浙江电力Issue(11)：36-39,4.
500 kV架空地线金具发热的分析与对策
Analysis and Countermeasure of Hardware Heating for 500 kV Overhead Ground Wire
黄巍 1程泳 1董建新 1胡俊华 1钱国钟1
作者信息
- 1. 浙江省电力公司检修分公司，杭州 311232
- 折叠
摘要
Abstract
Combined with the actual measurement result of 500 kV Qiaosi substation, the impact of grounding mode of overhead ground wire on hardware heating is analyzed. The grounding circulating current brought by the direct grounding of overhead ground wire is the main reason of hardware heating and results in transmis-sion loss. Though the section insulation and same point grounding method can eliminate circulating current and reduce the loss, there is high induced voltage on overhead grounding wire, which poses limitation to the use. Aiming at this problem, the method of odd number section grounding and even number section transposi-tion is proposed. By using the characteristic that the voltage phase of the double overhead ground wires is nearly opposite, the induced voltage of overhead grounding wire is neutralized through transposition strategy, grounding circulating current and transmission loss are reduced. The current sharing factor of overhead grounding wire after transposition changes little, bringing less impact on step voltage and ensuring the safety.关键词
架空地线/金具发热/OPGW/接地方式/环流Key words
overhead ground wire/hardware heating/OPGW/grounding mode/circulating current分类
信息技术与安全科学引用本文复制引用
黄巍,程泳,董建新,胡俊华,钱国钟..500 kV架空地线金具发热的分析与对策[J].浙江电力,2013,(11):36-39,4.
