State Grid Jiangsu Electric Power Company

State Grid Jiangsu Electric Power Co., Ltd. Research Institute

Nanjing Dnn Technology Co., Ltd

Jiangsu Electric Power Research Institute Corporation Limited

Caibo Liao

Yang Liu

Shu Chen

Jiansheng Li

Fengbo Tao

Chao Wei

Hairong Wei

Yiming Wu

Xiaoping Yang

Jieqing Deng

Peng Wu

Xu Wei

Tianxi Xie

Shengquan Wang

Yuncai Lu

Ruibin Li

The present invention discloses a device for evaluating and demagnetizing residual magnetism quantity of a power transformer. A main circuit comprises a switching power supply the two ends of which are respectively connected with a filter capacitor and a resistor in parallel. A forward end of the switching power supply is connected with a main switch in series. A rear end of the main switch is connected with a series branch of a sixth switch and a first resistor, a series branch of a first switch and a second switch, and a series branch of a third switch and a fourth switch are connected in parallel. A driving circuit is respectively connected with driving ends of the main switch, the sixth, first, second, third and fourth switches. A control circuit is connected with the driving circuit for sending an instruction to the driving circuit.

Device for evaluating and demagnetizing residual magnetism quantity of power transformer and control method thereof

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Jiangsu, China

Caibo Liao