Model reference method for fault diagnosis of instrument control cards in nuclear power plant

Based on the current situation of fault diagnosis of instrument control card, this project constructs the normal and fault reference models of instrument control card by simulation modeling, and proposes a model reference fault diagnosis method based on simulation test. On the basis of PSPICE, the simulation model of the power division card is established. The circuit schematic diagram is verified by Time Domain analysis method, and the validity of model reference method in card fault diagnosis is verified. The TP11 waveform of R29 circuit breaker is simulated by taking the simulation analysis waveform of a certain type of card as the sample, and the fault waveform case base is accumulated. This method lays a foundation for fault simulation diagnosis and data analysis of the card. (authors)