A Predictive Current Regulator Using Linear Neural Networks For Three-phase Voltage Source PWM-Inverter

This paper presents a predictive control strategy based on linear neural networks for the current control of a three-phase voltage source PWM-inverter. The base of this regulator is a conventional deadbeat control loop which ensures the relatively good dynamic performance of system. However, because of the inherent characteristic of deadbeat control, existing time delay between system reference input and actual output, therefore causes the steady state error when the input is sinusoidal. To eliminate this error, a novel predictive control method is presented in this paper. Based on the deadbeat controller, two sinusoidal predictors implemented by linear neural networks are further introduced for the predictions of reference current and the AC side voltage respectively. As a result, the time delay and steady state error are minimized to almost zero. Simulation results are presented to verify the effectiveness of the proposed algorithm.