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Coordinated Planning of Unbalanced Flexible Interconnected Distribution Networks Based on Distributed Optimization.

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Title: Coordinated Planning of Unbalanced Flexible Interconnected Distribution Networks Based on Distributed Optimization.
Authors: Zhu, Jinghua1 (AUTHOR), Liu, Zhaoxi1 (AUTHOR) liuzhaoxi@scut.edu.cn, Dai, Fengzhe1 (AUTHOR), Ou, Weiliang1 (AUTHOR), Jiao, Yuanchen1 (AUTHOR), Xiang, Yu1 (AUTHOR)
Source: Energies (19961073). Apr2026, Vol. 19 Issue 7, p1769. 30p.
Subject Terms: *Electric power system planning, *Distributed algorithms, *Power supply quality, *Cost allocation, *Battery storage plants, *Economic efficiency
Abstract: Rapid increases in distributed photovoltaic (PV) penetration have brought additional challenges to distribution network planning and operation. Meanwhile, flexible interconnection devices such as soft open point integrated with battery energy storage system (E-SOP) can significantly enhance the regulatory capability and operational adaptability of the distribution system and have been widely applied in recent years. First, to improve both economic performance and voltage quality, a coordinated planning method for the multi-region flexible interconnected distribution system based on E-SOP is proposed. Second, with the ongoing growth of interconnected distribution networks, centralized optimization methods exhibit limitations in computational efficiency and privacy protection. To address this, the planning model is decomposed into several subproblems by applying the Alternating Direction Method of Multipliers (ADMM), allowing each region to optimize its local subproblem in a fully distributed manner. Additionally, a Shapley value-based cost allocation mechanism is applied to ensure fair and rational cost distribution among different distribution networks. Finally, case studies are conducted to validate the effectiveness of the proposed method. Case studies show that the proposed method reduces the system's total annual cost by 14.90% and the electricity purchase cost by 28.61% compared with the pre-planning case. Meanwhile, the maximum voltage imbalance is reduced to within the standard range. These results validate the effectiveness of the proposed method in enhancing both economic efficiency and power quality for flexible interconnected distribution systems. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 192959173
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Coordinated Planning of Unbalanced Flexible Interconnected Distribution Networks Based on Distributed Optimization.
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  Data: <searchLink fieldCode="AR" term="%22Zhu%2C+Jinghua%22">Zhu, Jinghua</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Zhaoxi%22">Liu, Zhaoxi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> liuzhaoxi@scut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Dai%2C+Fengzhe%22">Dai, Fengzhe</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ou%2C+Weiliang%22">Ou, Weiliang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiao%2C+Yuanchen%22">Jiao, Yuanchen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiang%2C+Yu%22">Xiang, Yu</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Apr2026, Vol. 19 Issue 7, p1769. 30p.
– Name: Subject
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  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Electric+power+system+planning%22">Electric power system planning</searchLink><br />*<searchLink fieldCode="DE" term="%22Distributed+algorithms%22">Distributed algorithms</searchLink><br />*<searchLink fieldCode="DE" term="%22Power+supply+quality%22">Power supply quality</searchLink><br />*<searchLink fieldCode="DE" term="%22Cost+allocation%22">Cost allocation</searchLink><br />*<searchLink fieldCode="DE" term="%22Battery+storage+plants%22">Battery storage plants</searchLink><br />*<searchLink fieldCode="DE" term="%22Economic+efficiency%22">Economic efficiency</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Rapid increases in distributed photovoltaic (PV) penetration have brought additional challenges to distribution network planning and operation. Meanwhile, flexible interconnection devices such as soft open point integrated with battery energy storage system (E-SOP) can significantly enhance the regulatory capability and operational adaptability of the distribution system and have been widely applied in recent years. First, to improve both economic performance and voltage quality, a coordinated planning method for the multi-region flexible interconnected distribution system based on E-SOP is proposed. Second, with the ongoing growth of interconnected distribution networks, centralized optimization methods exhibit limitations in computational efficiency and privacy protection. To address this, the planning model is decomposed into several subproblems by applying the Alternating Direction Method of Multipliers (ADMM), allowing each region to optimize its local subproblem in a fully distributed manner. Additionally, a Shapley value-based cost allocation mechanism is applied to ensure fair and rational cost distribution among different distribution networks. Finally, case studies are conducted to validate the effectiveness of the proposed method. Case studies show that the proposed method reduces the system's total annual cost by 14.90% and the electricity purchase cost by 28.61% compared with the pre-planning case. Meanwhile, the maximum voltage imbalance is reduced to within the standard range. These results validate the effectiveness of the proposed method in enhancing both economic efficiency and power quality for flexible interconnected distribution systems. [ABSTRACT FROM AUTHOR]
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        Value: 10.3390/en19071769
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      – Code: eng
        Text: English
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        PageCount: 30
        StartPage: 1769
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      – SubjectFull: Electric power system planning
        Type: general
      – SubjectFull: Distributed algorithms
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      – SubjectFull: Power supply quality
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      – SubjectFull: Cost allocation
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      – SubjectFull: Battery storage plants
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      – SubjectFull: Economic efficiency
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      – TitleFull: Coordinated Planning of Unbalanced Flexible Interconnected Distribution Networks Based on Distributed Optimization.
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            NameFull: Zhu, Jinghua
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            NameFull: Liu, Zhaoxi
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            NameFull: Dai, Fengzhe
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            NameFull: Ou, Weiliang
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            NameFull: Jiao, Yuanchen
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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              Value: 19
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            – TitleFull: Energies (19961073)
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