基于正序电流有功分量的有源配电网多端差动保护方法研究  

Research on Multi-terminal Differential Protection Method Based on Active Component of Positive Sequence Current

作　　者：郭少飞 李铁成 魏颖莉 栾士岩 王永辉 GUO Shaofei;LI Tiecheng;WEI Yingli;LUAN Shiyan;WANG Yonghui(State Grid Hebei Electric Power Research Institute,Shijiazhuang 050020,China;State Grid Hebei Electric Power Co.,Ltd.Xiong'an New Area Power Supply Company,Xiong'an 071600,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,河北石家庄050020 [2]国网河北省电力有限公司雄安新区供电公司,河北雄安新区071600

出　　处：《河北电力技术》2024年第2期28-32,共5页Hebei Electric Power

基　　金：国网河北省电力有限公司科技项目(kj2022-005)。

摘　　要：分布式电源的接入,使得潮流双向流动、短路电流变化复杂,传统三段式电流保护难以适用。针对分布式电源负荷多端接入场景下难以解决数据同步的问题,提出一种基于正序电流有功分量的多端差动保护方法,利用正序电流有功分量为直流量、基本不受对时误差影响的特点,构造差动保护判据,实现多端差动保护。仿真结果表明,该方法能够有效判别区内故障,且具有一定的抗过渡电阻能力。The access of distributed power source makes the bidirectional flow of power flow and the change of short-circuit current complicated,and the traditional three-stage current protection is difficult to apply.In order to solve the problem of data synchronization in the scenario of multi-terminal load access of distributed power supply,a multi-terminal differential protection method based on the active component of positive sequence current was proposed.The differential protection criterion is formed to realize the multi-terminal differential protection method by taking advantage of the fact that the active component of positive sequence current is a direct flow,which is basically not affected by the time error.Simulation results show that the proposed method can effectively identify faults in the region and has a certain ability to resist transition resistance.

关 键 词：正序电流 有功分量 有源配电网 多端差动 

分 类 号：TM77[电气工程—电力系统及自动化]