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The Optimization of Mechanical Phase-Shifting Transformer Tap Positions Based on an Open-Loop and Closed-Loop Hybrid Strategy

Jinjiao Lin, Jingyan Du, Shi Chen, Xinying Wang, Haodong Long and Chuyang Wang ()
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Jinjiao Lin: State Grid Jiangsu Electric Power Co., Ltd., Research Institute, Nanjing 211103, China
Jingyan Du: School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
Shi Chen: State Grid Jiangsu Electric Power Co., Ltd., Research Institute, Nanjing 211103, China
Xinying Wang: School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
Haodong Long: School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China
Chuyang Wang: School of Electrical and Power Engineering, Hohai University, Nanjing 211100, China

Energies, 2025, vol. 18, issue 14, 1-15

Abstract: Phase-shifting transformers play a crucial role in power grid stability and efficiency. They adjust phase differences between loads, improve transmission efficiency, and balance loads during large-scale power transmission and grid integration. However, traditional mechanical phase-shifting transformers use fixed-tap designs with limited taps, preventing continuous and precise adjustments. This discrete adjustment method affects control accuracy and optimal tap position selection for proper power flow. This paper proposes a hybrid open-loop and closed-loop control strategy. This strategy maintains the phase-shifting transformer at its optimal tap position, enhancing system regulation precision and control effectiveness.

Keywords: mechanical phase-shifting transformer; tap position optimization; power transmission efficiency; closed-loop control; power 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: 2025
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