基于信号注入法的主从式消弧线圈柔性补偿控制策略  

Flexible Compensation Control Strategy for Master-slave Arc Suppression Coil Based on Signal Injection Method

作　　者：林凡勤 杨晶晶[1] 孙华忠[1] 翟一鸣 邹贵彬[2] LIN Fanqin;YANG Jingjing;SUN Huazhong;ZHAI Yiming;ZOU Guibin(State Grid Weifang Power Supply Company,Weifang 261021,China;School of Electrical Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]国网潍坊供电公司,潍坊261021 [2]山东大学电气工程学院,济南250061

出　　处：《电力系统及其自动化学报》2022年第12期10-17,共8页Proceedings of the CSU-EPSA

基　　金：国网山东省电力公司科技项目(2021A-019)。

摘　　要：为解决对地电容测量结果不精确、消弧线圈控制复杂、补偿效果和熄弧能力有限等问题,本文提出一种基于信号注入法的主从式消弧线圈柔性补偿控制策略。以一种对地电容测量新方法为基础,基于开关投切的主从式消弧线圈为载体,采用预随调式控制方式,在系统正常运行时进行对地电容的实时测量和消弧线圈的在线调整。在发生单相接地故障时,通过开关动作将消弧线圈迅速调整为全补偿状态,从而实现配电网不同运行方式下单相接地电容电流的精准补偿。最后,通过PSCAD/EMTDC仿真软件对所提控制策略的有效性进行了验证。To solve the problems such as imprecise measurement result of earth capacitance,complex control of arc suppression coil,and limited compensation effect and arc extinguishing capability,a flexible compensation control strategy for a master-slave arc suppression coil based on the signal injection method is proposed in this paper.On the basis of a novel earth capacitance measurement method,a master-slave arc suppression coil with a hurl-slices switch is taken as the carrier,and the presetting and following-setting control mode is adopted.In the normal operation of the system,the real-time measurement of earth capacitance and the on-line adjustment of arc suppression coil are carried out.When a single-phase grounding fault occurs,the arc suppression coil will be quickly adjusted to a fully-compensated state by the switching action.In this way,the accurate compensation of single-phase grounding capacitive current in different operation modes of distribution network is realized.Finally,the effectiveness of the proposed control strategy is verified by PSCAD/EMTDC simulation software.

关 键 词：消弧线圈 柔性补偿 配电网 对地电容 

分 类 号：TM773[电气工程—电力系统及自动化]