Pumped storage power generation system and method based on steam and air pressurization

Abstract

The invention discloses a pumped storage power generation system and method based on steam and air pressurization and belongs to the technical field of storage power generation. According to the pumped storage power generation system and method based on steam and air pressurization, pressurizing energy storage is achieved by means of electric energy generated through valley electricity of a power grid or the second-half night wind of a wind power plant, industrial waste heat and solar energy, and working medium water is driven to flow by a pressure head formed by a gas mixture formed by steam and compressed air, so that a water-turbine generator set is driven to act to achieve power generation. Compared with an existing system, the pumped storage power generation system and method based on steam and air pressurization have the advantages that the requirements for engineering geological conditions are low, the operating mode is flexible, energy storage power consumption is low, storage power generation efficiency is high, energy storage density is high, and comprehensive and gradient utilization of various energy resources on different grades is achieved.

Description

Technical field [0001] The invention relates to a pumped-storage power generation system and method, in particular to a pumped-storage power generation technology using air and steam mixed gas pressurization, belonging to the technical field of energy storage power generation. Background technique [0002] The instability and intermittentness of renewable energy power generation and the increasing peak-to-valley difference of the power grid have become major problems affecting the safety and economic operation of the power grid. The development of power storage technology is an effective way to solve the above problems. [0003] So far, the only power storage technologies that can achieve large-scale commercial applications (such as 100MW or more) are pumped water storage power generation technology and compressed air storage power generation technology. However, these two power storage technologies are limited by geological conditions to varying degrees. Widely promote and apply o...

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Problems solved by technology

[0003] So far, the only electric energy storage technologies that can achieve large-scale (for example, more than 100MW) commercial applications are pumped storage power generation technology and compressed air energy storage power generation technology. However, these two electric energy storage technologies are limited by geological conditions to varying degrees and cannot Widespread application on a large scale

Moreover, the energy storage efficiency of the above two power storage systems is not high, resulting in a large amount of waste of electric energy (according to relevant literature reports, the energy storage power generation efficiency of the compressed air energy storage power generation system can only be close to 70% at the highest, and the conventional pumped storage power generation The energy storage power generation efficiency of the system is about 77%)

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