Energy Storage Capacity Optimization For Micro Grid Including Electricity And Heat

Distributed energy generation is the inevitable direction of future power generation technology,it can effectively alleviate the human society is facing energy and environmental problems.Micro-grid is to promote the development of distributed energy generation technology,an important carrier,micro-grid users on the power requirements are economic,safe and stable.Because of the randomness of renewable energy generation and load,energy storage device plays an important role in ensuring the safe and steady operation of micro-grid.This paper studies the different micro-sources in the micro-grid,analyzes its technical characteristics and output characteristics,and builds the corresponding economic model based on the power output.For a combined heat and power microgrid,Heat tank is modeled similar to battery and allocation model of heat and electricity storage based on economic dispatch is established.Multi-scenario theory is adopted to consider randomness and artificial bee colony is applied to optimize the operation of micro-grid with different storage capacity.Finally,composite cost of micro-grid with different storage capacity is compared to determine the best capacity.A case study based on Matlab simulation is conducted to verify that method and model presented can effectively reduce the cost of micro-grid and improve the economy and stability of power supply in micro-grid.