摘要
金属氧化物避雷器(MOA)对于电力系统安全运行起着重要作用,需要寻找合适指标对其老化实现实时的在线监测。通过Matlab仿真方法对目前存在的2种不同类型的基波阻性电流和三次谐波阻性电流进行计算和对比分析,结果表明:选择基波电压作用下产生的基波阻性电流和三次谐波阻性电流能够更准确地反映MOA老化情况。并根据Fryze瞬时功率定义,提出了基波电压作用下基波阻性电流简便求解算法,通过仿真论证了该算法的有效性。
The metal oxide arrester （MOA） plays a very important role in the safe operation of power systems. In order to find an appropriate indicator that can reflect the degradation of MOA, a comparative study is made through Matlab simulation on the existing fundamental harmonic resistant current and the third harmonic resistant current. The result shows that the resistant current with fundameutal harmonic component and the third harmonic component produced by the fundamental voltage can better reflect the degradation of MOA. In addition, based on Fryze ＇ s power definition, a simple algorithm which can calculate the fundamental harmonic current produced by the fundamental voltage is proposed and its efficiency is validated by simulation.
出处
《中国电力》
CSCD
北大核心
2015年第8期80-85,共6页
Electric Power
基金
国家重点基础研究发展计划(973计划)资助项目(2014CB441405)
国家自然科学基金资助项目(41075025)~~
关键词
MOA
在线监测
指标
谐波电压
基波阻性电流
容性电流
MOA
online monitoring
index
harmonic voltage
fundamental harmonic resistant current
capacitive current
