适用于电网稳定分析的大容量核电机组建模

Modeling of Large-Capacity Nuclear Power Unit Suitable for Power Grid Stability Analysis

大容量核电机组的不断投运使电网运行方式发生了变化,并带来了调峰调频困难等新问题,为掌握核电机组的运行特性,迫切需要建立用于电网稳定分析的核电站准确模型。利用Matlab/Simulink建立了大容量压水堆核电机组数学模型,并结合全过程动态仿真软件,分析了核电机组受到扰动的过渡过程,研究了核电机组在电网频率、电压发生波动时的动态特性。仿真结果表明,该模型能够较为准确地反映核电机组在实际电力系统发生扰动后的动态过程,可为深入研究电网与大容量核电机组的相互影响提供技术支持。

Expansion of nuclear power changes power grid operation mode and brings new problems such as difficulty of peak load and frequency regulations. In order to master operation characteristics of nuclear power unit, more accurate modeling suitable for power grid stability analysis is pressing. This paper puts forward a pressurized water reactor nuclear power unit model based on MATLAB/Simulink. By using PSD-FDS（power system department-full dynamic simulation）, this paper analyzes transient process of disturbed nuclear power unit and researches dynamic response to grid frequency and voltage fluctuations. Simulation results show that the model can accurately represent dynamic performance of nuclear power unit after power system disturbance and provide an effective tool for further research on interaction between power grid and large-capacity nuclear power unit.