当前需要执行的控制指令所对应的目标设备。The present invention will be further described below in conjunction with specific embodiments and FIG. 1 , but the protection scope of the present invention is not limited thereby. In the sequential control system of the thermal power unit, there is continuous state monitoring of the operating state parameters of each equipment of the thermal power unit, which can accurately reflect the real-time operating status of each equipment of the thermal power unit. In this embodiment, the thermal power unit A induced draft fan #1 lubricating oil pump (hereinafter referred to as #1 lubricating oil pump) is used as the target device corresponding to the control instructions that the thermal power unit sequence control system needs to execute currently according to the set sequence.
本发明实施例火电机组顺序控制系统自动剔除故障的方法的实施步骤如下：The implementation steps of the method for automatically eliminating faults in the sequential control system of thermal power units in the embodiment of the present invention are as follows:
1）火电机组顺序控制系统向目标设备发出控制指令；1) The sequential control system of the thermal power unit sends control commands to the target equipment;
2）火电机组顺序控制系统判断目标设备是否发生故障，若发生故障，则执行步骤3）；若没有发生故障，则火电机组顺序控制系统跳转到步骤1）按照预先设定的顺序继续执行后续的控制指令；2) The sequential control system of the thermal power unit judges whether the target equipment is faulty, and if a fault occurs, execute step 3); if there is no fault, the sequential control system of the thermal power unit jumps to step 1) and continues to execute the follow-up according to the preset sequence control instructions;
3）火电机组顺序控制系统根据目标设备的运行状态参数的变化情况，判断目标设备发生故障的故障类型为设备故障或信号故障；3) The sequence control system of the thermal power unit judges that the failure type of the target equipment is equipment failure or signal failure according to the change of the operating state parameters of the target equipment;
4）火电机组顺序控制系统根据故障类型剔除故障：当故障类型为设备故障时，则火电机组顺序控制系统停止执行当前控制指令；当故障类型为信号故障时，则火电机组顺序控制系统跳转到步骤1）按照预先设定的顺序继续执行后续的控制指令。4) The thermal power unit sequence control system eliminates faults according to the fault type: when the fault type is equipment failure, the thermal power unit sequence control system stops executing the current control command; when the fault type is a signal fault, the thermal power unit sequence control system jumps to Step 1) Continue to execute the subsequent control instructions according to the preset order.
本实施例中，步骤1）火电机组顺序控制系统向#1润滑油泵发出启动指令。In this embodiment, step 1) the sequence control system of the thermal power unit sends a starting command to the #1 lubricating oil pump.
本实施例中以#1润滑油泵为目标设备、向#1润滑油泵发出具体为启动指令的控制指令为例，步骤2）判断#1润滑油泵是否发生故障的步骤包括：火电机组顺序控制系统向#1润滑油泵发出启动指令后，火电机组控制系统若在30秒之内未收到#1润滑油泵“已启动”的反馈信号，则判断#1润滑油泵发生故障，跳转到步骤3）；火电机组控制系统若在30秒之内收到#1润滑油泵“已启动”的反馈信号，则判断#1润滑油泵没有发生故障，火电机组顺序控制系统跳转到步骤1）按照预先设定的顺序继续执行后续的控制指令。需要说明的是，本实施例中针对#1润滑油泵预设的反馈信号等待时间t为30秒，但是预设的反馈信号等待时间t的取值是和具体的设备相关的，其取值可根据不同的设备的响应时间及其它因素影响的情况预设不同的值。In this embodiment, taking #1 lubricating oil pump as the target equipment and issuing a control command specifically to start the command to #1 lubricating oil pump as an example, step 2) the step of judging whether #1 lubricating oil pump fails includes: After the #1 lubricating oil pump sends out the start command, if the thermal power unit control system does not receive the #1 lubricating oil pump "started" feedback signal within 30 seconds, it will be judged that the #1 lubricating oil pump is faulty and skip to step 3); If the thermal power unit control system receives the #1 lubricating oil pump "started" feedback signal within 30 seconds, it will judge that the #1 lubricating oil pump has not failed, and the thermal power unit sequence control system will jump to step 1) according to the preset The sequence continues with subsequent control instructions. It should be noted that the preset feedback signal waiting time t for #1 lubricating oil pump in this embodiment is 30 seconds, but the value of the preset feedback signal waiting time t is related to specific equipment, and its value can be Different values are preset according to the response time of different devices and other factors.
