考虑逆变电源控制策略的电流保护整定计算  

Calculation of Current Protection Setting Based on Inverter Generation Control Strategy

作　　者：金甚达 宋依群[1] 范春菊[1] 姜山[1] 李潇 JIN Shenda;SONG Yiqun;FAN Chunju;JIANG Shan;LI Xiao(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Minhang District,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240

出　　处：《电网技术》2021年第9期3690-3699,共10页Power System Technology

基　　金：国家自然科学基金项目(51877135);国家重点研发计划项目(2016YFB0900610)。

摘　　要：逆变电源不同的控制策略影响着其输出特性与故障特性,从而影响接入配电网原有的电流保护动作特性。首先分析了在电网电压暂降以及不对称电网电压暂降情况下逆变电源的控制策略,得到逆变电源的输出特性与故障特性,基于逆变电源特殊的输出特性,再结合配电网的三段式电流保护原理,研究了含分布式逆变电源接入的配电网不同故障类型电流保护整定值的计算方法,从而提高分布式电源接入后配电网电流保护动作的可靠性。最后在PSCAD/EMTDC中搭建了含分布式逆变电源的配电网模型,利用不同控制策略,控制逆变电源的输出,并对所提出的电流保护整定计算进行仿真验证,验证了所提整定方法的正确性和有效性。The different control strategies for the grid-interfaced inverters affect their output characteristics and fault characteristics, thereby affecting the original current protection of the distribution network with IIDGs. This paper analyzes the control strategies of the grid-interfaced inverters in the case of the grid voltage dip and the asymmetric grid voltage dip, finding the output characteristics of inverter power. Based on the special output characteristics of the inverter generator and the current three-stage protection principle of the distribution network, the calculation method of the setting value of the current protection with different fault types in the distribution network with IIDGs can be accessed, which can improve the performance and reliability of the current protection of the distribution network. Finally, a distribution network model with IIDGs is built in PSCAD/EMTDC. Using different control strategies to control the output of the inverter generator, the proposed current protection setting calculation method is verified through simulations.

关 键 词：逆变电源 控制策略 电流保护 整定计算 

分 类 号：TM721[电气工程—电力系统及自动化]