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A Novel Non-contact Measurement Method for the Detection of Current Flowing Through Concealed Conductors

  • Yang, Fan (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University Chongqing) ;
  • Liu, Kai (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University Chongqing) ;
  • Zhu, Liwei (State Grid Zhejiang Electric Power Company Metering Center) ;
  • Hu, Jiayuan (State Grid Zhejiang Electric Power Company Metering Center) ;
  • Wang, Xiaoyu (State Grid Zhejiang Electric Power Company Metering Center) ;
  • Shen, Xiaoming (State Grid Zhejiang Electric Power Company Metering Center) ;
  • Luo, Hanwu (Maintenance Branch of East Inner Mongolia Electric Power Company Limited) ;
  • Ammad, Jadoon (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University Chongqing)
  • Received : 2016.08.31
  • Accepted : 2016.12.26
  • Published : 2017.03.31

Abstract

In order to detect the current flowing through concealed conductor, this paper proposes a new method based on derivative method. Firstly, this paper analyzes the main peak characteristic of the derivative function of magnetic field generated by a current-carrying conductor, and a relationship between the current flowing through the conductor and the main peak of the derivative function is obtained and applied to calculate the current. Then, the method is applied to detect the conductor current flowing through grounding grids of substations. Finally, the numerical experimental and field experiment verified the feasibility and accuracy of the method, and the computing results show that the method can effectively measure the conductor current of grounding grids with low error, and the error is within 5 %.

Acknowledgement

Supported by : National Natural Science Foundation of China, Chongqing University

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