本实施例中，目标设备#1润滑油泵的启动指令对应的运行状态参数为火电机组A引风机润滑油母管压力值（以下简称润滑油母管压力值），步骤3）判断#1润滑油泵发生故障的故障类型为设备故障或信号故障的步骤包括：火电机组顺序控制系统在判断#1润滑油泵发生故障后，火电机组顺序控制系统读取润滑油母管压力值的当前值与控制指令发出前的值，并计算出润滑油母管压力值的变化量，若该变化量未超出预设阈值，则判断#1润滑油泵发生故障的故障类型为设备故障，否则判断#1润滑油泵发生故障的故障类型为信号故障。In this embodiment, the operating state parameter corresponding to the starting command of the target equipment #1 lubricating oil pump is the pressure value of the lubricating oil main pipe of the induced draft fan of the thermal power unit A (hereinafter referred to as the lubricating oil main pipe pressure value), step 3) judge #1 lubricating oil pump The steps in which the failure type is equipment failure or signal failure include: After the sequence control system of the thermal power unit judges that the #1 lubricating oil pump has failed, the sequence control system of the thermal power unit reads the current value of the pressure value of the lubricating oil main pipe and sends out a control command If the change does not exceed the preset threshold value, it is judged that the failure type of #1 lubricating oil pump is equipment failure, otherwise it is judged that #1 lubricating oil pump is faulty The failure type of is signal failure.
例如本实施例中，润滑油母管压力值的预设阈值为0.1MPa，润滑油母管压力在控制指令发出前的值为0MPa，若润滑油母管压力值的当前值为0.2MPa，则润滑油母管压力值的变化量为|0.2-0|=0.2MPa，而润滑油母管压力值的变化量0.2MPa超过预设阈值0.1MPa，则说明该#1润滑油泵实际已经执行了火电机组顺序控制系统发出的启动指令，判断为该#1润滑油泵发生故障的故障类型为信号故障；若润滑油母管压力值的当前值为0.01MPa，则润滑油母管压力值的变化量为|0.01-0|=0.01MPa，则润滑油母管压力值的变化量0.01MPa 没有超过预设阈值0.1MPa，则说明该#1润滑油泵没有执行火电机组顺序控制系统发出的启动指令，判断该#1润滑油泵发生故障的故障类型为设备故障。需要说明的是，运行状态参数的变化量既可以是运行状态参数的当前值、控制指令发出前的值之间的差值，也可以是运行状态参数的当前值、控制指令发出前的值之间的差值除以运行状态参数的当前值或者控制指令发出前的值得到的比值，此外还可以根据需要采用其他能够体现运行状态参数变化信息的变化量；毫无疑问，运行状态参数的变化量对应的预设阈值也因为运行状态参数的变化量的具体取值方式不同而不同，运行状态参数的预设阈值也因设备的不同而不同，针对不同的设备及不同的控制指令，有与之对应的反映设备运行状态的参数和与之对应的运行状态参数变化量的预设阈值，例如对于鼓风机启动指令而言，对应的运行状态参数可为鼓风机的转速，对应的预设阈值可为100转/秒。For example, in this embodiment, the preset threshold value of the lubricating oil main pipe pressure value is 0.1MPa, and the value of the lubricating oil main pipe pressure value before the control command is issued is 0MPa. If the current value of the lubricating oil main pipe pressure value is 0.2MPa, then The variation of the pressure value of the lubricating oil main pipe is |0.2-0|=0.2MPa, and the variation of the lubricating oil main pipe pressure value of 0.2MPa exceeds the preset threshold of 0.1MPa, which means that the #1 lubricating oil pump has actually implemented thermal power The starting command issued by the sequence control system of the unit judges that the failure type of the #1 lubricating oil pump is a signal failure; if the current value of the pressure value of the lubricating oil main pipe is 0.01MPa, the change in the pressure value of the lubricating oil main pipe is |0.01-0|=0.01MPa, then the variation of the lubricating oil main pipe pressure value of 0.01MPa does not exceed the preset threshold of 0.1MPa, which means that the #1 lubricating oil pump did not execute the start command issued by the sequence control system of the thermal power unit. The failure type of #1 lubricating oil pump failure is equipment failure. It should be noted that the variation of the running state parameter can be the difference between the current value of the running state parameter and the value before the control command is issued, or the difference between the current value of the running state parameter and the value before the control command is issued. The ratio obtained by dividing the difference between the operating state parameters by the current value of the operating state parameter or the value before the control command is issued, and other changes that can reflect the change information of the operating state parameters can also be used as required; there is no doubt that the change of the operating state parameters The preset threshold value corresponding to the variable is also different because of the specific value selection method of the change amount of the operating state parameter. The preset threshold value of the operating state parameter is also different due to different devices. For different devices and different control commands, there are different The corresponding parameter reflecting the operating state of the equipment and the corresponding preset threshold value of the variation of the operating state parameter. For example, for the blower start command, the corresponding operating state parameter can be the speed of the blower, and the corresponding preset threshold value can be 100 revolutions/second.
