Optimal Configuaration Of Micro-grid Scenery Storage Capacity

Due to the continuous progress of microgrid technology,coupled with the extensive use of renewable energy,and the increase in the demand in terms of load,it is of great value to carry out research on microgrid.Because there are certain deficiencies in the utilization of solar energy and wind energy,such as strong randomness and intermittency,the micro grid has certain deficiencies in both power quality and system stability.The application of energy storage system can play the role of power suppression,reduce the peak-valley difference,and promote the stability of power supply of the grid to be better improved.Scientific optimal configuration of wind-landscape storage capacity can significantly improve the stability of the system and greatly reduce the corresponding system cost.Thus,the structure of the microgrid is optimized.The utilization rate of renewable energy is improved,and the stability of power supply is strengthened.In this paper,a typical wind-solar storage microgrid is constructed.The practical purpose is to promote the smooth operation and give consideration to the corresponding economy.The method of optimal allocation of wind-solar storage capacity is proposed.Firstly,this paper constructs the mathematical models of wind power generation,photovoltaic power generation,energy storage system,diesel generator,etc.Then a capacity optimal allocation model is proposed,and energy management strategy is set up to minimize the total cost.Considering that the installed capacity of each generation unit in the microgrid system is limited by actual engineering factors such as site occupation area,fluctuation of grid power,battery life and other constraints,the capacity of wind-field storage in the microgrid system under the two modes of grid-connected operation and off-grid island operation is optimized.Finally,by taking typical daily wind speed,light intensity,temperature and load curves of a region as the basic data,particle swarm optimization algorithm and genetic algorithm-particle swarm optimization algorithm were used to solve the microgrid optimization model for grid-connected operation and off-grid island operation respectively.A practical case is presented to verify the optimal configuration method,and the results are optimal and reasonable.