Comprehensive energy peak regulation station constructed based on phase change energy storage and peak regulation method

Abstract

The invention relates to a comprehensive energy peak regulation station constructed based on phase change energy storage and a peak regulation method, the peak regulation station uses valley electricity redundant energy of a wind power plant and / or a photovoltaic power station and / or a power grid of a green electricity base to supply power to a fused salt electric heating furnace, and the fused salt electric heating furnace heats solid fused salt into liquid fused salt; liquid fused salt sequentially flows through the superheater, the evaporator and the preheater, the liquid fused salt and normal-temperature water complete primary heat exchange in the preheater to generate high-temperature water, the liquid fused salt and the high-temperature water complete secondary heat exchange in the evaporator to generate steam, the steam is heated and pressurized by the superheater to generate high-temperature and high-pressure steam, and the steam turbine is driven to rotate. The steam turbine pushes the generator to generate electric energy to supply power to users, part of high-temperature and high-pressure steam is conveyed to the steam pipe network to supply steam to the users, the high-temperature and high-pressure steam passing through the steam turbine enters the waste heat recovery device to exchange heat with normal-temperature water to generate high-temperature water, part of the high-temperature water supplies heat to the users, and the other part of the high-temperature water enters the absorption refrigeration equipment to generate cold energy to supply cold to the users.

Description

Technical field: [0001] The invention relates to the technical field of energy storage and utilization and power grid peak regulation, in particular to a comprehensive energy peak regulation station and a peak regulation method based on phase change energy storage. Background technique: [0002] In the face of severe challenges brought to mankind by climate change, resource shortage, and environmental pollution, the traditional extensive and uncoordinated energy supply mode dominated by coal is unsustainable. Reconstruction of clean, low-carbon, safe and efficient energy based on scenery The supply system is the only way for the development of our country and the world. Driven by the dual-carbon goals that embody the mission of a major country, it is bound to shape new technologies, new formats, new industries, and new models for the green co-supply of electricity-heat-cold-steam multi-state energy, which will lead to the birth of a high-proportion power electronic device A...

AI Technical Summary

Problems solved by technology

[0003] 1. The ecological impact of traditional thermal power technology is serious

The traditional electricity-heat-cold-gas co-supply technology based on coal consumes a lot of non-renewable primary energy, has a high proportion of carbon sulfide emissions, and has a serious ecological impact

[0004] 2. Power grid peak regulation capacity is weak

Insufficient responsiveness and poor flexibility of traditional thermal power units have resulted in limited peak-shaving capacity of the power grid still dominated by thermal power units; random fluctuations in output and wind-solar grid-connected ratios are increasing year by year, which intensifies the peak-shaving pressure of the power grid; the proportion of power electronic equipment in the power grid is increasing The higher it is, the more it tends to power electronics, the equivalent inertia is greatly reduced, and the peak-shaving capability 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. Thermal power plants shutting down on demand are a serious waste of resources

However, although the infrastructure, service facilities and related equipment contained in thermal power plants that have been shut down in accordance with the ecological needs of green mountains and green waters have not reached the decommissioning status, they are forced to be idle or dismantled due to technical barriers, resulting in huge application value. A lot of waste of high-quality resources

[0007] 5. The existing large-scale energy storage peak-shaving technology still needs to be improved and optimized

For example, the invention patent with the notification number CN103352746B discloses a "natural gas cooling, heating and electric energy supply device based on molten salt heat storage". Natural gas is used as a primary energy source, which has carbon emissions and cannot fully solve the problem of green and clean energy consumption

The invention patent with the publication number CN109659958A discloses "a power system and its peak regulation and frequency regulation method". Responsiveness, which belongs to the transformation of thermal power units, whose primary energy source is coal power, which has not yet achieved clean energy

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