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All-renewable-energy continuous and stable power generation method

A renewable energy and stable technology, applied in the field of renewable energy and multi-energy complementation, can solve the problems of resource uncertainty, lack of power grid guarantee, and inability to completely replace the guarantee power of fossil fuel power plants, and achieve stable processing. Effect

Pending Publication Date: 2021-08-06
NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the main type of power generation is fossil fuel power generation. The power generation process needs to emit a large amount of carbon dioxide. Renewable energy is represented by photovoltaic power generation and wind power generation. The installed capacity continues to expand, but due to the uncertainty of resources, it is not suitable for power grid protection. Therefore, at this stage, fossil fuel power plants are still the main force to ensure power supply. With the increase in the demand for installed capacity of the power grid system, the carbon emissions of the power system are on the rise, and single renewable energy systems such as photovoltaics and wind power have never been able to Replacing thermal power as a guaranteed and stable power source
[0003] Photothermal power station is a renewable energy power generation system with heat storage system and long-term power generation capacity. It has a certain ability to replace fossil fuel power stations. However, due to the influence of solar energy resources, the annual utilization hours of conventional photothermal power stations are about 4000h , unable to meet the reliability requirements of the power grid system, and still unable to completely replace fossil fuel power plants as a guaranteed power source for the power grid

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0046] Attached below figure 2 Embodiments of the present invention are further described in detail with examples.

[0047] Such as Figures 1 to 2 As shown, a method for continuous and stable power generation of all renewable energy sources of the present invention includes:

[0048] Photothermal power generation system 1, electric heating recovery system 2, photovoltaic power generation system 3, battery energy storage system 5, including concentrating heat collection system 7, heat storage system 8 and power generation unit 9.

[0049] The system operation mode is as follows:

[0050] Photovoltaic and solar thermal resources are in good condition during period A, and photovoltaic resources are not good during period B: solar thermal and photovoltaic resources operate independently to generate electricity, and solar thermal itself stores heat to generate power during period B.

[0051] In period C, the photovoltaic resources are in good condition and the solar thermal re...

Embodiment 2

[0057] Attached below image 3 Embodiments of the present invention are further described in detail with examples.

[0058] Such as image 3 As shown, a method for continuous and stable power generation of all renewable energy sources of the present invention includes:

[0059] Photothermal power generation system 1, electric heating recovery system 2, photovoltaic power generation system 3, wind power generation system 4, including concentrating heat collection system 7, heat storage system 8 and power generation unit 9.

[0060] With a solar thermal installed capacity of 50MW, a photovoltaic installed capacity of 200MW, a wind power installed capacity of 200MW, an electric heating recovery system with a capacity of 200MW, and a heat storage duration of 22 hours, the annual power generation hours of the system are 8714 hours, and the maximum continuous power outage time is 8 hours. Power outage, the power outage duration is 6h, 8h, 4h, 1h, 2h, 8h, 4h, 2h, 5h, 3h, 1h and 2h,...

Embodiment 3

[0062] On the basis of the above-mentioned embodiment 2, a 4h electric energy storage system is further added. With a solar thermal installed capacity of 50MW, a photovoltaic installed capacity of 200MW, a wind power installed capacity of 200MW, an electric heating recovery system with a capacity of 200MW, and a heat storage duration of 26h, it can realize a year-round 0h non-failure shutdown, continuous and stable guarantee output within 50MW according to the dispatch curve, providing a solution for a sustainable and stable power generation system with all renewable energy.

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Abstract

The invention belongs to the field of renewable energy and multi-energy complementation, and particularly relates to an all-renewable energy continuous and stable power generation method. The method adopts all-renewable energy as a constituent part of a power generation system, and the installation of a photo-thermal power station is designed according to the requirement of a power grid on the lowest guarantee installed capacity of the power station. Under the condition that resource conditions are good and power grid requirements are met, power can be independently generated, energy is stored in a photo-thermal heat storage system in advance through an electric heating recovery system when the resource conditions are not good, and under the condition that the resource conditions are not good, heat stored by a heat storage system can be utilized to generate power, so that stable treatment of the system is guaranteed and the minimum guarantee electric quantity requirement of a power grid system is met. According to the scheme, new carbon emission does not exist, meanwhile, the stability requirement of the minimum guaranteed electric quantity of the power grid can be met, and the scheme is a power generation solution capable of replacing a fossil fuel power station to serve as a guaranteed power source.

Description

technical field [0001] The invention belongs to the field of renewable energy and multi-energy complementarity, and specifically relates to a method for continuous and stable power generation of all renewable energy. Background technique [0002] At present, the main type of power generation is fossil fuel power generation. The power generation process needs to emit a large amount of carbon dioxide. Renewable energy is represented by photovoltaic power generation and wind power generation. The installed capacity continues to expand, but due to the uncertainty of resources, it is not suitable for power grid protection. Therefore, at this stage, fossil fuel power plants are still the main force to ensure power supply. With the increase in the demand for installed capacity of the power grid system, the carbon emissions of the power system are on the rise, and single renewable energy systems such as photovoltaics and wind power have never been able to Instead of thermal power, i...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J15/00H02J3/28H02J3/32
CPCH02J3/466H02J15/00H02J3/28H02J3/32H02J2300/20H02J2300/24H02J2300/28Y02E70/30Y02E10/56
Inventor 韩伟刘欣魏宏博马剑李晗吴永恩蒙佳陈伟
Owner NORTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP