Research On Cluster Coordination Scheduling Method For Multi-microgrid

With the popularization of distributed generation technology,microgrid technology,which integrates distributed resources to better realize the rational allocation of renewable energy and improve the quality and security of power supply through flexible control technology.Therefore,the microgrid technology has gradually become the focus of integrated utilization of renewable energy technologies.With the development of micro-grid technology,a large number of microgrids are connected to the traditional power system,which greatly increases the complexity of power network structure,management mode,coordination strategy and information exchange.This paper is mainly as follows:1.This paper analyzes the mechanism of wind-solar power generation and sets up the microgrid mathematical model of wind-solar storage.On the basis of microgrid technology,this paper introduces a concept of "Micro-Grid Cluster"(MGC)with open autonomy of multi-microgrid.The cluster connection mode of multi-microgrid is selected and the classification threshold of micro-grid is optimized by SVD optimization method affected by multi-state parameters of power grid.Meanwhile,the multi-micronetworks are classified by varying thresholds in different time periods,and the micronetworks with the same classification results are managed by clusters,thus realizing different types of functions.Based on the simulation analysis of 10 microgrids,the results show that the classification of microgrids obtained by this optimization method meets the demand of power network in different time period.2.By adopting multi-agent technology based hierarchical coordination mechanism for the whole cluster and distribution network,the scheduling decision making process is divided into cluster layer economic management process,renewable energy consumption rate optimal management process and distribution network layer coordination scheduling process.Then,the corresponding mathematical models are established,the comprehensive objective function and its related constraints are proposed,and the solving process of the model is given by particle swarm optimization algorithm.3.For the bilevel coordination scheduling model,a simulation model based on 10 microgrids is established.This paper analyzes the overall interactive power,economic benefits and renewable energy efficiency of each cluster Agent and cluster layer.The proposed multi-micro grid cluster dual-layer coordination scheduling model can meet the scheduling policy requirements of each time period of the power grid,which is better than the simulation results after the optimization of other multi-micro grid and grid-connected coordination scheduling methods on the overall benefits of the cluster and the consumption of renewable energy.