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1. 发明授权

US06731481B2 Relaying method for protecting transformers 失效
标题翻译：保护变压器的中继方法
公开(公告)号：US06731481B2
公开(公告)日：2004-05-04
申请号：US10001599
申请日：2001-10-23
申请人： Yong Cheol Kang , Sang Hee Kang , Byung Eun Lee , Jae Sung Yun , Seung Hun Ok
发明人： Yong Cheol Kang , Sang Hee Kang , Byung Eun Lee , Jae Sung Yun , Seung Hun Ok
IPC分类号： H02H704
CPC分类号： H02H7/0455 , H02H6/005
摘要： The present invention relates to a relaying method using the ratio of induced voltages or the ratio of flux linkage increments. The protective relaying method for power transformers with one or more phases includes the first step of obtaining primary and secondary voltages and currents of the transformer; the second step of calculating induced voltages, induced voltage differences, ratio of primary and secondary induced voltages, or ratio of primary and secondary induced voltage differences from the currents and the voltages; the third step of calculating at least one predetermined decision parameter derived from at least one predetermined equation; the fourth step of deciding whether an internal winding fault occurs by comparing the decision parameter to the induced voltages, the induced voltage differences, the ratio of primary and secondary induced voltages, or the ratio of primary and secondary induced voltage differences.
摘要翻译：本发明涉及使用感应电压比或磁链增量比的中继方法。具有一个或多个相的电力变压器的保护继电方法包括获得变压器的初级和次级电压和电流的第一步骤; 计算感应电压，感应电压差，初级和次级感应电压的比率或初级和次级感应电压差与电流和电压的比率的第二步; 计算从至少一个预定方程导出的至少一个预定决定参数的第三步骤; 通过将判定参数与感应电压，感应电压差，初级和次级感应电压的比率或初级和次级感应电压差的比值进行比较来决定是否发生内部绕组故障。

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