Gas turbine generation peak regulation system based on liquid air energy storage technique

Abstract

The invention discloses a gas turbine generation peak regulation system based on the liquid air energy storage technique, comprising a gas turbine generation subsystem, an air liquefaction-separationsubsystem, a liquid air energy release subsystem and a cold storage unit subsystem. During trough period, surplus electricity generated by the gas turbine generation subsystem is converted into low-temperature cold energy stored in liquid nitrogen and oxygen; during peak period, liquid nitrogen cold energy in the air liquefaction-separation subsystem is converted into electricity, liquid oxygen that absorbs heat and vaporizes is supplied to a combustion chamber for rich-oxygen combustion, and intake temperature is decreased; a cold storage unit stores inside cold energy, released by the liquidair in the liquid air energy release subsystem during gasification by preheating, during peak period, and applies the stored cold energy to precooling in the air liquefaction-separation subsystem before air liquefaction during trough period. The gas turbine generation peak regulation system based on liquid air energy storage technique can recycle waste heat from gas turbine exhaust, decrease intake temperature and provide a rich-oxygen combustion environment, thereby improving efficiency; after grid connection, the system allows peak load shifting and has high energy-storing efficiency.

Description

technical field [0001] The invention relates to the field of large-scale power storage and management in the gas turbine power generation industry, in particular to a gas turbine power generation peak-shaving system based on liquid air energy storage technology. Background technique [0002] Gas turbine is a new generation of power plant after steam turbine and internal combustion engine. It represents the overall level of major equipment manufacturing industry and is of great significance to national defense, improvement of energy structure and sustainable development of environment. Gas turbines have the advantages of high power density, fast start-up speed, and light weight, and are widely used in many fields such as ship power, distributed energy, and power generation. However, in recent years, with the increasingly prominent issues of energy security and environmental pollution, higher requirements have been put forward for the application of gas turbines in the field o...

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Problems solved by technology

[0006] Purpose of the invention: The purpose of the invention is to provide a gas turbine power generation peak-shaving system based on liquid air energy storage technology to solve technical problems such as gas turbine high-temperature exhaust waste heat waste, high intake temperature, and unstable power generation and transmission after grid connection

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