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System for improving power flexibility and method thereof

A flexible and electric power technology, which is applied in the system field of improving power flexibility, can solve problems such as limited peak shaving capacity, reduced energy quality, and high safety risks, so as to increase service life, improve energy consumption capacity, and high power storage efficiency Effect

Pending Publication Date: 2020-06-12
XIAN XIRE ENERGY SAVING TECH +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] At present, the technologies to improve the peak-shaving capability of coal-fired units mainly include electric boiler heat storage technology, water tank heat storage technology, steam turbine steam process transformation technology, electrochemical battery energy storage technology, etc. Electric boiler heat storage technology is to convert electric energy into heat energy. It is used for heating and has strong peak-shaving ability, but the energy quality is greatly reduced, and it is only suitable for cogeneration units. Water tank heat storage technology and steam turbine steam process transformation technology have better thermal economy and relatively low investment, but the peak-shaving ability is limited. , and is only applicable to combined heat and power units. Electrochemical battery energy storage technology has fast response, small size, and short construction period, but has short life, high average cost, and high safety risk. Whether it is suitable for large-scale energy storage implementation still needs engineering demonstration verification

Method used

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  • System for improving power flexibility and method thereof

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0024] Such as figure 1 As shown, this embodiment is a system for improving power flexibility, which consists of a primary compressor 1, a primary cooler 2, a secondary compressor 3, a secondary cooler 4, a gas-liquid conversion device 5, and a liquid air storage tank 6. Primary heater 7, primary expander 8, secondary heater 9, secondary expander 10, heat storage system cold tank 11, heat storage system hot tank 12, first valve 13, second valve 14, The generator set 15 and the flexibility control device 16 are composed.

[0025] The outlet of the primary compressor 1 is connected to the inlet of the high temperature side of the primary cooler 2, the outlet of the high temperature side of the pri...

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Abstract

The invention discloses a system for improving power flexibility and a method thereof. The system is composed of a multi-stage compressor, a multi-stage cooler, a gas-liquid conversion device, a liquid air storage tank, a multi-stage heater, a multi-stage expander, a heat storage system, a generator set, a flexibility control device and a control valve; and the operation method of the system comprises an energy storage mode and an energy release mode. When the system and the method thereof are applied to a coal-fired power plant, the peak regulation capacity and the response speed of the unitcan be improved, the frequency modulation performance of the unit is improved, the stability of electric output power can be improved when the system and the method thereof are applied to a photovoltaic power plant and a wind power plant, and the new energy consumption capacity of a power grid is improved.

Description

technical field [0001] The invention belongs to the technical field of energy storage and peak regulation, and specifically relates to a system and method for improving power flexibility. It is suitable for power plants with flexibility requirements such as coal-fired units, and also for power plants that require stable output such as photovoltaics and wind power. Improve the power quality of the power plant and improve the stability of the power system. Background technique [0002] At present, my country's wind energy, solar energy and other renewable energy sources are developing rapidly year by year. In addition, the electricity consumption of the whole society is increasing year by year, and the peak-to-valley difference in power consumption of the power grid is increasing. [0003] At present, the technologies to improve the peak-shaving capability of coal-fired units mainly include electric boiler heat storage technology, water tank heat storage technology, steam turb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K11/00F01K7/02F01K3/18F01K13/00F04B41/02F04B41/06F04B39/06
CPCF01K11/00F01K7/02F01K3/18F01K13/00F04B41/02F04B41/06F04B39/06Y02E70/30Y02E60/16
Inventor 居文平黄嘉驷张建元常东锋马汀山范庆伟王伟高庆
Owner XIAN XIRE ENERGY SAVING TECH
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