Assessment of Voltage Imbalance Improvement and Power Loss Reduction in Residential Distribution Systems in Taiwan

Nien-Che Yang, Yan-Lin Zeng and Tsai-Hsiang Chen
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Nien-Che Yang: Department of Electrical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, Taipei 10607, Taiwan
Yan-Lin Zeng: Department of Electrical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, Taipei 10607, Taiwan
Tsai-Hsiang Chen: Department of Electrical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, Taipei 10607, Taiwan

Mathematics, 2021, vol. 9, issue 24, 1-17

Abstract: In this study, the non-dominated sorting genetic algorithm II (NSGA-II) is used to optimize the annual phase arrangement of distribution transformers connected to primary feeders to improve three-phase imbalance and reduce power loss. Based on the data of advanced metering infrastructure (AMI), a quasi-real-time ZIP load model and typical sample distribution systems in Taiwan are constructed. The equivalent circuit models and solution algorithms for typical distribution systems in Taiwan are built using the commercial software package MATLAB. A series of simulations, analyses, comparisons, and explorations is executed. Finally, the quantitative evaluation results for improving the voltage imbalance and reducing the power loss are summarized. For the series of studies, the percentage reductions in (1) total power imbalance T S I , (2) total line loss T L L , (3) average voltage drop A V D , (4) total voltage imbalance factors for zero/negative sequences T d 0 / T d 2 , and (5) neutral current of the main transformer I L C O are up to 45.48%, 4.06%, 16.61%, 63.99%, 21.33%, and 88.01%, respectively. The results obtained in this study can be applied for energy saving and can aid the authorities to implement sustainable development policies in Taiwan.

Keywords: conservation voltage regulation; distribution system; non-dominated sorting genetic algorithm; voltage imbalance (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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