Model Predictive Voltage Control of Uninterruptible Power Supply Based on Extended-State Observer

Finite-set model predictive controls have been widely used in inverter control because of the flexible target and no need a modulation unit. However, mismatching prediction parameters produces errors, resulting significant decline performance finite-set controls. Aiming at problem parameter mismatch, an extended-state observer was proposed to accurately estimate disturbance system this paper, obtained value added controller compensate for error achieve robustness. By constructing output voltage αβ coordinates, all possible values were predicted by using different vectors measurement values. A set that minimized cost function selected, its corresponding switching state applied next sampling period quality. Both simulation experimental results showed method based on can total quickly accurately, suppress influence capacitance disturbance, improve effect inverter.