Neural Network Controlled Solar PV Battery Powered Unified Power Quality Conditioner for Grid Connected Operation

Okech Emmanuel Okwako, Zhang-Hui Lin (), Mali Xin, Kamaraj Premkumar and Alukaka James Rodgers
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Okech Emmanuel Okwako: Department of Electrical Engineering, School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Zhang-Hui Lin: Department of Electrical Engineering, School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Mali Xin: Department of Electrical Engineering, School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Kamaraj Premkumar: Department of Electrical and Electronics Engineering, Rajalakshmi Engineering College, Chennai 602105, India
Alukaka James Rodgers: Department of Electrical Engineering, School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Energies, 2022, vol. 15, issue 18, 1-18

Abstract: The Unified Power Quality Conditioner (UPQC) is a technology that has successfully addressed power quality issues. In this paper, a photovoltaic system with battery storage powered Unified Power Quality Conditioner is presented. Total harmonic distortion of the grid current during extreme voltage sag and swell conditions is more than 5% when UPQC is controlled with synchronous reference frame theory (SRF) and instantaneous reactive power theory (PQ) control. The shunt active filter of the UPQC is controlled by the artificial neural network to overcome the above problem. The proposed artificial neural network controller helps to simplify the control complexity and mitigate power quality issues effectively. This study aims to use a neural network to control a shunt active filter of the UPQC to maximise the supply of active power loads and grid and also used to mitigate the harmonic problem due to non-linear loads in the grid. The performance of the model is tested under various case scenarios, including non-linear load conditions, unbalanced load conditions, and voltage sag and voltage swell conditions. The simulations were performed in MATLAB/Simulink software. The results showed excellent performance of the proposed approach and were compared with PQ and SRF control. The percent total harmonic distortion (%THD) of the grid current was measured and discussed for all cases. The results show that the %THD is within the acceptable limits of IEEE-519 (less than 5%) in all test case scenarios by the proposed controller.

Keywords: shunt converter; unified power quality conditioner; total harmonic distortion; artificial intelligence; renewable energy system (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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