HVDC用直流滤波电容器组均压技术研究  

Study on Grading Technology of DC⁃filter Capacitor Bank for HVDC

作　　者：左强林 赵彦军 孙振瑜 ZUO Qiangin;ZHAO Yanjun;SUN Zhenyu(Wuxi Sunking Power Capacitor Co.,Ltd.,Jiangsu Wuxi 214100,China;Guangxi University,Nanning 530000,China)

机构地区：[1]无锡赛晶电力电容器有限公司,江苏无锡214100 [2]广西大学,南宁530000

出　　处：《电力电容器与无功补偿》2024年第4期1-5,共5页Power Capacitor & Reactive Power Compensation

摘　　要：本文从HVDC用直流滤波电容器的台架结构出发,研究了台架设计对直流电压分配的影响,研究了电容器外壳连接元件串联段数、泄漏比与直流电压不均匀系数的关系,得出元件串联段数越多直流电压分配越不均匀的结论;结合电容器单元的特点,得出电容器的电时间常数是一个仅与ρε相关的常数的结论,并依据上述结论分析了大容量直流电容器组运行不理想的原因,给出了直流滤波电容器组的设计建议。In this paper,the influence of bench design on DC voltage distribution is studied on the basis of bench structure of DC filter capacitor for HVDC,the relationship among the number of series segments,leakage ratio and DC voltage non-uniform coefficient of capacitor shell connection elements is studied,and the conclusion that the more the number of series segments of the elements,the more the non-uniform of the DC voltage distribution is concluded;In combination with the characteristics of the capacitor unit,it is concluded that the electric time constant of the capacitor is only a constant which is only related toρεand,on the basis of above conclusion,the reasons for the unsatisfactory operation of the large-capacity DC capacitor bank are analyzed,and the design recommendations for DC filter capacitor banks are given.

关 键 词：HVDC 直流滤波电容器 均压措施 直流电压不均匀系数 泄漏比 电时间常数 

分 类 号：TM53[电气工程—电器] TM721.1