宁夏电力Issue(1)：7-10,4.DOI:10.3969/j.issn.1672-3643.2013.01.002
一种电炉变压器中性点横差保护方案研究
Study on neutral point transverse differential protection scheme for a kind of electric furnace transformer
王小立 1刘志远 1温靖华1
作者信息
- 1. 宁夏电力公司电力调度控制中心，宁夏 银川 750001
- 折叠
摘要
Abstract
Analyzes the structure characteristic of common iron core electric furnace transformer, puts forward that reconnected neutral point of three single phase transformers after which were untied, current transformer were connected between the neutral point of the main transformer and voltage-reg⁃ulating transformer, forms neutral point transverse differential protection of electric furnace transform⁃er. When interturn fault, same phase but different branches fault and phase fault happened in electric furnace transformer, neutral point transverse differential protection can reliably act and to be the back⁃up protection of longitudinal differential protection for compensating capacitor. Using dynamic model test verified the action performance of neutral point transverse differential protection. The test result shows that as the effective supplement of longitudinal differential protection for electric furnace trans⁃former, neutral point transverse differential protection can markedly improve the sensitivity and reli⁃ability of differential protection for electric furnace transformer.关键词
电炉变压器/中性点/横差保护Key words
electric furnace transformer/neutral point/transverse differential protection分类
信息技术与安全科学引用本文复制引用
王小立,刘志远,温靖华..一种电炉变压器中性点横差保护方案研究[J].宁夏电力,2013,(1):7-10,4.
