Shared energy storage is an effective measure to improve the efficiency of energy storage and play the synergistic advantages of micro-energy grid clusters,however,most of the existing studies have simplified the energy transmission channel between shared energy storage and micro-energy network clusters into a bus structure,which has problems such as'fixed capacity'but not'siting',insufficient utilisation of shared energy storage after configuration,and so on.There are problems such as only'capacity-setting'but not'siting'and insufficient utilisation of shared energy storage after configuration.In this context,a two-layer optimal configuration model of shared energy storage for micro-energy grid clusters is established,taking into account the carrying capacity of the power grid.Firstly,a two-layer configuration model of shared energy storage for micro-energy grid clusters is established:the upper model takes the minimisation of the operating cost of the power grid and the shared energy storage planning as the goal,and optimises the decision-making of the location and capacity of the shared energy storage by taking into account the carrying capacity of the power grid;the lower model takes the minimisation of the operating cost of the micro-energy grid as the goal,and optimises the solution to the micro-energy grid operation problem.Secondly,the lower-layer model is converted into the constraints of the upper-layer model based on the KKT condition,and the two-layer optimal allocation model is converted into a single-layer optimisation problem.Finally,a comparative analysis is conducted using a test case containing three micro-energy grids.The results show that the proposed model can fully consider the carrying capacity of the grid and obtain a shared energy storage siting and capacity-setting scheme with better economic benefits and shorter payback period.
关键词
微能源网/共享储能/电网承载能力/双层优化配置/集群
Key words
micro energy grids/shared energy storage/grid carrying capacity/bi-layer optimal allocation/cluster
维普
万方数据