电力系统频率在电网中的时空分布特性是人们近年来逐渐认识到的物理现象,而频率是电力系统运行的重要参数之一.因此,研究电力系统频率的动态特性对电网的安全稳定运行具有重要意义.推导了适用于研究电力系统频率时空分布特性的结构保持模型,并通过该模型分析了发电机惯性、负荷特性等因素对电力系统频率动态特性的影响.最后应用该模型对简单的3机9节点测试系统进行仿真分析,验证了本文理论分析及结构保持模型的正确性.%The physical phenomenon of frequency dynamic propagation in form of wave is observed recently in real power systems.Frequency is one of the important parameters in power system operation.It is necessary to study frequency dynamic characteristic of power grids,which has great significance for understanding the dynamic characteristics nature of power systems.The structure preserving model used to study frequency dynamic time-space distribution characteristic is deduced.This model can be used to analyze the effect of generator inertia and power load features on frequency dynamic.Finally,the simulation results based on WSCC 3-machine 9-bus benchmark system validate the rationality and correctness of the theory and model presented in this article.
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