660MW核电机组一次调频实验及动态特性仿真分析

Experiment and Dynamic Characteristics Simulation of Primary Frequency Regulation of a 660 MW Nuclear Power Unit

核电机组与火电机组运行差异较大,目前核电机组对电网频率变化响应的具体数据比较缺乏。为了深入研究660 MW核电机组功率与电网频率变化的动态响应特性,在国内某核电厂3、4号机组进行负荷变化频率差扰动试验,分析机组在实际动作过程中相关参数变化,验证了机组具备在电网小扰动情况下的调节能力。同时,利用MATLAB/Simulink软件建立核电机组一次调频能力的数学模型,通过对核电机组频率动态变化特性的分析,提出了相应的优化方案,为国内同类型核电机组参与电网一次调频提供重要的试验数据支持。

The operation mode of nuclear power units is very different from that of thermal power units,and the specific data on the response of relevant nuclear power units to grid frequency changes are relatively lacking at present.In order to deeply study the dynamic response characteristics of the power and grid frequency changes of the 660 MW nuclear power unit,a perturbation test of load change frequency difference was conducted in units 3 and 4 of a domestic nuclear power plant to analyze the changes of relevant parameters during the actual operation of the unit.We verified that the unit had the regulation capability under small grid perturbations.At the same time,the mathematical model of the primary frequency regulation capability of nuclear power units was established by using MATLAB/Simulink software,and the corresponding optimization scheme was proposed through the analysis of the dynamic change characteristics of nuclear power units,which provide important test data support for the participation of the same type of nuclear power units in the primary frequency regulation of the power grid.