Research on Power Supply Strategy of Multibattery Load WPTS³ Based on Tower Insulator

With the intelligent development of smart power grids, the monitoring and maintenance of high-voltage transmission towers is subject to more stringent requirements. As an important part of the transmission tower, condition monitoring of insulators is critical for ensuring the safety of the power grid. However, existing traditional power sources, such as photovoltaic or wind energy, cannot reliably supply power to the battery modules. To solve this problem, a wireless power transfer and supply synchronization system (WPTS3) based on composite insulators is proposed in this paper, which can realize the reuse of the power consumption and energy transmission of a single load coil. Furthermore, a solution for multi-node wireless power transmission is provided that uses an almost constant current or constant voltage to provide multi-node power transmission under system characteristics. Moreover, to achieve a stable energy supply for multiple nodes over medium and long distances, a time-sharing load-launch linkage manipulation strategy that controls the resonant frequency of the system in a closed loop to achieve frequency switching under dynamic load changes is provided. Finally, the stability of the system is verified by building an 8-coil multi-node wireless power transfer (WPT) transmission network. Compared to traditional meter-level WPT systems, the time-sharing linkage of loads and synchronization of energy supply and transmission, while ensuring high transmission efficiency, are achieved. Interference is avoided to ensure the safety and stability of the power supply for the electrical equipment at each node.