Hardware-In-The-Loop Simulation Approach for Grid Integration of a 2.2 kW Self-Excited Induction Generator Using Synchronous Reference Frame Theory

This paper explores the integration of a micro-hydro-based self-excited induction generator (SEIG) with the power grid to harness the advantages of renewable energy sources in the power sector. By incorporating renewable energy into the grid, significant enhancements can be achieved in terms of sustainability, economic viability, resilient capacity, and mitigation of power quality issues in generation and distribution. The study focuses on integrating a specific system comprising a 2.2 kW, 415-V, 50-Hz squirrel cage induction motor (SCIM) driving a three-phase SEIG. The MATLAB machine model is calibrated using machine parameters obtained through rigorous testing, including no-load characteristics, block rotor tests, magnetic saturation, and excitation capacitor calculations. A hydroelectric prime mover powers the SEIG realized with a 3.3 kW AC motor. Grid integration is facilitated through rectification and inversion operations employing an uncontrolled rectifier with a DC-link capacitor and a 6-pulse IGBT-based inverter. Switching operations utilize a voltage source converter (VSC) control topology based on synchronous reference frame theory. Simulations are conducted in the MATLAB/Simulink environment (R2018a version, 40,832,900), and the validity of the results is verified through real-time simulation using OPEL RT(OP4510). This investigation contributes to the understanding and implementation of micro-hydro-based self-excited induction generators for effective grid integration in the power sector.