Solar photo-thermal power generation system and energy storage method

Abstract

The invention discloses a solar photo-thermal power generation system and an energy storage method. Liquid metal battery bodies are combined and stringed and then are placed in a heat storage working medium storage tank body of a heat storage system, the high-temperature liquid metal battery bodies capable of sensing head and storing heat are used as heat storage working media and are placed in a high-temperature storage tank, a grid connection current transformer and a heat exchange device are added on liquid metal batteries, the liquid metal battery bodies and a traditional heat storage system jointly form the power generation system capable of storing the electric energy and the heat energy at the same time, battery independent mounting cost and the heat storage working medium cost are saved, and more heat storage volume can be added. The heat storage system can provide the necessary high-temperature working environment for the liquid metal batteries, when the supply of the electric energy of a power grid is greater than the demand, the liquid metal batteries are charged, the liquid metal batteries can be used as heating elements for converting redundant electric energy of the power grid into heat energy to be stored, and the imbalance between supply and demand of the power grid is adjusted. According to the solar photo-thermal power generation system and the energy storage method, the heat energy and the electric energy are stored at the same time, the operation mode flexibility of the power generation system is greatly improved, more operating modes are created, and the power grid and power supply demands are met.

Description

[0001] technical field [0002] The invention relates to a solar thermal power generation system and an energy storage method. Background technique [0003] The heat storage system in the existing solar thermal power generation system is usually configured with two storage tanks for storing high-temperature working fluid and low-temperature working fluid respectively. The heat energy stored in the heat storage system comes from the solar concentrating device, and the low-temperature working medium is heated and enters the high-temperature storage tank for use; when the solar energy is insufficient or missing, the high-temperature working medium can continue to provide high-temperature steam for the steam turbine for power generation; After the exchange, the temperature of the heat storage working medium decreases and enters the cryogenic tank to be reheated. This kind of energy storage system mainly focuses on heat storage, and its heat storage medium can only store heat en...

AI Technical Summary

Problems solved by technology

This kind of energy storage system mainly focuses on heat storage, and its heat storage medium can only store heat energy, but not electric energy. The working mode is limited to the daytime energy storage-night energy discharge mode, and the energy can only be fed into the grid in the form of electric energy, and cannot be bidirectional. flow

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