Study of a simple control strategy for grid connected VSI using SVPWM and p-q theory

This paper investigates the operation of a Distributed Generation (DG) unit which is connected via a three-phase voltage-source inverter to the distribution grid. The current control method with Space Vector pulse width modulation (SVPWM) is examined and compared to other current control methods. The strategy, which has been developed to control the reactive power and have a better utilization of DG unit, uses the p-q theory to achieve uninterrupted compensation of the reactive power of the system. A PI controller is used to control the active power and regulate the voltage of the capacitor. Finally, the proposed electrical power system is simulated on the computer and the steady-state and dynamic response of the system is evaluated.