Author:
Xu Aidong,Li Licheng,Li Peng,Wang Zhiming,Wu Zhibing,Hao Changjin
Abstract
Abstract
High-performance sensors and high-efficiency and accurate measurement technology are the basis of power grid control, monitoring, analysis and decision-making. Current monitoring devices commonly used in power systems cannot meet the need for simultaneous measurement of steady-state current and transient current. In this paper, a high-performance current sensor based on giant magnetoresistance sensor is developed, and key technologies such as sensor structure, sensor chip selection, signal processing circuit and electromagnetic compatibility are designed. The experimental results show that the micro current sensor can accurately measure the steady-state current of 1000A and the transient current of 20kA. At the same time, it has the advantages of small size, high sensitivity, large measurement range, convenient installation and high integration, which meets the measurement requirements of smart grid.
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