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随着我国核电的快速发展,核电装机不断增加。但是目前我国核电机组由于各种原因,始终是以基本负荷模式运行,不参与电网调频,这对电网频率的控制带来了巨大冲击。针对此问题,以大亚湾核电站为研究对象,对核电机组参与电网一次调频的可行性进行了研究。建立了压水堆核电机组全电厂的非线性时变动态模型,用FORTRAN语言编写了动态计算程序。然后把动态计算程序编译为动态链接库文件,并通过以S函数的方式接入Matlab/Simulink仿真平台,在Matlab/Simulink中进行了核电机组一次调频仿真平台搭建和一次调频动态仿真。仿真结果表明,在目前核电机组的设计下,核电机组从安全性和经济性上可以参与电网一次调频。
With the rapid development of nuclear power in our country, the installed capacity of nuclear power continues to increase. However, at present, due to various reasons, China’s nuclear power generation units are always operating in basic load mode and do not participate in power system frequency regulation, which has brought tremendous impact on the control of power network frequency. In response to this problem, taking Daya Bay Nuclear Power Station as the research object, the feasibility of the nuclear power unit participating in the primary frequency regulation of the power grid was studied. The nonlinear time-varying dynamic model of PWR nuclear power plant is established. The dynamic calculation program is written in FORTRAN language. Then, the dynamic calculation program is compiled into a dynamic link library file, and the Matlab / Simulink simulation platform is accessed through the S function, and a primary frequency modulation simulation platform and a primary frequency modulation dynamic simulation of the nuclear power unit are carried out in Matlab / Simulink. The simulation results show that under the current design of nuclear power plants, nuclear power units can participate in the primary frequency regulation of the power grid in terms of safety and economy.