摘要
根据变压器微机差动保护可以直接在显示屏上查询各相的差动电流I_d和制动电流I_(zd)的特性,提出了一种分析差动电流I_d和制动电流I_(zd)显示值,方便快速地判定高低压侧二次电流的极性和相位关系,防止因接线错误而产生保护误动的新方法。
Many numerical differential protection devices for transformer can show the current magnitudes, phase angles, differential and restraint currents now. The paper introduces a new way through which we can check the connection of transformer＇s second current, including polarity and phase of the current, by analyzing the differential and restraint currents. So we can prevent the incorrectly trip because of the error connection of the second current.
出处
《电工技术》
2006年第9期25-26,共2页
Electric Engineering
关键词
微机型变压器差动保护
差动电流Id和制动电流Izd
二次接线判定
Numerical differential protection for transformer Differential and restraint currents Connection of the second current
