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| 摘要: |
| 分析了金属氧化物避雷器MOA(Metal Oxide Arrester)带电测量时泄漏电流的特点，提出带电测量时判断MOA早期故障的依据是阻性电流是否存在增量，并指出带电测量的关键是正确测量阻性电流基波的变化。提出了一种三相电流法测量阻性电流，并在理论分析的基础上，研制了MOA带电测量装置。利用该装置进行了模拟阻性电流增大的实验，结果表明，三相电流法能够正确测量出阻性电流的增量。可以方便地对MOA早期故障进行判断。 |
| 关键词: 三相电流法 金属氧化物避雷器 阻性电流 带电测量 |
| DOI： |
| 分类号:TM862 TM930.12 |
| 基金项目: |
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| Electrified measuring of MOA using three-phase current method |
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ZHAO Wei WAN De-jun YUE Jian-Min
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| Abstract: |
| The features of leakage current of MOA(Metal Oxide Arrester) during electrified mea - suring are analyzed. The increment of resistive current is the criterion to detect its early fault,and the key of electrified measuring is the correct measuring of its fundamental resistive current variation. A three-phase current method is presented to measure resistive current,based on which an electrified measuring instrument for MOA is developed. An experiment of simulative resistive current increase is carried out. The results show that the three-phase current method can measure the increment of resistive current correctly,which easies the detection of early MOA fault. |
| Key words: three-phase current method,MOA,resistive current,electrified measurement |
