Hydrogen energy storage solar coal-fired coupling type flexible power generation system and operation method

Abstract

The invention discloses a hydrogen energy storage solar coal-fired coupling type flexible power generation system and an operation method. The system comprises a coal-fired power generation system anda hydrogen energy storage system, wherein the coal-fired power generation system is coupled with solar thermal power generation through a solar heat collection device, a heat storage medium, a watersupply heat exchanger, a primary water supply regulating valve and a secondary water supply regulating valve; the hydrogen energy storage system comprises a rectifier switch, an electrolytic hydrogenproduction tank, an oxygen storage tank, a hydrogen-oxygen fuel cell, an inverter switch and the like; the water supply flow of heat exchange of the heat storage medium flowing through the solar heatstorage device is regulated through the primary water supply regulating valve and the secondary water supply regulating valve, so that the solar energy is utilized to the maximum extent and the coal consumption is reduced; operation of the electrolytic hydrogen production tank and the hydrogen-oxygen fuel cell is controlled through calculating the power generation power change caused by solar irradiation; the system power generation power fluctuation caused by the solar irradiation change is quickly counteracted; the power transmitted to a power grid is stable; the problem of light abandoningis solved; the quick load change and wide load operation capability of a unit can be greatly improved; and the hydrogen energy storage solar coal-fired coupling flexible power generation system is small in structural transformation degree of an original coal-fired power generator set, small in investment and good in economy.

Description

technical field [0001] The invention relates to the technical field of multi-energy complementary power generation, in particular to a hydrogen storage solar coal-fired coupling flexible power generation system and an operation method. Background technique [0002] In recent years, under the requirements of low-carbon and environmentally friendly development, the Chinese government has accelerated the construction of multi-energy complementary demonstration projects. As a clean and environmentally friendly renewable energy, solar energy is gradually increasing in my country's energy structure. However, due to the randomness and volatility of solar energy, large-scale power generation and grid integration have exacerbated grid fluctuations, leading to the demand for peak-shaving and frequency-regulating power grids. The increasing amount of renewable energy has caused difficulties in the consumption of renewable energy in some areas of my country; at present, coal-fired units ...

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Problems solved by technology

[0004] 1) Solar thermal power generation is limited by the weather, and it is difficult to meet the power supply demand of the grid in a stable and flexible manner. It is necessary to seek a more potential solution for coupling solar energy, coal combustion and energy storage to improve the stability and flexibility of the power supply of the generator set to the grid

[0005] 2) Due to the fluctuation of solar energy but the peak-shaving performance of coal-fired units is limited, it is necessary to seek a more reasonable control method to maximize the use of solar energy at all times

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