核电机组对电力系统一次调频性能影响仿真分析

Simulation Analysis on Influence of Nuclear Power Units on Primary Frequency Regulation of Power System

在福建省核电快速发展,装机比例逐年上升的背景下,通过仿真研究了核电机组参与一次调频对电力系统调频性能的影响。从核电调频的研究现状出发,分析现代核电机组的调频控制机理与运行特点,建立了核电机组调速系统控制模型,表明核电机组具有调频能力。以福建省某核电站为研究对象,采用中国电力科学研究院电力系统全过程动态仿真程序进行仿真,针对不同的核电装机比重、参与调频前后的频率变化、调频死区设置、参数优化四个方面分析了核电机组对电力系统调频性能的影响,为核电机组大规模并网后系统一次调频策略的制定提供了理论依据。

With the rapid development and the increasing proportion of installed units of nuclear power in Fujian Province,this paper investigated the influence of nuclear power units(NPUs)participating in primary frequency regulation(PFR)on frequency modulation performance through simulation.Based on the latest research about nuclear frequency regulation,this paper found that NPUs are capable of frequency regulation by analyzing the frequency control mechanism and operation characteristics of modern NPUs and building control model for NPU speed regulation system.Taking a nuclear power plant in Fujian Province as research object,this paper conducted the simulation through the whole-process dynamic simulating program advanced by China Electric Power Research Institute.This paper analyzed the influence of NPUs on frequency regulation performance of power system from four aspects:installed proportion,frequency change through frequency regulation,setting of frequency regulation dead-bands,and parameter optimization.The results provide theoretical basis to formulate PFR strategies after large-scale NPUs are integrated into grid.