华电技术 ›› 2017, Vol. 39 ›› Issue (6): 44-46.

• 技术交流 • 上一篇    下一篇

均压电容异常引起的500kV避雷器过热试验分析

  

  1. 1.浙江工商职业技术学院,浙江宁波〓315012; 2.国网浙江省电力公司检修分公司,杭州〓311232
  • 出版日期:2017-06-25 发布日期:2017-07-10

Analysis and test on 500kV surge arrester overheating caused by ceramic capacitor abnormal

  1. 1.Zhejiang Business Technology Institute, Ningbo 315012, China; 2.Zhejing Electric Power Corporation Maintenance Branch, Hangzhou 311232, China
  • Online:2017-06-25 Published:2017-07-10

摘要:

均压电容在避雷器内部起着改善内部电压分布、抑制外部杂散电容影响的作用。针对1例变电站500kV避雷器过热案例进行研究分析。对避雷器进行了多种手段在线检测,表明避雷器内部存在均压电容异常;进一步的离线试验和解体分析发现该避雷器均压电容上、中节反装,验证了分析结论。针对避雷器的发热异常,提出了相应措施。

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Abstract:

:Ceramic capacitor plays an improve internal voltage distribution within the arrester, to inhibit the action of the external stray capacitance effects. In this paper analysis and test on 500kV surge arrester overheating caused by ceramic capacitor abnormal. A variety of online detection means shows that  arrester within equalizing capacitor; further offline test and disassembly analysis found that existence of ceramic capacitor upper and middle section exists, verify the analysis. In view of the fever abnormal surge arrester, corresponding measures are put forward.

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