Variable-working-condition multi-energy combined supply system and method suitable for different seasons

Abstract

The invention relates to the technical field of energy storage and distribution type energy, and discloses a variable-working-condition multi-energy combined supply system and method suitable for different seasons. The system comprises an energy storage subsystem, an energy releasing subsystem and a power grid, user side and control subsystem. The energy storage subsystem is used for storing of renewable energy source intermittent electric energy and comprises an air compression heat exchange unit and an air liquefaction energy storage unit, the energy releasing subsystem is used for combinedsupply of multiple energy and comprises an air rewarming gasification unit and a cold, heat and electricity energy supply unit, the cold, heat and electricity energy supply unit comprises an absorbingtype refrigeration part used for cold supply, a first low-temperature reheater, a second low-temperature reheater, a hot water supply device used for supplying heat and an expansion machine used forsupplying power, and the power grid, user side and control subsystem is used for energy supply and demand matching and regulation under the variable working condition. The variable-working-condition multi-energy combined supply system suitable for the different seasons has the advantage of meeting cold, heat and electricity needs of terminal user sides at different seasons.

Description

technical field [0001] The invention relates to the technical field of energy storage and distributed energy, in particular to a multi-energy joint supply system and method adaptable to different working conditions in different seasons. Background technique [0002] With the continuous optimization and transformation of the energy structure, the rational development of renewable energy is becoming more and more important, but its inherent intermittent and randomness limit the rapid development of renewable energy to a certain extent. As a technology to achieve intermittent energy translation, energy storage can enhance the controllability of renewable energy and promote the absorption of renewable energy in energy utilization systems. Among them, liquid air energy storage is a relatively mature, clean and environmentally friendly energy storage technology with high energy storage density and no geographical restrictions, which can be used on a large scale. It uses electricit...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-energy cogeneration system and method adaptable to different seasons, so as to solve the problem that the existing technology cannot realize the different demand for cooling, heating and power in different seasons, and convert the low-peak power of the power grid into peak power. Technical issues of electricity, cold, heat and adjustable ratio of cold and heat to electricity

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