合闸时CVT分压电容暂态过电压的仿真研究  

Simulation Study on Transient Overvoltage of Dividing Capacitance of CVT at Closing Operation

作　　者：王丹江[1] 崔志铭 蔡冰冰[1] 刘金友[1] 刘春[1] 李震彪[1] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074

出　　处：《电力电容器与无功补偿》2014年第6期46-51,共6页Power Capacitor & Reactive Power Compensation

摘　　要：电网合闸时在CVT分压电容上出现的暂态过电压会对CVT分压电容造成一定的损害。使用Matlab/Simulink建立CVT暂态仿真模型,仿真不同合闸相角情况下分压电容暂态过电压;同时研究线路等效电阻、电感值及CVT参数对分压电容上出现的暂态过电压的影响,得到了这些参数对暂态过电压的影响规律。仿真结果对CVT分压电容上暂态过电压的抑制研究、降低分压电容故障率以及CVT运行具有重要价值。The transient overvoltage on the voltage dividing capacitor has a definite harmfulness to the voltage dividing capacitance of CVT at closing operation of power network.The transient simulation model of CVT by the use of Matlab/Simulink is set up to simulate transient overvoltage of the opening capacitor at different closing phase angles and,at the same time,to study influence of equivalent resistance of line,inductance and CVT parameters on the transient overvoltage on the dividing capacitor and the influence rule of those parameters on the transient over voltage is obtained.The simulation result has significant value in mitigation study of dividing capacitance on CVT,reducing fault rate of the dividing capacitor and operation of CVT.

关 键 词：分压电容 暂态过电压 合闸相角 

分 类 号：TM451.2[电气工程—电器]