Optimisation design of real-time wireless power supply system overhead high-voltage power line

• Published in: IET electric power applications Vol. 13; no. 2; pp. 206 - 214
• Main Authors: Wang, Wei, Zhu, Zhongbin, Wang, Qi, Hu, Minqiang
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 01.02.2019
• Subjects: AC–DC voltage‐doubling rectifier circuit; charging threshold voltage; coils; energy harvesting; energy harvesting devices; HVPL insulation distance; inductive power transmission; maximum output power; monitoring equipment; online energy harvesting device; optimisation; optimisation design; power lines; power supplies to apparatus; power supply scheme; real‐time wireless power supply system overhead high‐voltage power line; rectifying circuits; Research Article; specific device structure; wireless power supply efficiency; wireless power transfer system; WPT system; coils; wireless power supply efficiency; optimisation design; energy harvesting; energy harvesting devices; WPT system; HVPL insulation distance; specific device structure; wireless power transfer system; optimisation; real-time wireless power supply system overhead high-voltage power line; rectifying circuits; online energy harvesting device; maximum output power; power supply scheme; power lines; AC–DC voltage-doubling rectifier circuit; monitoring equipment; inductive power transmission; power supplies to apparatus; charging threshold voltage
• ISSN: 1751-8660; 1751-8679; 1751-8679
• DOI: 10.1049/iet-epa.2018.5498

Efficient and reliable power supply has been considered as the fundamentality of applying monitoring equipment overhead high-voltage power line (HVPL). Several kinds of energy harvesting devices are investigated and compared. A new power supply scheme, which integrates the online energy harvesting device and the wireless power transfer (WPT) system, is presented. Optimisation design of online energy harvesting device is analysed emphatically by taking both HVPL insulation distance and wireless power supply efficiency into account. For further increasing the harvested energy from power lines, this study discusses the design of specific device structure and the accurate calculation of maximum output power. It is found that essential parameters and exciting current angle contribute to more extracting energy. Meanwhile, in order to expand the transmitting distance with high efficiency, the WPT system with double relay coils is selected. The charging threshold voltage of the load can be further optimised under different transmitting distances by adopting an AC–DC voltage-doubling rectifier circuit. Simulation and experimental studies show that when the transmitting distance is >1 m, the monitoring equipment can also be charged in a reliable way, which also verifies the correctness and feasibility of the system.