交流金属氧化物避雷器受潮与阻性电流的关系  

Relation Between Resistive Current and MOA Affected with Damp

作　　者：高峰[1] 郭洁[1] 徐欣[1] 严强 

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]中联西北工程设计研究院,西安710082

出　　处：《高电压技术》2009年第11期2629-2633,共5页High Voltage Engineering

摘　　要：为了能够有效监测MOA的运行状态,及时发现MOA的事故隐患,避免事故扩大,对高压、超高压、特高压交流无间隙金属氧化物避雷器受潮时泄漏电流变化规律进行了试验研究,分析了泄漏电流与受潮状态和各电流分量反应灵敏度的关系。试验结果表明:MOA受潮时阻性电流基波有明显变化,在一些情况下阻性电流3次谐波比基波对MOA受潮的反映更为灵敏,阻性电流3次谐波也可以作为MOA状态监测参量,并给出了不同受潮状态下阻性电流的变化规律,为避雷器在线监测状态参量的选取和判据的确定提供依据。For the purpose of monitoring the status of MOA which is in services effectively and discover the potential causes of accidents of MOA timely, which is able to prevent the accidents from being expanded. The variation in the leak current of damp MOA that is tested under high-voltage, UHV, and EHV is studied in the lab. The analysis on the relations between leak current and damp level of MOA shows that there is significant change in fundamental resistive current and the increasing of third harmonic resistive current is greater than the fundamental resistive current in some cases. The third harmonic resistive current can also be considered as a reference value of on-line MOA monitoring. Also, the paper shows the variation in resistive current of MOA which is in different damp level. The experiment result provides the election basis of reference value and criterion of on-line MOA monitoring.

关 键 词：高压 交流无间隙金属氧化物避雷器 泄漏电流 受潮 阻性电流 在线监测 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM930.12