压缩空气蓄能调节太阳能系统输出功率建模与研究

Modeling and Research of Compressed Air Energy Storage for Adjusting Output Power of Solar Power System

太阳能的间歇性和波动性不利于太阳能发电大规模并网,实施电力储能可平抑输出功率波动,改善电能质量。目前,我国大规模的电力储能只有抽水蓄能,却受到水资源的限制而无法普遍开展。提出了基于压缩空气蓄能(compressed air energy storage,CAES)的太阳能发电站功率调节系统,给出了CAES调节系统额定功率、容量等系列关键参数的设计方案,并选取案例对CAES系统仿真模拟。结合电站所在地区负荷变化及与局域电网电能交换数据,对比了采用CAES功率调节系统前后太阳能发电并网对局域电网的影响,分析结果表明CAES调节太阳能发电能有效地缓解对局域电网的冲击。

The intermittence and volatility of solar energy pose serious challenges to grid interconnection of the solar power station,and power energy storage can smooth solar power output fluctuation and improve power quality. Currently,the pumped hydro-storage(PHS) is the only large-scale energy storage technology in China. However,PHS cannot widely be implemented because of shortage in water resources. The paper proposes a solar power conditioner system based on compressed air energy storage(CAES)and gives the design scheme for the rated power, storage capacity and other key parameters of CAES. Simulation for CAES is conducted with selected cases of the specific data. Moreover,the paper analyzes the effects on grid supply based on the local load characteristics and the power quantity exchanged between the local electricity users and the grid. The analysis shows that using CAES to adjust solar power can effectively reduce the electric shock to the grid brought by the solar power station.