Overview of Power Hardware-in-the-Loop Simulation Towards Implementation of Digital Controller for Resonant Inverters

This paper gives an overview of hardware-in-the-loop (HIL) simulation mainly used for design, development, analysis, and testing of different power systems and their components. These power HIL simulations are real-time simulations that combine both hardware and software testing in a closed loop configuration. This work outlines the evolution of power system testing approaches, various PHIL implementation requirements such as, digital real-time simulator (DRTS) and different interfacing techniques. In order to verify the proposed hardware and software for HIL testing, an experimental set-up of full-bridge voltage source inverter is developed, having series resonance load, mainly used in induction heating applications. Its digital control is implemented using field programmable gate array (FPGA). Simulation results and experimental results are presented to validate the HIL system.