变压器电容隔直装置关键技术及应用分析  

Key Technology and Application Analysis of Capacitive DC Blocking Device for Transformer

作　　者：李游 郭超 卿俊杰 黄学海 赵政[2] 周波 LI You;GUO Chao;QING Jun-jie;HUANG Xue-hai;ZHAO Zheng;ZHOU Bo(State Grid Chengdu Power Supply Company,Chengdu 610041,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]国网成都供电公司,四川成都610041 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电工电气》2019年第9期12-17,共6页Electrotechnics Electric

摘　　要：为保证变压器安全稳定运行,需要利用变压器直流偏磁抑制装置控制流过变压器中性点的直流。介绍了变压器电容隔直装置的基本原理、装置组成和不同类型隔直装置的对比,阐述了正常运行状态和系统故障时电容的投切控制逻辑与运行模式,结合实际采集数据分析了电容投切后的电气量变化,解释了电容充电回路的振荡过程,并对隔直电容应用对电网保护的影响进行了研究。In order to ensure the safe and stable operation of the transformer,it is necessary to control the DC flowing through the neutral point of the transformer with the DC bias suppression device.Introduction was made to the basic principle,the device composition and the comparison of different types of capacitive DC blocking devices.This paper described the control logic and operation mode of the capacitive DC blocking device in normal operation state and the system fault.The change of electric quantity after the capacitor switching was analyzed according to the actual acquisition data,and the oscillation process of the capacitor charging circuit was explained.This paper studied on the influence of the blocking capacitor application on the grid production.

关 键 词：变压器 直流偏磁 电容隔直 控制逻辑 

分 类 号：TM403.5[电气工程—电器]