杨协伟,方文田,蔡伟杰
YANG Xiewei,FANG Wentian,CAI Weijie

• 1:广东电网有限责任公司揭阳供电局

摘要(Abstract)：

为解决MOA（金属氧化物避雷器）带电测试因空间干扰导致的阻性电流测量失真问题，提高MOA阻性电流测试精度，分析总结了生产现场的MOA空间干扰规律，并针对两种不同的MOA空间干扰模型提出了相应的补偿策略。采用基于KNN(K近邻)的参数估计方法，降低空气湿度变化对空间干扰补偿策略的影响。通过基于Simulink的电路仿真验证了该方法能够有效提高MOA阻性电路的计算精度。最后，通过现场实测结果与停电试验数据的对比，说明了现有仪器所采用的“自动边补”算法在空间不平衡干扰的情况下无法适用。同时，也证明了所述算法可以有效提升MOA阻性电流计算精度。
In order to solve the problem of measurement distortion of resistive current caused by space interference in the live test of MOA(metal oxide arresters), and improve the measurement accuracy of resistive current for MOA, the law of spatial interference for MOA in the production site is analyzed and summarized, and different compensation strategies are proposed for two different spatial interference models of MOA. The parameter estimation method based on K-nearest neighbor(KNN) is adopted to reduce the influence of humidity change on spatial interference compensation strategy. Circuit simulation based on Simulink shows that this method can effectively improve the calculation accuracy of resistive circuits of MOA. Finally, through further field measurement results and comparison with power outage test data, it is shown that the "automatic edge compensation" algorithm used by existing instruments is not applicable in the case of spatial imbalance interference. At the same time, it is proved that the proposed algorithm can effectively improve the calculation accuracy of resistive current for MOA.

关键词(KeyWords)： 金属氧化物避雷器;阻性电流;在线监测;空间干扰
MOA(metal oxide arresters);resistive current;online monitoring;spatial interference

Abstract:

Keywords:

基金项目(Foundation): 广东电网有限责任公司揭阳供电局职创项目（GDZC202205010003）

作者(Author): 杨协伟,方文田,蔡伟杰
YANG Xiewei,FANG Wentian,CAI Weijie

DOI: 10.19585/j.zjdl.202308012

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