含电流序分量的分布式电源配电网自适应电流速断保护分析  

Analysis of Adaptive Current Quick Break Protection Based on Current Sequence Component in Distribution Network with Distributed Generation

作　　者：李俊鹏 周羽生[1] LI Junpeng;ZHOU Yusheng(School of Electrical and Information Engineering,Changsha University of Technology,Hunan 410114,China;Dongguan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangdong 523000,China)

机构地区：[1]长沙理工大学电气与信息工程学院,湖南410114 [2]广东电网有限责任公司东莞供电局,广东523000

出　　处：《电子技术（上海）》2022年第10期20-21,共2页Electronic Technology

基　　金：国家自然科学基金资助项目(52177015);湖南省教育厅科学研究重点资助项目(19A018)。

摘　　要：针对逆变型分布式电源接入配电网对传统保护方式的影响,阐述基于电流序分量的自适应电流速断保护方案。分析了含多个分布式电源的配电网故障复合序网络,构造了故障参数节点方程,利用迭代法求解节点方程中的各节点的故障电压和故障电流;分析了两相短路和三相短路的故障特征,应用电流序分量实现自适应电流速断保护,并引入低电压因子,实现上下级保护之间的配合。利用PSCAD/EMTDC软件仿真验证了该保护方案的有效性。In view of the impact of the inverter distributed power supply connected to the distribution network on the traditional protection methods,this paper describes an adaptive current quick break protection scheme based on the current sequence component.The fault composite sequence network of distribution network with multiple DGs is analyzed,the node equation of fault parameters is constructed,and the fault voltage and fault current of each node in the node equation are solved by iterative method;This paper analyzes the fault characteristics of two-phase short circuit and three-phase short circuit,applies current sequence component to realize adaptive current quick break protection,and introduces low voltage factor to realize the coordination between upper and lower level protection.The validity of the protection scheme is verified by PSCAD/EMTDC software simulation.

关 键 词：多个分布式电源 电流序分量 自适应电流速断保护 低电压因子 

分 类 号：TN86[电子电信—信息与通信工程]