This paper proposes a main transformer DC magnet bias monitoring system based on neutral point current,transformer temperature information,and noise signals.The neutral point current of the main transformer is collected using a flexible optical current transformer,which solves the problems of low accuracy,easy interference,and insulation difference in traditional Hall element measurement of neutral point current.The system comprehensively utilizes various detection signals such as neutral point current,temperature,and noise.It can detect abnormal situations of DC magnet bias in the main transformer and facilitate users to collect a large amount of first-hand information,laying a foundation for in-depth research on DC magnet bias suppression in the main transformer.In addition,this scheme has good applicability and can be pro-moted to substations and power plants with similar risks.
关键词
直流偏磁检测/霍尔元件/柔性光学电流互感器
Key words
DC magnet bias detection/Hall element/flexible optical current transformer
维普
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