Simulation Study Of Compressed Air Energy Storage Based On Wind Power Generation System

In recent years,with the increasing demand for energy in China,new energy sources with wind power as the main force have been vigorously developed.However,the intermittent and unstable characteristics of wind power generation have led to the inability to integrate large quantities into the grid despite the large installed capacity.This paper will provide a feasible technical solution for severe wind abandonment in some areas,which can achieve the effect of “peak-breaking valley filling” and balancing electric load.It provides a feasible technical path for the application of renewable energy to micro-energy grids,and has played a huge role in solving the energy crisis,the status of environmental pollution,and the development of the national economy.This paper first analyzes the real-time data of a wind farm in Baiyun Obo,and calculates the required energy storage capacity by calculating the wind speed density curve and the wind turbine operating power curve through matlab.A set of calculation methods is given to provide a theoretical method for the establishment of a wind-compressed air energy storage system.Then analyze the representative air compressors on the market and get conclusions.Under different wind conditions,use different types of air compressors,such as air compressors with power between150 KW and 350 KW,regardless of conversion efficiency and needs.The energy storage volume is better than other air compressors.This type is suitable for wind farms with relatively stable wind conditions.High-power air compressors,such as the BLT150A/W-750 W,have large energy consumption,resulting in smaller energy storage capacity,but their energy storage time is shorter,resulting in a faster overall response of the energy storage system.This type is used in wind farms where the wind conditions fluctuate rapidly and can quickly realize the energy storage and release process.The analysis of the above actual cases proves the necessity of coupling new energy and energy storage.Then use solidworks to design a 1:1experimental platform to complete the experimental principle design and physical structure design.The efficiency of conventional compressed air energy storage systems is calculated experimentally because traditional compressed air systems are inefficient.Therefore,it is optimized and designed to make full use of the heat ofcompression to connect the heat exchangers in series in the original system.Consider the relationship between the heat exchanger and the number of compression/expansion stages.The optimal relationship between the number of compression stages and the number of expansion stages and the optimum ratio of the number of stages to the efficiency of the heat exchanger are obtained.When the number of compression/expansion stages is 2,3 and 4,the efficiency of the matched heat exchanger is between 0.9 and 0.85,and the efficiency can reach 68%-71.8%.When the number of compression/expansion stages is 5,6,and 7,the efficiency of the matched heat exchanger is between 0.85 and 0.75,and the efficiency can reach 68.1%-68.9%.When the number of compression/expansion stages is 8 and 9,the efficiency of the matched heat exchanger is between 0.8 and 0.75,and the efficiency can reach 68.%-68.2%.