基于调整中性点接地阻抗的配电网电容电流测量方法  

A method of measuring capacitive current in distribution network based on adjusting the neutral grounding impedance

作　　者：靳维 袁朋生 张洋 李晓波[2] 

机构地区：[1]徐州润泽电气有限公司,江苏徐州221000 [2]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电力系统保护与控制》2015年第7期37-41,共5页Power System Protection and Control

基　　金：国家自然科学基金(51107143)~~

摘　　要：提出了一种同时调节消弧线圈电感量和阻尼电阻保持系统零序电压相位不变的测量电容电流的方法。为限制消弧线圈接地系统中性点位移电压,常常并联电阻提高系统的阻尼率。通过增加或者减小消弧线圈并联阻尼,调节消弧线圈电感量保持零序电压相位不变,即可以通过零序电压的幅值比例关系计算得到系统的电容电流。该方法计算简单,测量方便。利用Matlab建立仿真模型进行仿真计算,表明该方法具有很高的测量精度。A method of measuring capacitive current is proposed based on simultaneously adjusting the arc-suppression coil inductance and damping resistor to keep the system zero-sequence voltage phase unchanged. To limit neutral displacement voltage in arc-suppression coil grounding system, the parallel resistance is often adopted to improve the damping rate of system. The zero-sequence voltage phase keeps unchanged by increasing or decreasing the arc suppression coil damping and adjusting arc-suppression coil inductance, capacitive current of system can be calculated by amplitude ratio between the zero-sequence voltage. It is simple and convenient to measure by the method. Simulation model is simulated by Matlab, which shows that the method has high measuring accuracy.

关 键 词：电容电流 零序电压 相位不变 阻尼 MATLAB 

分 类 号：TM933.1[电气工程—电力电子与电力传动]