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

Guofeng He, Shicheng Zheng, Yanfei Dong, Guojiao Li and Wenjie Zhang
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Guofeng He: School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
Shicheng Zheng: School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
Yanfei Dong: School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
Guojiao Li: School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China
Wenjie Zhang: School of Electrical and Control Engineering, Henan University of Urban Construction, Pingdingshan 467036, China

Energies, 2022, vol. 15, issue 15, 1-20

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

Keywords: uninterruptible power supply; extended-state observer; model predictive voltage control; cost function (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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