Research on TXP Controller PID Parameter Matching of Ling’ao Phase Ⅱ NPP

The reason for the mismatching of the PID parameter and the design value in TXP controller of DCS system in Ling’ao Phase II NPP is analyzed.Taking the pressurizer pressure control system as an example,the effect of the parameter mismatching is described,and the PID parameter matching method is studied based on the open-loop response method.The hot function test and transient test in Ling’ao Phase II NPP shows that this method can match PID parameter with the design value,to get better control performance,shorter startup time of control system and huge economic benefits.