System for realizing thermo-electric decoupling and rapid peak regulation by utilizing bypass

Abstract

The embodiment of the invention discloses a system for realizing thermo-electric decoupling and rapid peak regulation by utilizing a bypass. The system is characterized in that high-pressure bypass steam in the system drives a peak regulation generator to generate electricity through a backpressure steam turbine firstly, the quantity of electricity sent by the peak-regulation generator can be supplied to an electric boiler, and the electric boiler converts electric energy into heat energy of a heat exchange medium and then transmits the heat energy to heat-supply network circulating water, meanwhile, exhaust steam of the backpressure steam turbine can be used to heat the heat-supply network circulating water, so that the gradient utilization of the energy is realized, and compared with a high-pressure bypass temperature and pressure reduction heat supply scheme, the energy utilization rate is relatively high; during electricity utilization valley of a power grid, the exhaust steam of the backpressure steam turbine and the electric boiler are used to heat the heat-supply network circulating water, so that the heat supply capacity of an unit is greatly improved, thermo-electric decoupling is realized, during the electricity utilization peak of the power grid, the output of the backpressure steam turbine is reduced, the climbing capacity and the load response speed of the unit areimproved, and the flexibility of power grid dispatching is improved.

Description

technical field [0001] The present application relates to the technical field of thermal power units, in particular to a system for realizing thermoelectric decoupling and fast peak regulation by using a bypass. Background technique [0002] In recent years, with the rapid development of the use of renewable energy such as wind power and photovoltaics, the problem of abandoning wind and solar in some areas of my country has become increasingly prominent. Therefore, improving the deep peak-shaving capability of thermal power units is one of the most direct and effective measures to solve the problem of wind power and other renewable energy consumption. Relevant regulations mention that in the four years from 2016 to 2020, 220 million kilowatts need to be flexibly transformed, including 133 million kilowatts of thermal power units (three north regions), and 87 million kilowatts of pure condensing units. Increase the peak shaving capacity by 46 million kilowatts, including 45 ...

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Problems solved by technology

[0005] The purpose of the embodiment of this application is to provide a system that uses bypass to realize thermoelectric decoupling and fast peak regulation, which solves the problem of power grid peak regulation capability

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