Abstract:Transformer is one of the most important elements in power system, and current differential protection has been the main protection technique for transformer unit. This protection technique, however, suffers a low sensitivity or reliability due to the problems such as CT saturation and transformer magnetizing inrush. Based on digital substation system, studies have found that the fault generated electric quantities can not only be used by the relay to achieve the line protection but also used for developing tr… Show more
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