Maximum Tracking Control for Induction Power Taking of 500kV Overhead Transmission Line

The 500kV overhead transmission line induction power supply technology can provide stable and reliable power for high-voltage line online equipment and inspection robots. Since the magnitude of the induced current induced in the ground wire is small, in order to make full use of the induced energy, the principle of impedance matching can be used according to the topology of the circuit to increase the power drawn from the induction. This article focuses on the operating environment of 500kV overhead transmission lines, and designs a typical induction power circuit structure consisting of a power coil, a rectifier filter circuit, and a two-level DC-DC converter circuit. Based on this simplified equivalent circuit model, this paper designs the controller of the two-level DC-DC converter circuit, and realizes the maximum power point tracking (MPPT) control of inductive power draw by changing its duty cycle. Finally, the simulation results on the Simulink platform verify the accuracy of the simplified circuit model and the effectiveness of the maximum power point tracking control method.