Multi-Level Dynamic Weight Optimization Scheduling Strategy for Flexible Interconnected Distribution Substations Based on Three-Port SNOPs

Dan Pang, Zhipeng Wang, Xiaomeng Shi, Jinming Ge (), Zhenhao Wang, Hongyin Yi, Yan Zhuang, Yu Yin and Wei Wang
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Dan Pang: State Grid Changchun Power Supply Company, Changchun 130021, China
Zhipeng Wang: State Grid Changchun Power Supply Company, Changchun 130021, China
Xiaomeng Shi: Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Jilin 132012, China
Jinming Ge: Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Jilin 132012, China
Zhenhao Wang: Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Jilin 132012, China
Hongyin Yi: State Grid Changchun Power Supply Company, Changchun 130021, China
Yan Zhuang: State Grid Changchun Power Supply Company, Changchun 130021, China
Yu Yin: Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Jilin 132012, China
Wei Wang: Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Jilin 132012, China

Energies, 2025, vol. 18, issue 10, 1-24

Abstract: By using a soft normal open point (SNOP) to connect multiple distribution networks to form a flexible interconnected distribution system (FIDS), the power distribution can be flexibly and controllably regulated among distribution stations, but it is also necessary to ensure the system’s operational efficiency and maintain voltage quality when carrying out optimal scheduling. In this paper, a FIDS optimal scheduling strategy considering dynamic weight grading is proposed. By considering the voltage overrun status of each distribution station area, the voltage level of each distribution station area is divided into three voltage overrun situations, including normal operation, safe boundary, and protection boundary levels, and an optimal scheduling model applicable to the multi-level operation of the FIDS is constructed. In order to adapt to the coordinated optimal operation objectives under different overrun levels, an optimal operation strategy considering the dynamic weights of system operation cost, voltage deviation, customer satisfaction, and SNOP regulation capability is proposed and finally simulated and verified using the improved IEEE33 node arithmetic case. The results verify the effectiveness of the method proposed in this paper in improving the system’s operational efficiency and node voltage quality.

Keywords: flexible interconnected distribution system (FIDS); soft normal open point (SNOP); optimal dispatch; dynamic weighting; overrun classification (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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