电容耦合谐振式高压无线输电系统的设计与实施  

Design and implementation of capacitive power transfer system based on resonance coupling on high voltage power transmission lines

作　　者：喻晓炜[1] 胡琰锋 高星冉 郑志强[1] 秦金垒 张兴豪 Yu Xiaowei;Hu Yanfeng;Gao Xingran;Zheng Zhiqiang;Qin Jinlei;Zhang Xinghao(Wuhan NARI Limited Liability Company of State Grid Electric Power Research Institute, Wuhan 430074, China;State Grid Xi’an Electric Supply Company, Xi’an 710015, China;School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072,China)

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [2]国网西安供电公司,西安710015 [3]武汉大学动力与机械学院,武汉430072

出　　处：《电测与仪表》2019年第8期64-72,共9页Electrical Measurement & Instrumentation

摘　　要：可靠的电源供应一直是限制输电线路在线监测系统广泛应用的瓶颈问题。为解决该问题,本文提出了一种新型的电容耦合谐振式无线能量传输系统。该系统利用高压线路与大地电位稳定的特点,构建虚拟回路,将传统的四极板耦合结构简化为双极板结构。同时,利用电荷分布在耦合极板上的边缘效应,进一步将全面板耦合极板简化为环形空心极板,使系统结构更为简洁,并具有良好的户外防风能力。本文建立了简化系统的电路模型,并对系统的功率、效率特性进行了分析。并且,通过多组对比实验对所提出的系统结构和电路模型的有效性进行了验证。理论和实验结果都表明了简化后的系统结构能有效地实现电能的无线传输,并且拥有比传统的双极板系统更高的传输效率和更远的传输距离。Reliable power supply has always been the key factor which restricts the wide-range application of on-line monitoring devices on power transmission lines. In order to solve this problem, a novel capacitive power transfer (CPT) system based on resonance coupling is proposed in this paper. By utilizing the transmission lines and the earth, whose potentials are robust, a virtual return route is established, and the conventional four-plate coupling structure is simplified to two-plate structure. Moreover, by using the fringe effect of the charge distribution on coupling plates, the full-area coupling plate is further simplified to annular air-core plate, which is more compact and more resistant to outdoor wind forces. The equivalent circuit model of the proposed CPT system is established, and the detailed system performance is analyzed. Several groups of experiments are conducted to verify the effectiveness of the proposed system structure as well as the circuit model. Both analytical and experimental results indicate that efficient wireless power transfer can be realized by using the simplified system structure, and higher transfer efficiency and larger transfer gap can also be achieved when compared with conventional four-plate CPT systems.

关 键 词：电容输电 电场耦合 无线能量传输 电容计算 

分 类 号：TM933[电气工程—电力电子与电力传动]