A nuclear power plant main pump rotational speed active and standby detection signal processing method and device, rack

Abstract

The invention relates to a primary and standby detection signal processing method and device for a nuclear plant main pump revolving speed and a rack. The primary and standby detection signal processing device is composed of an input module, a transmission module, a control module, a signal processing module and an output module. Independent processing and monitoring of main pump revolving speed primary and standby detection signal processing channel hardware can be realized, interference between main pump revolving speed primary and standby detection signals can be eliminated, the structure is simplified, the fault rate of the rack is reduced, the reliability of the nuclear plant main pump revolving speed rack is improved, and redundant standby is realized on the aspect of hardware processing, i.e., when the processing of one path of signals fails, the other path of signals can be directly used for processing. The primary and standby detection signal processing device adopts simple and independent hardware design, so that primary and standby detection signals are separately managed and controlled, and the defects that traditional primary and standby detection signal common ground connection lines have signal interference and standby detection signals cannot be monitored in real time are overcome.

Description

technical field [0001] The invention relates to a nuclear power plant, and more specifically relates to a method, a device, and a frame for processing main and standby detection signals of main pump speeds of a nuclear power plant. Background technique [0002] The main pump of a nuclear power plant is a very important equipment in a nuclear power plant. It provides kinetic energy to drive the primary circuit coolant to cool the core. Whether the main pump is running well and the speed of the main pump are important parameters for pump operation. In addition, the speed signal participates in many important logics. Therefore, the speed signal of the main pump of the primary circuit is a very important parameter of the nuclear power plant. In the existing nuclear power plant main pump speed rack, according to historical experience, the main pump speed backup signal interferes with the main signal on the rack. When the backup signal is abnormal, the speed signal will work abnor...

AI Technical Summary

Problems solved by technology

In the existing nuclear power plant main pump speed rack, according to historical experience, the main pump speed backup signal interferes with the main signal on the rack. When the backup signal is abnormal, the speed signal will work abnormally. The main reason may be the SPM1 card (Input card) There is a problem in the circuit design or it is caused by the common ground of the main and standby signals before switching

[0003] Secondly, there are too many cards for the speed of the main pump, but very few cards are actually used in the working process. The failure of a single card can easily lead to failure of the speed, and independent monitoring cannot be realized between the main and standby speed signal channels. The current main and standby signals Only one signal can be processed, and the backup signal does not have an independent hardware processing channel, and cannot be monitored. If the rack does not have the problem of main and backup signal interference, when the backup signal fails, the failure of the backup signal cannot be found in time, which may cause As a result, when the main signal is abnormal, it is found that the backup signal has also failed, resulting in the complete loss of monitoring of the main pump speed signal, forcing the unit to stop pumping and shutting down for maintenance

[0004] In addition, since there is no independent hardware processing channel for the main and standby speed signals, when the processing card fails, it will also cause the main pump speed signal to completely lose monitoring, making the main pump speed signal main and backup design functions meaningless

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