串补电容器组不平衡电流影响因素及调平方法  

Influencing Factors of Unbalanced Current of Series Compensation Capacitor Bank and Leveling Method

作　　者：罗赞琛[1] 宋云祥 杨政 LUO Zanchen;SONG Yunxiang;YANG Zheng(Nanning Bureau,CSG EHV Power Transmission Company,Guangxi Nanning 530021,China)

机构地区：[1]中国南方电网超高压输电公司南宁局,广西南宁530021

出　　处：《广西电力》2022年第2期22-28,共7页Guangxi Electric Power

摘　　要：在特定情况下,需要对串补电容器组进行电桥调平,由于受到现场因素影响,调平工作会遇到若干技术问题。文章从串补电容器组不平衡电流的影响因素及电容器组电容值测量及不平衡电流测量的试验特性出发,分析串补电容器组调平的现场的问题,结合实例提出了现场调平方法,包括电容量调整方向判断,对调电容器单元的电容相差值理论计算,不平衡率是否合格的判断,现场调试流程。经现场实践,验证了所提方法的正确性和有效性。In certain cases,it is necessary to level the bridge of the series compensation capacitor bank.Due to the influence of field factors,the leveling work can encounter technical problems.In this paper,these problems are analyzed based on factors affecting the unbalanced current of series compensation capacitor banks,as well as test characteristics of capacitance measurement and unbalanced current measurement.A field leveling method is proposed and illustrated with an example.The proposed method includes steps such as direction judgment of capacitance adjustment,theoretical calculation of the difference in capacitance of the capacitor unit,judgement of the unbalance rate,and field debugging process.The correctness and effectiveness of the proposed method are verified by field practice.

关 键 词：串补电容器组 不平衡 调平 桥臂 

分 类 号：TM761[电气工程—电力系统及自动化]