Simulation Research and Optimal Design for Digital Power Regulating System of China Advanced Research Reactor

Based on SimPort simulation platform of nuclear power plant,a simulation model for Digital Power Regulating System（DPRS） of China Advanced Research Reactor（CARR） was established.The transient state of DPRS was simulation studied using this model.According to the characteristics of the driving mechanism of the control rods,the effects of the driving precision of the control rod and its displacement delay upon the system stability were analyzed.Considering the process requirements of CARR and the function characteristic of DRPS,the adjusting parameters for the digital PID controller and the stability limits of the driving mechanism of the control rods were obtained.The sampling period of the digital PID controller is 100ms and its proportion gain is 300.The stability limit of the driving precision of the control rod is 0.4mm.The stability limit of displacement delay between electromagnetic coil and armature is 6.0mm.