Thermal power plant combined heat and power generation and compressed air energy storage complementary integration system

Abstract

The invention discloses a thermal power plant combined heat and power generation and compressed air energy storage complementary integration system which comprises a thermal power plant combined heatand power generation system and an insulation compressed air energy storage system. The condition that heat load and power load supply and demand are not balanced in northern Chain can be solved, andmore reproducible electric energy is contained for internet surfing. Meanwhile, the problem that high-grade energy loss and compressor unit compression heat loss are caused since the heat supply and steam extracting parameters of a combined heat and power generation unit are too high is avoided, and cold and hot water tanks are omitted. The system is in a strong-heat weak-power state when the heatload is high and the power load is low, at the moment, a compressed air energy storage unit stores power and releases heat, and the combined heat and power generation unit and the compressed air energy storage unit can supply heat to heat consumers jointly; the system is in a strong-power weak-heat state when the power load is high and the heat load is low, and at the moment, the compressed air energy storage unit absorbs the heat from the combined heat and power generation unit and meanwhile releases heat; and at other moments, the combined heat and power generation unit works independently,and the heat and power supply capacity can be adjusted with a small range.

Description

technical field [0001] The invention belongs to the technical field of energy storage and energy saving, and relates to a compressed air energy storage system, in particular to a complementary integrated system of thermal power cogeneration and compressed air energy storage in a thermal power plant. The heat of steam and the waste heat of boiler exhaust smoke realize the efficient storage and utilization of electric energy and thermal energy. Background technique [0002] Compressed air energy storage can realize large-capacity and long-term electric energy storage, and adiabatic compressed air energy storage is an advanced energy storage system that does not depend on fuel. During operation, a large amount of heat of compression will be generated. Due to the limitation of the heat transfer temperature difference of the heat exchanger, this part of the heat of compression cannot be completely transferred to the compressed air in the energy release process, so the temperature...

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Problems solved by technology

[0005] In view of the lack of thermoelectric decoupling capability of existing thermal power cogeneration units and the optimization of the cold and hot water tank system of the adiabatic compressed air energy storage system, at the same time, the excessive wind power, photovoltaic and other renewable energy sources in the three north regions of my country have nowhere to be consumed To solve the problem of storage, the present invention provides a thermal power cogeneration and compressed air energy storage complementary integrated system, which couples the thermal power cogeneration system and the adiabatic compressed air energy storage system, so that the thermal power unit can complete thermoelectric decoupling, and the The excess electric energy is stored in the adiabatic compressed air energy storage system, and at the same time, it can get rid of the limitation of the hot and cold water tanks of the adiabatic compressed air energy storage system through the coupling of heat flow, reducing system investment and land occupation

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