Frequency Characteristic Analysis of Compressed Air Energy Storage Power Generation
At present,China's main power sources are coal,oil and natural gas,three widely used traditional energy sources.In the future,the amount of thermal power generation in China will keep declining for a long time,and it will be difficult to meet the demand of peak and frequency modulation.Therefore,energy storage is an effective means to solve the balance between power supply and demand.Compressed air energy storage is a kind of energy storage technology with large capacity.Under the background of compressed air energy storage technology,this paper studies a method of using liquid as driving medium and high pressure compressed air to generate electricity.The thermodynamic model of compressed air,the mathematical model of hydraulic motor and the mathematical model of synchronous generator are established in the system,and these models are simulated in Simulink.The influence of gas storage tank pressure and motor displacement on the motor speed in the system is analyzed,and the design of these parameters is selected.Aiming at the problem that the motor speed fluctuation is too large to be connected to the grid,the traditional PID method is adopted to reduce the motor speed fluctuation,stabilize the output of the system,and ensure the stable operation of the generator.
compressed air energy storagehydraulic drivevariable motorspeed control
万方数据
维普
