南方电网技术2011，Vol.5Issue(z1)：75-78,4.
220kV分级绝缘变压器中性点保护配置探讨
On the Neutral Point Protection Configuration of 220 kV Graded Insulation Transformers
摘要
Abstract
To choose a proper neutral point protection for 220 kV graded insulated transformer, the paper analyzes the protection configuration of arrester and discharge gap for the neutral point of 220 kV graded insulated transformer. According to the situation of Guizhou Power Grid, in which its 220 kV un-earthed transformer of neutral point grounding system adoptes coordinated protection by metal oxide arrester (MOA) and protective gap, the paper calculates the protection gap of the transformer's neutral point, takes weather factor into consideration, and concludes that a maximum protection gap should be selected to prevent frequent operation, and meets the over-voltage protection requirements.关键词
分级绝缘变压器/中性点/避雷器/保护间隙Key words
graded insulated transformer/ neutral point/ surge arrester/ protective gap分类
信息技术与安全科学引用本文复制引用
张霖,杨超..220kV分级绝缘变压器中性点保护配置探讨[J].南方电网技术,2011,5(z1):75-78,4.
