Current Measurement Method of Copper Bar in Distribution Cabinet Based on Magnetoresistance Sensor
Bing TIAN , Peng LI , Zhiyong YUAN , Licheng LI , Li YU , Yuehuan LIN , Quan XU , Hao BAI , Zhiming WANG , Zhibing WU , Zhe MING
›› 2019, Vol. 13 ›› Issue (7) : 77 -83.
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Current Measurement Method of Copper Bar in Distribution Cabinet Based on Magnetoresistance Sensor
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Abstract
Magnetoresistance sensing technology provides a new technical means for current measurement in power system. For the copper bar of distribution cabinet, the magnetic field distribution characteristics of copper bar are analyzed. A current measurement method without fastening the copper bar and sensor position is proposed. The measuring principle is discussed in detail, and a method of resisting space magnetic field interference is proposed. The simulation model is established in the MATLAB environment, and the measurement principle is simulated. The simulation results verify the correctness of the measurement principle. The factors affecting the measurement accuracy such as sensor position deviation, copper bar thickness, space interference magnetic field and so on, are simulated and analyzed. The simulation results verify the effectiveness of the proposed anti-interference method and the practicability of the measurement method.
Keywords
magnetoresistance sensor / anti-interference / copper bar current measurement / distribution cabinet / tunnel magnetoresistance magnetic sensor
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