光伏渗透率对电力系统频率的影响及控制策略  

Influence of photovoltaic penetration on power system frequency and its control strategy

作　　者：蒋小亮[1] 丁岩[1] 全少理[1] 关朝杰 陈力[2] 胡钋[2] 

机构地区：[1]国网河南省电力公司经济技术研究院,河南郑州450052 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2015年第5期686-689,696,共5页Engineering Journal of Wuhan University

基　　金：国网河南省电力公司科技项目(编号:AGHAJY00GHJS1400030)

摘　　要：光伏并网对电力系统频率稳定会造成一定影响,考虑同步发电机、负荷与光伏出力波动特性的交互作用,推导了含不同光伏渗透率下的系统总功率波动概率模型.将同步电机一次调频的参数进行优化,即作为变量引入控制环节,利用发电机的转子方程,实现对发电机功率的控制和系统频率的调节.仿真结果表明应用所提出的控制策略,可以有效减弱光伏对系统频率的影响,提高光伏的渗透率.With photovoltaic power station connected into grid, the frequency stability of power system may be affected. Considering the interaction of synchronous generator, load and photovoltaic output fluc- tuation characteristics, a total system power fluctuation probability model with different photovoltaic pene- tration is derived. The primary frequency parameter of synchronous motor is optimized, by making it as a variable introduced into the control link. While combined with the motion equations of rotor, we can a- chieve the generator power control and system frequency regulation. Simulation results show that the ap- plication of the proposed control strategy can effectively reduce the impact of photovoltaic power station on system frequency and can improve photovoltaic penetration.

关 键 词：光伏渗透率 功率波动 概率函数 一次调频 控制策略 

分 类 号：TM615[电气工程—电力系统及自动化] TM74