摘要
西电东送超高压直流输电面临绝缘子严重覆冰的威胁。该文在人工气候室内对覆冰XZP/XZWP4-160绝缘子的闪络特性及放电发展过程进行了试验研究。根据试验结果,讨论了覆冰绝缘子直流闪络电弧的发展过程,提出了覆冰绝缘子直流电弧发展速度与影响因素的关系,并分析了覆冰直流绝缘子覆冰闪络时形成二条不同路径的原因,此外,论文讨论了覆冰直流绝缘子闪络电压与极性的关系,并提出随着气压的降低,覆冰绝缘子正负极性闪络电压绝对值的差异逐渐减小。
For the external insulation of UHV transmission lines in the West-to-East Power Transmission Project,one of key problems is the icing.Based on the tested results carried on the XZP/XZWP4-160 DC iced insulators in the artificial climate chamber in the High Voltage Laboratory of Chongqing University, this paper discusses the DC flashover process of iced insulators,and puts forward the relation between the DC arc developing speed and the external factors,The difference flashover paths of iced insulator has been analyzed, and the effect of voltage polarity on flashover voltage have been obtained.And it indicates that the difference between the positive and negative DC flashover voltages of iced insulator decreases with the fall of atmospheric pressure.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2004年第6期111-115,共5页
Proceedings of the CSEE
基金
国家自然科学基金(90210026)~~