本实施例中，步骤4）根据故障类型剔除故障的步骤包括：当火电机组顺序控制系统判断#1润滑油泵发生设备故障时，火电机组顺序控制系统停止向#1润滑油泵发出控制指令，同时检查该#1润滑油泵是否有可用的备用设备，如果该#1润滑油泵有可用的备用设备（#2润滑油泵），则向该备用设备转发当前控制指令，本实施例中#2润滑油泵是#1润滑油泵的备用设备，因此向#2润滑油泵转发当前控制指令（对#1润滑油泵的启动指令），跳转到步骤2）；如果该#1润滑油泵没有备用设备，则火电机组顺序控制系统停止运行，不再执行后续控制指令。需要说明的是，火电机组顺序控制系统可通过DCS逻辑编程方法，对每一个目标设备预置一个与其关联的备用设备信息，并能够在线监测目标设备及其关联的备用设备的运行状态参数信息，例如对于本实施例中的#1润滑油泵而言，火电机组顺序控制系统预置了#1润滑油泵关联的#2润滑油泵信息，并可以在线监测#1润滑油泵、#2润滑油泵的运行状态参数信息，因此当#1润滑油泵发生设备故障时，即可向关联的备用设备#2润滑油泵转发当前控制指令。In this embodiment, step 4) the step of eliminating faults according to the fault type includes: when the sequence control system of the thermal power unit judges that #1 lubricating oil pump has an equipment failure, the sequential control system of the thermal power unit stops sending control commands to the #1 lubricating oil pump, and checks at the same time Whether the #1 lubricating oil pump has an available spare equipment, if the #1 lubricating oil pump has an available spare equipment (#2 lubricating oil pump), then forward the current control command to the spare equipment, #2 lubricating oil pump in this embodiment is# 1 lubricating oil pump backup equipment, so forward the current control command to #2 lubricating oil pump (starting command to #1 lubricating oil pump), jump to step 2); if the #1 lubricating oil pump has no backup equipment, thermal power unit sequential control The system stops running and does not execute subsequent control instructions. It should be noted that the thermal power unit sequence control system can preset a backup device information associated with each target device through the DCS logic programming method, and can monitor the operating status parameter information of the target device and its associated backup device online. For example, for the #1 lubricating oil pump in this embodiment, the sequence control system of the thermal power unit presets the #2 lubricating oil pump information associated with the #1 lubricating oil pump, and can monitor the operating status of the #1 lubricating oil pump and #2 lubricating oil pump online parameter information, so when the #1 lubricating oil pump fails, the current control command can be forwarded to the associated backup equipment #2 lubricating oil pump.
本实施例中，步骤4）中当所述故障类型为设备故障时，还包括火电机组顺序控制系统发出设备故障警报信号的步骤，以提醒运行人员#1润滑油泵发生设备故障；当所述故障类型为信号故障时，还包括火电机组顺序控制系统发出信号故障警报信号的步骤，以提醒运行人员#1润滑油泵发生信号故障。当火电机组顺序控制系统判断该#1润滑油泵发生信号故障时，因该#1润滑油泵没有发生设备故障，能够执行火电机组顺序控制系统发出的控制指令，火电机组顺序控制系统发出该#1润滑油泵发生信号故障的警报信号，提醒运行人员该#1润滑油泵发生信号故障后，火电机组顺序控制系统继续执行后续控制指令。In this embodiment, when the failure type in step 4) is an equipment failure, it also includes the step of sending an equipment failure alarm signal from the sequence control system of the thermal power unit to remind the operator that #1 lubricating oil pump has an equipment failure; when the failure When the type is a signal failure, it also includes the step of sending a signal failure alarm signal by the sequence control system of the thermal power unit to remind the operator that the #1 lubricating oil pump has a signal failure. When the thermal power unit sequence control system judges that the #1 lubricating oil pump has a signal failure, since the #1 lubricating oil pump has no equipment failure, it can execute the control command issued by the thermal power unit sequence control system, and the thermal power unit sequence control system sends the #1 lubricating oil pump The alarm signal of signal failure of the oil pump reminds the operator that after the #1 lubricating oil pump has a signal failure, the sequential control system of the thermal power unit continues to execute subsequent control instructions.
在本实施例中，火电机组顺序控制系统在#1润滑油泵发生设备故障且有可用的备用设备时，或者是发生信号故障时，能够发出对应的故障警报信号并自动剔除故障，保证火电机组顺序控制系统正常运行，从而有效提高了火电机组顺序控制系统的可用率，切实降低了运行人员的劳动强度。In this embodiment, when the #1 lubricating oil pump has an equipment failure and there is an available backup equipment, or when a signal failure occurs, the sequence control system of the thermal power unit can send out a corresponding fault alarm signal and automatically eliminate the fault, ensuring the sequence of the thermal power unit The normal operation of the control system effectively improves the availability of the sequential control system of the thermal power unit and effectively reduces the labor intensity of the operators.
上述只是本发明的较佳实施例，并非对本发明作任何形式上的限制。虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明。因此，凡是未脱离本发明技术方案的内容，依据本发明技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均应落在本发明技术方案保护的范围内。The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201510054735.7ACN104597898B (en) | 2015-02-03 | 2015-02-03 | The Method of Automatically Eliminating Faults in the Sequence Control System of Thermal Power Units |
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| CN201510054735.7ACN104597898B (en) | 2015-02-03 | 2015-02-03 | The Method of Automatically Eliminating Faults in the Sequence Control System of Thermal Power Units |
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| CN201510054735.7AActiveCN104597898B (en) | 2015-02-03 | 2015-02-03 | The Method of Automatically Eliminating Faults in the Sequence Control System of Thermal Power Units |
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