Improved Predictive Model Controller for Voltage Regulation in Standalone Power Generation System

摘要

This paper discusses an improved predictive model control strategy with a prediction horizon of one sampling time for three phase pulse width modulation (PWM) converter used for standalone power generation system in the presence of sudden load disturbances and sampling time variations. The proposed control law uses the system model to predict directly the behavior of the output voltage at each sampling prediction interval for all switching state. Next, a cost function is evaluated as a criterion to choose the switching state that will be applied in the next sampling prediction instant. To regulate constant and sinusoidal the AC voltage at the point common coupling (PCC), an LRC high harmonics filter is used in the output of the PWM converter for the power quality improvement. The performances of the proposed system and their control strategies are verified using MATLAB/Simulink.