Performance Analysis of PI and MPC Controllers for Grid-Connected System

In an era marked by increasing integration of renewable energy sources and heightened demands for grid reliability, the effectiveness of control strategies in grid-connected power converters stands as a pivotal concern. This research paper conducts a comprehensive comparative analysis of two prevalent controller types, the traditional proportional-integral (PI) controller and the advanced model predictive control (MPC) controller, in the context of grid-connected power converters. Through rigorous simulations and performance evaluations, this study scrutinizes the dynamic behaviour, response to grid disturbances, harmonic mitigation capability, and overall operational efficiency of both controller types. Our findings shed light on the distinctive strengths and limitations of PI and MPC controllers, providing valuable insights for power system engineers and researchers. With the use of MPC controller the THD is reduced to as low as 0.32% compared to PI controller with THD = 25.13% for the same parameter set of values. This research not only contributes to the enhancement of grid-connected power converter technology but also serves as a stepping stone towards more efficient and reliable power systems amidst the dynamic landscape of modern electricity grids.