Solar thermal power generation system and energy storage method

Abstract

The invention discloses a solar thermal power generation system and an energy storage method. After the liquid metal battery body is assembled in series, it is placed in the heat storage medium storage tank of the heat storage system, and the high temperature liquid metal battery capable of sensible heat storage is placed As a heat storage working medium, the main body is placed in a high-temperature storage tank, and a grid-connected converter and a heat exchange device are added to the liquid metal battery, which together with the traditional heat storage system constitute an electric energy thermal energy storage and power generation system, which saves battery life. Separate installation cost and heat storage working medium cost can also increase more heat storage capacity. The heat storage system of the present invention can provide a necessary high-temperature working environment for the liquid metal battery; the power supply of the power grid is greater than the time needed to charge the liquid metal battery, and the liquid metal battery can be used as a heating element to convert the excess power of the power grid into heat energy and store it to adjust the contradiction between supply and demand of the power grid . The invention simultaneously stores heat energy and electric energy, greatly improves the flexibility of the operation mode of the power generation system, creates more operation modes, and satisfies the needs of the power grid and power supply.

Description

technical field [0001] The invention relates to a solar thermal power generation system and an energy storage method. Background technique [0002] 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 energy, but...

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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