High-capacity compressed air energy storage and high-efficiency power generation system

Abstract

The invention belongs to the field of high-capacity industrial energy storage, and particularly relates to a high-capacity compressed air energy storage efficient power generating system. A power generating electromotor is respectively connected with a plurality of air compressors as well as a high-pressure turbine and a low-medium-pressure turbine coaxially through clutches; intercoolers are connected among the air compressors; the last air compressor is connected with a cooler; an air pipeline of the cooler is connected with an air storage chamber; the intercoolers and a hot flow pipeline of the cooler are connected with the hot flow side of a heat storage device; the air storage chamber is respectively connected with the inlets of the air sides of the heat storage device and a heat regenerator; the air sides of the heat storage device and the heat regenerator are sequentially connected with a combustor and the high-pressure turbine; a regenerator is connected between the high-pressure turbine and the low-medium-pressure turbine; the outlet of the low-medium-pressure turbine is connected with the smoke side of the heat regenerator. The system can absorb unstable power load generated by renewable energy sources on a large scale, also can absorb the residual electric power when the power grid load is at a low ebb, and releases the stored energy at the electricity consumption peak so as to meet the requirement of the power grid pitch peak.

Description

technical field [0001] The invention belongs to the field of large-capacity industrial energy storage, in particular to a large-capacity compressed air energy storage and high-efficiency power generation system for energy cascade utilization. Background technique [0002] With the continuous growth of my country's economy, China's energy industry has developed rapidly, and has initially formed an energy supply pattern with coal as the main body, electricity as the center, and oil, natural gas and renewable energy in an all-round way. It is expected that my country's energy demand will maintain a strong growth trend for a long time in the future. Although my country's electric power industry has made considerable progress, there are still many problems: the peak-to-valley difference in power grid load increases year by year, and the peak-shaving capacity is insufficient; the total power demand is large, the energy structure is unreasonable, and the proportion of clean energy ...

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Problems solved by technology

Although my country's electric power industry has made considerable progress, there are still many problems: the peak-to-valley difference in power grid load increases year by year, and the peak-shaving capacity is insufficient; the total power demand is large, the energy structure is unreasonable, and the proportion of clean energy power generation is not high; because There are various obstacles, and the power generation of many renewable energy power plants cannot be connected to the grid, resulting in the emergence of large-scale "abandoned wind" and "abandoned solar energy", resulting in a great waste of renewable energy and renewable energy investment; The proportion of power generation capacity of power plants is small; large-capacity thermal power units participate in grid peak regulation, which is neither economical nor environmentally friendly, and has potential safety hazards; large-capacity nuclear power has poor peak regulation capabilities, and the development of nuclear power will bring greater pressure to grid peak regulation

At present, there is no practical compressed air energy storage power station in China. Some of the patented technologies proposed either have a small capacity and cannot undertake the task of power grid peak regulation; or the power generation load of the system is poorly adjustable; Full recycling, low efficiency of the system

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