MATLAB Simulation Model for Three-Phase Grid-Tied Inverter with Current Hysteresis Control

This document presents a MATLAB/Simulink implementation of a three-phase grid-tied inverter utilizing current hysteresis control methodology. The primary objective of this simulation model is to analyze the dynamic behavior of grid-connected inverters and investigate how various control parameters impact system performance. The model incorporates critical electrical parameters including DC-link voltage characteristics, phase current measurements, and hysteresis band settings, implementing a robust control algorithm that continuously compares actual currents with reference values and triggers switching actions when errors exceed predefined hysteresis boundaries. The simulation framework enables comprehensive performance validation to ensure operational safety and efficiency compliance. Key MATLAB functions and Simulink blocks employed include current measurement subsystems, hysteresis comparators, PWM generation modules, and grid synchronization algorithms. Simulation results facilitate optimization of control parameters such as hysteresis band width and switching frequency, ultimately enhancing inverter reliability and power quality. This model serves as an effective educational tool for power electronics training, demonstrating practical implementation of hysteresis control theory through customizable parameter tuning and real-time performance monitoring capabilities.