A Multirelay Wireless Power Transfer System With Double-Sided LCC Compensation Network for Online Monitoring Equipment
Xinyu Hou, Hongsheng Hu, Yugang Su, Zhe Liu, Zhipeng Deng, Renwei Deng
Abstract
A multirelay wireless power transfer (WPT) system with the double-sided inductor-capacitor-capacitor (LCC) compensation network for the online monitoring equipment on the high-voltage transmission line is proposed. Constant-voltage (CV) or constant-current (CC) output characteristics is achieved. The proposed topology does not use ferrite materials, and the LCC compensation networks are only utilized at the transmitter and the receiver. Each relay coil is only connected in series with one compensation capacitor. Three working modes are proposed according to the resonance conditions of Tx compensation network, Rx compensation network, and compensating capacitances of relay coils. CC and CV output characteristics in each mode are analyzed and compared by simulation in terms of system output attenuation with load changes and frequency sensitivity. The parameter design process is given. A six-coil experimental prototype is built to validate the correctness and feasibility of the theoretical analysis.