Multi-energy combined supply type peak regulation station constructed based on hydrogen energy storage and peak shaving method

Abstract

The invention relates to a multi-energy combined supply type peak shaving station constructed based on hydrogen energy storage and a peak shaving method. The method comprises the steps: preparing hydrogen by using energy of a wind power plant and/or a photovoltaic power station of a green electricity base through a water electrolysis device, feeding the prepared hydrogen and oxygen into a gas engine, and converting the hydrogen and oxygen into heat energy through a combustion chemical reaction to form a high-temperature and high-pressure combustion product to push a turbine to do work; enabling the turbine to convert the generated airflow energy into mechanical energy to push the generator to operate to generate electric energy for power supply, enabling a part of steam generated by the gas engine to exchange heat with normal-temperature water through the heat exchange unit to generate high-temperature water for heat supply, enabling a part of the steam to be directly used for steam supply, and enabling another part of the steam to enter the absorption refrigeration equipment to generate low-temperature water for cold supply, wherein the prepared hydrogen can also be used for industrial hydrogen. According to the invention, the electric energy of the wind and light base is consumed to prepare hydrogen, the problem of environmental pollution caused by carbon and sulfur emission is reduced, and green and clean combined supply of electricity-heat-cold-steam-hydrogen multi-state energy is realized by utilizing the water electrolysis device, the gas engine and other related accessory equipment.

Description

Technical field: [0001] The invention relates to the technical fields of energy storage and utilization and power grid peak regulation, in particular to a multi-energy joint supply peak regulation station and a peak regulation method based on hydrogen energy storage. Background technique: [0002] In view of many problems such as serious environmental pollution, shortage of fossil energy resources, dependence on energy imports and many other problems caused by the traditional supply and demand of fossil energy such as coal power and petroleum as energy carriers, it has caused serious damage to my country's ecosystem, foreign exchange reserves and even national security. big threats and challenges. Considering the energy development strategies formulated at home and abroad to meet the development requirements of the new era, and based on the technical feasibility and maturity, vigorously develop renewable energy technologies such as scenery, form a clean installed capacity str...

AI Technical Summary

Problems solved by technology

[0003] 1. Traditional coal power technology consumes fossil resources and has serious ecological impact

The energy supply side method with coal as the main body has a high proportion of carbon emissions in the process of development, processing, and utilization, and excessive consumption of primary non-renewable energy such as coal seriously damages the environment and ecology and even threatens my country's energy security.

[0004] 2. The peak-shaving and frequency-regulating capabilities and rigidity of power grids that tend to be new and evolving are gradually weakening

Insufficient responsiveness and poor flexibility of traditional thermal power units have resulted in limited peak-shaving and frequency-regulating capabilities of power grids still dominated by thermal power units; the proportion of grid-connected wind and solar power grids with random fluctuations in output is increasing year by year, which intensifies the pressure on power grid peak regulation; the proportion of power electronic equipment in the grid It is getting higher and higher, gradually tending to power electronics, the equivalent inertia is greatly reduced, and the ability of peak regulation and frequency regulation is obviously insufficient

[0005] 3. Wind power abandonment phenomenon is serious

At present, the overall installed capacity of the power grid is excessive, and the source supply exceeds the load demand, forcing wind and wind to abandon power; areas with abundant wind and wind often have insufficient local consumption capacity, and the geographical location of the load concentration area does not overlap and couple, and the distance is far away. The actual transmission capacity depends on the delivery channel. capacity; the supply and demand of wind and load are staggered at peak times, forcing the power grid with limited peak shaving capacity to abandon wind and light

[0006] 4. The existing large-scale energy storage peak-shaving and frequency-regulating technology still needs to be improved and optimized

[0009] The existing thermal power plant peak regulation and frequency modulation system based on hydrogen energy storage mainly uses the electric energy output by the thermal power plant to prepare hydrogen for the electrolytic hydrogen production tank. This is exactly the case with the peak-shaving and frequency-regulating system. This structure is a relatively common form at present. Its disadvantage is that it uses non-clean renewable resources to prepare hydrogen, which has carbon emission pollution, and cannot solve the current problem of wind and wind power abandonment in the power grid; in addition, the current The current hydrogen storage peak-shaving system only involves hydrogen production and the structure of converting chemical energy into electrical energy after hydrogen combustion, and cannot realize the green and clean co-supply of multi-state energy.

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