Three-Phase Unbalance Improvement for Distribution Systems Based on the Particle Swarm Current Injection Algorithm

Chien-Kuo Chang, Shih-Tang Cheng and Bharath-Kumar Boyanapalli
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Chien-Kuo Chang: Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan
Shih-Tang Cheng: Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan
Bharath-Kumar Boyanapalli: Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei City 106, Taiwan

Energies, 2022, vol. 15, issue 9, 1-16

Abstract: The aim of this study is to improve the three-phase unbalanced voltage at the secondary side of a distribution transformer. The proposed method involves compensation sources injecting three different single-phase currents into the connected point of a grid. The computations of optimal single-phase currents are performed using the circuit analysis method and particle swarm optimization algorithm. An unbalanced three-phase power distribution system model is constructed, including a transformer Δ–Δ connection, V–V connection, load balance, load unbalance combination, and three single-phase compensation current sources. The results show that the voltage unbalance rate of the electricity user side is improved to less than 1%, and the three-phase total compensation apparent power is approximately 0 VA. In the future, the application of the model as an auxiliary service could be achieved by adding an energy storage system.

Keywords: three-phase unbalance; particle swarm optimization; current injection; power quality; distribution systems (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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