Abstract
To enhance the operational reliability of wireless power supply systems for transmission line monitoring devices and to facilitate bidirectional communication between the power transmitter and receiver, this study proposes a simultaneous wireless power and data transfer (SWPDT) scheme employing a multi-relay coil configuration. By exploiting the multi-resonant behavior inherent in high-order compensation topologies—specifically LCC and LCL structures—the proposed system realizes efficient co-transmission of energy and information. A comprehensive power transmission model, alongside an equivalent circuit model for data communication, is developed to capture the electromagnetic coupling and transmission dynamics within the multi-relay environment. The characteristics of both power and data channels are analytically examined, and the validity of the proposed methodology is substantiated through simulation studies. The results confirm that the system achieves robust power delivery while maintaining reliable data transmission, thereby offering a promising solution for deployment in high-voltage insulator string scenarios.
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