摘 要：受制于高电位绝缘安全问题，输电线路的状态监测传感器一直难以使用常规低压电源，迫切需要寻求可靠的自取 能方法用作传感器的供电方案。文章提出了一种可贴装于母线排上的高电位磁场取能电源，通过感应母排周围的磁场获取电能，不存在绝缘问题，同时不会缩减相间安全距离，更适用于变电站和配电室中排列紧凑的三相母线桥。仿真及带载试验表明，设计的高电位磁场取能电源能够在母排电流为 400 A ～ 1 000 A 的范围内为负载提供 3 V 的稳定电压，输出功率达 360 mW，能够满足低功耗在线监测传感器应用的能量需求。
关键词：高电位；磁场取能；取能线圈；电源管理
DOI:10.19850/j.cnki.2096-4706.2022.08.017
中图分类号：TM55 文献标识码：A 文章编号：2096-4706（2022）08-0060-03
Design and Research of a Magnetic Energy Harvesting Power Supply in High Potential Side
WU Junfeng1, LIU Wei 1, YANG Feng2
(1. Wuxi Power Supply Branch of State Grid Jiangsu Electric Power Co., Ltd., Wuxi 214072, China; 2.CET-College of Engineering and Technology, Southwest University, Chongqing 400100, China)
Abstract: Restricted by the safety problem of high potential side insulation, the status monitoring sensor of the electric transmission line has been difficult to use the conventional low-voltage power supply, so it is urgent to seek the reliable self-energy harvesting method as the power supply scheme of the sensor. This paper proposes a kind of magnetic field energy harvesting power supply on the high potential side, which is able to be attached on the bus bar. It obtains electricity by sensing the magnetic field around the bus bar and there is no insulation problem. It will not reduce the alternate safety distance at the same time, and it is more suitable for the compact three-phase bus bar bridge in the substation and distribution room. Simulation and onload experiments show that the designed high potential side magnetic field energy harvesting power supply can provide 3 V stable voltage for the load in the range of 400 A ～ 1 000 A, the output power can reach 360 mW. It can meet the energy needs of low-power consumption online monitoring sensor applications.
Keywords: high potential side; magnetic energy harvesting; energy harvesting coil; power management
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作者简介：吴俊锋（1989.11—），男，汉族，江苏宜兴人，工程师，硕士研究生，主要研究方向：电力设备状态监测及故障诊断。