35 kV并联干式电抗器故障缺陷分析
Fault Analysis of 35 kV Shunt Dry-type Reactor
陈东明 1王建伟 1商力新 1李旸 1彭凯 1赵佳鑫1
作者信息
- 1. 国网冀北电力有限公司超高压分公司,北京 102488
- 折叠
摘要
通过诊断试验发现正常运行的35 kV并联电抗器存在匝间绝缘缺陷,处于带病运行状态.在现场、厂内分别对该电抗器进行直流电阻、电抗值、工频损耗、匝间绝缘、雷电冲击等试验,透过数据分析匝间绝缘缺陷逐步劣化的过程.并对缺陷电抗器进行解体,发现第8-3层存在典型湿污放电痕迹,与试验结论相吻合,分析外观爬电、击穿产生缺陷的原因.现有试验项目对发现匝间绝缘缺陷的灵敏性及原因分析.结合干式电抗器的运行环境、缺陷特征等因素,对其生产工艺、日常维护、检修试验项目选择等提出相关建议,确保能够及时发现干式电抗器潜在缺陷,防止带病运行,保障电网安全稳定运行.
Abstract
In this paper,it is found through the diagnosis test that the 35 kV shunt reactor in normal opera-tion has inter-turn insulation defect and is in operation state with fault.Such tests as DC resistance,reac-tance,power frequency loss,inter-turn insulation and lightning impulse are performed on the reactor respec-tively at site and factory,and the gradual deterioration process of the inter-turn insulation defects is ana-lyzed through data analysis.It is found after the disassembly of the reactor with defect that there are typical wet contamination discharge traces on the 8-3 layer,which is consistent with the test results.The causes of appearance creepage and breakdown are analyzed.The sensitivity and cause analysis of the existing test items to find inter-turn insulation defects is displayed.In combination with such factors as the operating en-vironment and defect characteristics of the dry-type reactor,relevant suggestions for its production process,routine maintenance,maintenance and test item selection are proposed as to ensure that the potential de-fects of the dry-type reactor can be found in time,prevent the operation with defects,and assure safe and sta-ble operation of the power grid.
关键词
干式电抗器/直流电阻/匝间绝缘/解体/击穿Key words
dry reactor/DC resistance/inter-turn insulation/disintegrate/breakdown引用本文复制引用
出版年
2024
NETL
NSTL
万方数据