高压电器2017，Vol.53Issue(8)：159-165,172,8.DOI:10.13296/j.1001-1609.hva.2017.08.027
基于多台不同变压器的直流偏磁抑制措施研究
Study on DC Bias Suppression Measures Based on Multiple Different Transformers
摘要
Abstract
In this paper,a substation which contains AC transformers and converter transformers is treated as typical example that a substation contains multiple different transformers.In the case of the presence of the bias current,DC bias current in every transformer neutral point distribution is calculated in detail,in which the DC bias current in AC transformers' neutral point is about 2 times of the DC bias current in converter transformers' neutral point.The main DC bias suppression measures are briefly introduced,the corresponding suppression measures are applied only to AC transformers which is used to suppress the DC bias in the entire substation.Finally,this paper takes a practical DC project as basis to build in a detailed electromagnetic transient model.The following results can be obtained through simulation:the corresponding suppression measures are only applied to AC transformers can effectively inhibit the DC bias in the entire substation.Considering the variety of factors,the method of connecting series capacitor in the AC transformers' neutral point is chosen to suppress the DC bias in the entire substation.关键词
直流偏磁/偏磁电流/抑制措施/变压器中性点/电磁暂态Key words
DC bias/bias current/suppression measures/transformer neutral point/electromagnetic transient引用本文复制引用
王渝红,欧林,张超,李兴源,张功望,杨东斌..基于多台不同变压器的直流偏磁抑制措施研究[J].高压电器,2017,53(8):159-165,172,8.基金项目
国家重点基础研究发展计划项目(2013CB228204).Project Supported by National Program on Key Basic Research Project of China(2013CB228204). （2013CB228204）
