基于磁电阻传感器的配电柜铜排电流测量方法

Current Measurement Method of Copper Bar in Distribution Cabinet Based on Magnetoresistance Sensor

磁电阻传感技术为电力系统电流测量提供了一种新的技术手段。针对配电柜铜排,分析了通流铜排的磁场分布特征,提出了一种无需固定铜排与传感器位置的电流测量方法,详细推导了测量原理,并提出了一种抗空间磁场干扰的方法。在MATLAB环境下建立了仿真模型,对测量原理进行了仿真,仿真结果验证了测量原理的正确性。对传感器位置偏差、铜排厚度、空间干扰磁场等多种影响测量精度的因素进行了仿真分析,仿真结果验证了所提抗干扰方法的有效性和测量方法的实用性。

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.