Dynamic Simulations of Primary Frequency Regulation for Pressurized Water Reactor Nuclear Power Generation Units

Along with rapid development of nuclear power in China, installed capacity of nuclear power units is increased unceasingly. Due to various reasons at present the nuclear power units in China are operated in basic-load running mode and do not participate in power grid frequency regulation, and it greatly affects the control of grid frequency. In allusion to this phenomenon, taking the Daya Bay nuclear power plant as research object, the feasibility of nuclear power units participating primary frequency regulation(PFR) of power grid is researched. A nonlinear time-varying dynamic model of overall nuclear power plant composed of pressurized water reactor(PWR) nuclear power units is established, and using FORTRAN language a dynamic calculation software is programmed. Then the dynamic calculation program is compiled as dynamic link library(DLL) files and embedded into Matlab/Simulink simulation platform in the form of S-function, and then in Matlab/Simulink environment a PFR simulation platform of PWR nuclear power units is built, and dynamic simulation of PFR is performed. Simulation results show that under current design of PWR nuclear power units it is feasible for PWR nuclear power units to participate PFR in the viewpoint of economy and security.