Combined cycle heat supply and power peak regulation coupling system based on energy cascade utilization and operation method thereof

Abstract

The invention relates to a combined cycle heat supply and power peak regulation coupling system based on energy cascade utilization and an operation method thereof. The combined cycle heat supply andpower peak regulation coupling system comprises a gas turbine unit and a steam turbine unit; The gas turbine unit comprises a gas turbine compressor, a gas turbine combustion chamber, a gas turbine and a first generator; the steam turbine unit comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine low-pressure cylinder, a second generator, a condenser, a condensatewater pump, a shaft seal heater, a deaerator, a temperature and pressure reducing device, acting equipment, power equipment, a pressure matcher, a steam heat accumulator, a heat grid heater, a hydrophobic heat exchanger, a heat grid circulating pump, a water storage tank and a circulating water pump; according to the invention, different steam temperature and pressure reducing modes are utilized to provide required heat sources for external heating, an integrated design of a steam extraction system is carried out based on the principle of the energy cascade utilization, and a steam heat storage system is coupled, so that the thermoelectric decoupling operation capability of a 9E type combined cycle unit is improved when the external heating demand is met.

Description

technical field

[0001] The invention belongs to the technical field of improving the flexibility of thermal power units, and in particular relates to a combined cycle heating and power peak regulation coupling system based on energy cascade utilization and an operating method thereof. Background technique

[0002] At present, my country's policies are gradually emphasizing the promotion of new energy sources and reducing the proportion of thermal power units, which makes the development of thermal power units face severe challenges. At present, in order to improve the comprehensive energy utilization efficiency of thermal power units and strive for more utilization hours of power generation, deeply excavating the heating capacity of thermal power units has attracted more and more attention from all walks of life. Gas-fired cogeneration is a form of energy utilization that produces heat and electricity at the same time. It uses high-grade heat for power generation and low-gra...

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