Research and design of multi‐stage multi‐load wireless power supply system for high voltage online monitoring equipment

IF 1.8 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Circuit Theory and Applications Pub Date : 2024-08-12 DOI:10.1002/cta.4212

Jianghua Lu, Yineng Gui

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引用次数: 0

Abstract

Many online monitoring devices in substations are placed at high potential differences from the ground, and it is not possible to supply power to these devices directly from the ground through wires. Placing magnetically coupled structures inside the substation pillar insulators for inductive power transfer is considered a feasible solution, and at this stage of research, systems that add multi‐stage repeating coil structures are mostly used to achieve stable power supply for individual online monitoring devices. However, the monitoring point generally requires multiple devices to monitor together, and the power requirements of different devices are different, so adding multiple repeating coils at the same time will increase the complexity of the system design, which is not conducive to engineering applications. Therefore, this paper designs and optimizes a multi‐stage multi‐load wireless power supply system magnetic coupling structure, using a three‐dimensional hollow solenoid combined with a ferrite core as the system repeating coil structure and an embedded magnetic coupling structure as the receiver end structure to reduce the number of system repeating coils while supplying power to devices with different power requirements. A prototype with a transmission distance of 1.02 m was built in the experiment, and the experimental results showed that the highest transmission efficiency of the system was 44.3% and 39.2% under single load and double load conditions, respectively. As the load resistance increases, the system can achieve constant voltage output under both single‐load and dual‐load operating conditions. Adjusting the number of turns of the receiving coil can change the output characteristics of the system and achieve constant voltage output of different voltage levels or constant current output of different current levels, which can meet the power supply needs of different loads.

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高压在线监测设备多级多负载无线供电系统的研究与设计

变电站中的许多在线监测设备都放置在与地面电位差较大的地方，不可能通过导线直接从地面向这些设备供电。在变电站支柱绝缘子内放置磁耦合结构进行感应式电力传输被认为是一种可行的解决方案，现阶段的研究大多采用增加多级重复线圈结构的系统来实现对单个在线监测设备的稳定供电。然而，监控点一般需要多个设备共同监控，不同设备对电源的要求也不同，同时增加多个重复线圈会增加系统设计的复杂性，不利于工程应用。因此，本文设计并优化了一种多级多负载无线供电系统磁耦合结构，以三维空心螺线管结合铁氧体磁芯作为系统中继线圈结构，以嵌入式磁耦合结构作为接收端结构，在减少系统中继线圈数量的同时，为不同功率要求的设备供电。实验中制作了传输距离为 1.02 米的原型，实验结果表明，在单负载和双负载条件下，系统的最高传输效率分别为 44.3% 和 39.2%。随着负载电阻的增大，系统在单负载和双负载工作条件下都能实现恒压输出。调整接收线圈的匝数可以改变系统的输出特性，实现不同电压等级的恒压输出或不同电流等级的恒流输出，从而满足不同负载的供电需求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Circuit Theory and Applications 工程技术-工程：电子与电气

CiteScore

3.60

自引率

34.80%

发文量

277

审稿时长

4.5 months

期刊介绍： The scope of the Journal comprises all aspects of the theory and design of analog and digital circuits together with the application of the ideas and techniques of circuit theory in other fields of science and engineering. Examples of the areas covered include: Fundamental Circuit Theory together with its mathematical and computational aspects; Circuit modeling of devices; Synthesis and design of filters and active circuits; Neural networks; Nonlinear and chaotic circuits; Signal processing and VLSI; Distributed, switched and digital circuits; Power electronics; Solid state devices. Contributions to CAD and simulation are welcome.