摘要
针对各变压器保护制造厂只设计了YNd11,YNd1和YNy12这3种变压器接线组别及其接线组合的变压器差动保护电流软件相位补偿,没有设计其他接线组别和接线组合方式变压器差动保护电流软件相位补偿的情况,通过分析YNd3,YNd7,YNd5、YNd9等接线变压器d侧各相电流相位与YNd11变压器或YNd1变压器d侧各相电流相位规律,提出了改变变压器保护外部电流回路接线,使YNd3,YNd7接线或YNd5,YNd9接线变压器差动保护的电流相位补偿问题转变为YNd11接线或YNd1接线变压器差动保护的电流相位补偿问题,再利用已有的变压器差动保护电流软件相位补偿实现了YNd3,YNd7,YNd5,YNd9等接线变压器差动保护的电流相位补偿。通过一个实例证明了该方案是可行的。
Transformer factories only design differential protection current software phase compensation for three kinds of transformer wiring groups, namely YNd11, YNd1 and YNy12, and their combinations, Currently, There isn＇t differential protection current software phase compensation for other transformer wiring groups and combinations. Through analyzing the changing law between the d side current phase of YNd3, YNd7, YNd5, YNd9, YNd11 and YNd1 transformers, this paper proposes to change transformer protection＇s external current circuit wiring to transfer the differential protection current phase compensation of YNd3, YNd7, YNd5, YNd9 wiring transformers to YNd11 or YNd1 wiring transformers. Then through reusing the existing transformer differential protection current software phase compensation, YNd3, YNd7, YNd5, YNd9 and other wiring transformers differential protection current phase compensation can be achieved. Reality application shows that the scheme is correct.
出处
《江苏电机工程》
2016年第2期34-38,共5页
Jiangsu Electrical Engineering
关键词
YNd系列变压器
差动保护
电流相位
补偿
YNd series transformer
differential protection
current phase
compensation
