Shared energy storage planning and multi-microgrid flexibility optimization strategy based on source-load uncertainty
Wang Honglei
Nie Xun
Hu Yujie
Li Chengjiang
Abstract：With a large number of renewable energy access to the power grid and the growth of power load demand,the reliability of power system operation is reduced.The shared energy storage system can curb the uncertainty of both supply and demand sides of the microgrid,which has attracted extensive research attention.A bi-level model of"source-load-storage"collaborative scheduling is proposed to solve the problem of mismatch between power supply and demand and promote the economic operation of power grid.The upper model solves the optimal configuration of the shared energy storage system,while the lower model solves the minimum operating cost of the multi-microgrid system.In order to promote the power interaction between microgrids and between microgrids and shared energy storage system,a profit distribution scheme based on interactive contribution is used.Five experimental schemes are designed according to the situation of electricity market.The experimental results show that the capacity configuration of shared energy storage in scheme 3 is reduced by 62.4％compared with that of independent energy storage in scheme 2,and the operating cost of MMG is reduced by 46.8％.After further considering the demand response in the scheme 5,the equivalent virtual energy storage capacity is increased,which makes the capacity configuration of the shared energy storage under this scheme reduced by 31.8％compared with the scheme 3,and the MMG operating cost is reduced by 40.2％.
Keywords："source-load"uncertaintymulti-microgrid systemshared energy storagebi-level optimization modelflexibility optimization strategy
Publication Date：2024-01-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：15( 107-121 )