Thermal power generating unit fused salt step energy storage and discharge peak regulating system and method

Abstract

The invention relates to the technical field of fused salt energy storage, in particular to a thermal power generating unit fused salt step energy storage and discharge peak regulating system and method. The thermal power generating unit fused salt step energy storage and discharge peak regulating system comprises a thermal power generating unit and a fused salt step energy storage and discharge system. The thermal power generating unit comprises a boiler, a main turbine, a condenser, a condensate pump, a water feed pump, a regenerative system, a water feeding pump small turbine, an auxiliarysteam pipeline, a induced draft fan small turbine and an air and flue gas system. The fused salt step energy storage and discharge system comprises a high-temperature steam-fused salt heat exchanger set, a low-temperature steam-fused salt heat exchanger set, a high-temperature fused salt-steam heat exchanger set, a low-temperature fused salt-steam heat exchanger set, a high-temperature hot fused salt tank, a low-temperature hot fused salt tank and a cold fused salt tank. When the thermal power generating unit operates at low loads, the heat of redundant steam is stored to high-temperature andlow-temperature hot fused salt in a step manner, and the steam releasing heat is subjected to step utilization; and when the load need of the unit is high, the heat of the high-temperature and low-temperature hot fused salt is released to unit steam in a step manner is subjected to step utilization, the utilization rate of the equipment is increased, and the power generation efficiency, safe reliability and economical efficiency of the equipment are improved.

Description

technical field [0001] The invention relates to the technical field of molten salt energy storage, in particular to a thermal power unit molten salt cascade storage and discharge energy peak regulation system and method. Background technique [0002] The energy revolution aims to promote the sustainable development of energy, promote the development of new energy and the clean and efficient use of fossil energy. The rapid increase in the volume of new energy forces the load rate of traditional thermal power units to decrease. Most units operate at sub-full load for a long time, and a few even shut down, resulting in a waste of resources that have been put into production; The reduction of the overall load demand makes the load of the unit further reduced during the valley power period, which is close to the minimum steady load of the thermal power unit. These changes will lead to low utilization rate of thermal power units in production, low power generation efficiency, inc...

AI Technical Summary

Problems solved by technology

[0007] The invention solves the problem that the molten salt energy storage system in the related art is used in a single stage, resulting in a large energy loss, and proposes a thermal power unit molten salt cascade storage and discharge energy peak regulation system and method

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