| 引用本文: | 黄新波,张龙,朱永灿,周岩,邬红霞.基于功角特性的干式空心电抗器匝间绝缘在线监测技术[J].电力自动化设备,2019,39(2): |
| HUANG Xinbo,ZHANG Long,ZHU Yongcan,ZHOU Yan,WU Hongxia.Online inter-turn insulation monitoring technology based on power angle characteristics for dry-type air-core reactor[J].Electric Power Automation Equipment,2019,39(2): |
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| 摘要: |
| 干式空心电抗器在长期运行中由于绝缘老化而故障频发，其中匝间短路故障率最高。建立电抗器匝间短路故障等效电路模型，分析了匝间绝缘短路故障引起的电抗器功角变化特性，基于此提出一种基于功角特性的干式空心电抗器匝间绝缘在线监测技术。采用改进中值滤波算法对原始数据进行去噪处理，通过修正理想采样频率法消除了非整周期采样带来的采样误差，利用谐波分析法获取电抗器的功率因数角。试验结果表明，所提技术可以实现对电抗器的少匝匝间绝缘短路故障的有效监测。 |
| 关键词: 电抗器 干式空心电抗器 匝间短路故障 功率因数角 谐波分析 |
| DOI：10.16081/j.issn.1006-6047.2019.02.021 |
| 分类号:TM472 |
| 基金项目:陕西省重点科技创新团队计划项目(2014KCT-16)；陕西省协同创新计划项目(2014XT-07)；陕西省工业科技攻关项目(2016GY-052) |
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| Online inter-turn insulation monitoring technology based on power angle characteristics for dry-type air-core reactor |
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HUANG Xinbo, ZHANG Long, ZHU Yongcan, ZHOU Yan, WU Hongxia
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College of Electronics and Information, Xi'an Polytechnic University, Xi'an 710048, China
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| Abstract: |
| Dry-type air-core reactors have frequent faults in long-term operation due to insulation aging, among which the inter-turn short circuit fault rate is the highest. The equivalent circuit model of reactor inter-turn short circuit fault is established, and the characteristics of reactor power angle variation caused by inter-turn insulation short circuit fault are analyzed, based on which, an online inter-turn insulation monitoring technology based on power angle characteristics for dry-type air-core reactor is proposed. The improved median filter algorithm is used to denoise the original data, the sampling error caused by non-integer period sampling is eliminated by correcting the ideal sampling frequency method. The power factor angle of reactor is obtained by harmonic analysis. The test results show that the less-coil inter-turn insulation fault of the reactor can be effectively monitored by the proposed technology. |
| Key words: electric reactors dry-type air-core reactor inter-turn short circuit power factor angle harmonic analysis |
