Economic operation strategy for distribution network with multiple microgrids

The random fluctuation caused by the high percentage of new energy makes the operation of the distribution network face severe challenges. With the purpose of improving the economy of the distribution net, this paper puts forward an economic operation strategy based on two-layer optimal dispatching with multi-microgrids lease shared energy storage. Firstly, the architecture of distribution network partitioning system with multi-microgrid shared energy accumulation is introduced, and establishes the shared energy accumulation power interaction model. Secondly, for the given shared energy storage capacity, a quantitative apportion model of the initial capacity of shared energy reservation is established from the perspective of wind and solar absorption of microgrid. With that, a two-layer optimization model for distribution network with multi-microgrid lease shared energy accumulation is recommended, in which the upper goal is to optimize the load flow of the distribution network, and the lower target is to cut down the operating cost of multi-microgrid and abandon wind and discard light. The results show that the strategy of numerous microgrids leasing shared energy reservation for the economy of distribution network, can achieve the co-ordination of supply and demand of source and load.