摘要
用阻性电流中的基波分量 ir和三次分量 i3r 监测金属氧化锌避雷器 (MOA)可及时发现其老化或劣化现象。但是电网谐波电压会影响 ir、i3r监测的准确性 ,经详细仿真研究 ,提出了用改进的容性电流补偿法求取存在电网谐波电压影响时的阻性电流 ,结合同步采样原理 ,开发出了一套总线式 MOA阻性电流在线监测系统。
It is reasonable to adopt the basic component of resistive leakage current i _r and thrice component i _ 3r to monitor Metal Oxide Surge Arrester. This indictors can find aging phenomenon of Metal Oxide Surge Arrester(MOA) timely. But the existence of harmonic voltages in the power system will influence the indictor's accuracy. This article will analyze this effect and put forward a improved compensation method to separate the resistive leakage current under the existence of harmonic voltage. Based on the method described above, we developed an Bus-module type on-line resistive current monitoring system of MOA.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2003年第9期24-25,54,共3页
High Voltage Engineering
基金
华北电力大学青年教师科研基金资助项目 (QN0 3 0 10 0 1)
