ENHANCEMENT STRATEGY FOR DISTRIBUTED PHOTOVOLTAIC HOSTING CAPACITY IN POWER DISTRIBUTION NETWORKS BASED ON SPATIOTEMPORAL FLEXIBILITY OF ENERGY STORAGE SYSTEMS AND MULTI-PORT SOFT OPEN POINTS

Diao Hanbin; Liu Kang; Li Peiqiang; Xiao Jiajie

doi:10.19912/j.0254-0096.tynxb.2025-0878

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 1-10. DOI: 10.19912/j.0254-0096.tynxb.2025-0878

ENHANCEMENT STRATEGY FOR DISTRIBUTED PHOTOVOLTAIC HOSTING CAPACITY IN POWER DISTRIBUTION NETWORKS BASED ON SPATIOTEMPORAL FLEXIBILITY OF ENERGY STORAGE SYSTEMS AND MULTI-PORT SOFT OPEN POINTS

Diao Hanbin, Liu Kang, Li Peiqiang, Xiao Jiajie

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Abstract

To alleviate the limitation on distributed photovoltaic integration imposed by the inflexibility of the spatiotemporal distribution of new energy and load, this paper proposes a co-planning strategy for energy storage and intelligent soft-switching to enhance the capability of power distribution networks for distributed PV power. Firstly, to evaluate the collaborative benefits of multi-port soft open point （MSOP） and energy storage system （ESS） in spatiotemporal flexibility, an evaluation metric integrating branch current time-uniformity level and network loss sensitivity is proposed. Subsequently, a two-level stochastic optimization model comprising planning and operation is established based on this collaborative benefit metric. By embedding the MSOP-ES model, this framework is capable of considering diverse integration forms of MSOP and ESS. Finally, the two-level optimization model is efficiently solved using the Benders decomposition algorithm. Case studies on the IEEE 33-node distribution network and a real-world distribution network demonstrate that the proposed method effectively enhances PV hosting capacity while improving voltage stability and flexible transfer capability by planning ESS and MSOP integration.

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photovoltaic hosting capacity / energy storage / multi-port soft open point / temporal and spatial flexibility / siting and sizing

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Diao Hanbin, Liu Kang, Li Peiqiang, Xiao Jiajie. ENHANCEMENT STRATEGY FOR DISTRIBUTED PHOTOVOLTAIC HOSTING CAPACITY IN POWER DISTRIBUTION NETWORKS BASED ON SPATIOTEMPORAL FLEXIBILITY OF ENERGY STORAGE SYSTEMS AND MULTI-PORT SOFT OPEN POINTS[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 1-10 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0878

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