An Active Electric Field Energy Harvester For Overhead Lines

This paper analyzes the energy harvesting principle of the capacitive voltage-divider harvester. And introduces the concept of actively adjusting the equivalent impedance of the subsequent circuit through a full-bridge configuration to match the harvester’s impedance, thereby achieving maximum power transmission. Furthermore, a maximum power point tracking algorithm is proposed, which eliminates the need for voltage transformers and enhances the harvester’s usability. Additionally, a harvester capable of harvesting 2. 7W of power is designed. Simulation results validate that impedance matching between the harvester and the load can be achieved by actively adjusting the equivalent load resistance through the full-bridge configuration.