MOA过电压保护电力设备故障预警技术  

MOA overvoltage protection power equipment fault warning technology

作　　者：张蕙峰 张永新 马雪峰 ZHANG Huifeng;ZHANG Yongxin;MA Xuefeng(SGCC Gansu Extra High Voltage Company,Lanzhou 730070,China)

机构地区：[1]国网甘肃省电力公司超高压公司,兰州730070

出　　处：《自动化与仪器仪表》2024年第11期57-60,共4页Automation & Instrumentation

基　　金：国网甘肃省电力公司科技项目(522745230002)。

摘　　要：研究针对电力系统中的金属氧化避雷器进行在线监测,以泄漏电流特性分析为手段预警设备故障。在谐波分析进行快速傅里叶变化之前,选用合适的窗函数以及增加频域中的采样点数对谐波分析进行改进,经过Simulink仿真,有效模拟了110 kV MOA的工作状态。实验显示,改进谐波分析法提高了频率与相位预测的精准度,基波频率预测值50.030 49 Hz,接近实际值50 Hz。结果表明,该方法可提升MOA故障预警的准确性,能有效保护电力设备和预防电网过电压。Online monitoring of metal oxidation arrester in power system was studied,and leakage current characteristics were analyzed as a means to warn equipment failure.Before the fast Fourier change of harmonic analysis,the harmonic analysis is improved by selecting appropriate window function and increasing the number of sampling points in the frequency domain.Through Simulink simulation,the working state of 110kV MOA is effectively simulated.The experiment shows that the improved harmonic analysis method improves the accuracy of frequency and phase prediction.The predicted value of fundamental frequency is 50.03049Hz,which is close to the actual value of 50Hz.The results show that this method can improve the accuracy of MOA fault warning.

关 键 词：MOA 泄漏电流 故障预警 谐波分析 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]