Method based on new energy consumption and energy storage

Abstract

The invention discloses a method based on new energy consumption and energy storage. A new energy abandoned electricity quantity, an electric boiler, an electric boiler steam pipeline, a thermal power station boiler, a thermal power station boiler steam pipeline, a steam convergence control valve, a main steam pipeline and a steam turbine are included. The new energy abandoned electricity quantity is connected with the electric boiler, the electric boiler steam pipeline is connected with the electric boiler, the electric boiler steam pipeline is connected with the thermal power station boiler, the thermal power station boiler steam pipeline is connected with the thermal power station boiler, and steam of the electric boiler and steam of the thermal power station boiler are connected with the main steam pipeline through the steam converging control valve. And connecting with a steam turbine. Compared with the prior art, the method has the advantages that the advantages of thermal power generation are taken into consideration, part of new energy power is not directly connected to a grid, base load and peak regulation are directly completed in a thermal power station through thermal power station grid connection, and the problems of difficult prediction, difficult control, difficult scheduling and wind and light abandoning caused by new energy grid connection of a power generation side are solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy power generation technology methods, specifically a method based on new energy consumption and energy storage. Background Art

[0002] Wind power, hydropower, and photovoltaic power generation have their limitations and are easily constrained by natural conditions. Source and load uncertainty make forecasting and regulation difficult. Given the grid's stable installed capacity and the limited scale of grid-connected power generation, large-scale wind and photovoltaic deployment is not a problem; large-scale absorption is the real challenge. The grid can only accommodate a maximum of 30% of unstable power, meaning 70% of this unstable power cannot be absorbed, leading to curtailment. To accommodate more clean energy, the grid must either build sufficient energy storage or leverage coal and thermal power for peak load regulation.

[0003] Currently, other energy storage solutions that are compatible with new energy consumption have pain points: the disadvantage of electrochemical energy storage batteries is their short lifespan, and operational safety and environmental issues need to be improved; mechanical energy storage: pumped storage has the disadvantage of requiring geographical resources and a long construction period; flywheel energy storage is costly, noisy, and short-lived, and cannot meet the needs. All of the above energy storage solutions also have extreme situations where there is no electricity to store, cross-regional power cannot be continuously output, and the supporting energy storage is exhausted.

[0004] The development of the wind and photovoltaic industries has come at the expense of some thermal power generation indicators and equipment health. Deep peak shaving in thermal power generation not only significantly reduces unit efficiency but also forces equipment to operate at low loads and within a wide range of load fluctuations, severely impacting the unit's operating lifespan. Although deep peak shaving offers compensation (e.g., 0.5 yuan / kWh), when units operate at 30% load, the actual compensation is insufficient to cover the increased fuel and maintenance costs. Prolonged low-load operation poses multiple challenges, including combustion safety, equipment lifespan, economic viability, and environmental compliance.

[0005] In order to cope with extreme weather conditions where there is no electricity to store, fossil energy power generation is not affected by natural weather and remains a reliable power generation guarantee. The power grid must maintain enough thermal power generating units to cope with extreme weather conditions, which leads to idleness and waste in normal times. In addition, the power grid provides additional compensation to balance the losses of thermal power peak regulation, resulting in the inability to systematically reduce the cost of grid-connected power generation. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a method and equipment that can solve the large-scale consumption and large-scale energy storage of new energy.

[0007] In order to solve the above problems, the technical solution of the present invention is: a method based on new energy consumption and storage, comprising: a new energy abandoned power, an electric boiler, an electric boiler steam pipeline, a thermal power station boiler, a thermal power station boiler steam pipeline, a steam inlet control valve, a main steam pipeline, and a steam turbine;

[0008] The abandoned electricity from new energy is connected to the electric boiler, and the steam pipe of the electric boiler is connected to the electric boiler, the steam pipe of the electric boiler is connected to the steam inlet control valve, the steam inlet control valve is connected to the main steam pipe, and the main steam pipe is connected to the steam turbine, so that the superheated steam in the electric boiler enters the steam turbine to perform work; the steam pipe of the thermal power station boiler is connected to the steam inlet control valve, and it is connected to the thermal power station boiler, so that the superheated steam in the thermal power station boiler enters the steam turbine to perform work.

[0009] Furthermore, the superheated steam generated by the electric boiler and the superheated steam generated by the thermal power station boiler are coupled to jointly perform work on the steam turbine or generate electricity. The superheated steam generated by the electric boiler replaces a portion of the superheated steam generated by the thermal power station boiler, which is beneficial to reducing the fuel consumption of the power station boiler. The abandoned power of new energy is usually waste power, which can not only enable the abandoned power of new energy to be indirectly connected to the grid and consumed, but also achieve carbon emission reduction of the thermal power plant.

[0010] Furthermore, the steam turbine is provided with a steam-assisted regulation system, which includes a main steam valve, a regulating valve and a speed governor. The main steam valve controls the main valve for steam to enter the steam turbine. The regulating valve adjusts the steam flow according to load demand. The speed governor maintains a stable speed by adjusting the valve opening.

[0011] Furthermore, the boiler combustion system of the thermal power station includes a fuel supply system, which includes a coal-fired boiler, an air supply system and a flue gas treatment system. The coal-fired boiler includes a pulverizer, a pulverized coal pipeline and a burner. The air supply system includes a blower, an air duct and an air preheater. The blower provides the air required for combustion, and the air in the air duct and the air preheater is heated and then sent into the furnace. The flue gas treatment system uses an electrostatic precipitator or a bag filter to remove particulate matter in the flue gas, and the desulfurization tower FGD uses wet or dry desulfurization to reduce SO2 emissions. The denitrification device SCR / SNCR reduces NOx emissions.

[0012] Furthermore, the thermal power plant automatically adjusts the output ratio of the electric boiler to the thermal power plant boiler based on the peak and low seasons of renewable energy generation or the health of the thermal power units. Using control valves, the superheated steam in the main steam pipeline is dynamically controlled, thereby managing and controlling the steam source for the steam turbine. This allows for dynamic control of the amount of curtailed renewable energy generation and the thermal power plant's fuel consumption, achieving both renewable energy consumption and energy storage.

[0013] The advantages of the present invention compared with the existing technology are:

[0014] The present invention takes into account the advantages of thermal power generation. Part of the new energy power is not directly connected to the grid, but is connected to the grid through thermal power stations. The base load and peak load regulation are completed directly at the thermal power stations, eliminating the problems of difficult prediction, difficult control, difficult scheduling and wind and solar power abandonment caused by the new energy grid connection on the power generation side, thereby achieving more relaxed grid scheduling and reducing the losses caused by frequent peak regulation of thermal power. Moreover, since this part of the new energy power is not directly connected to the grid, the power grid does not need additional backup power supply to deal with it, and thus does not need to further systematically reduce the cost of grid access power generation. After the transformation of the present invention, the abandoned new energy power is connected to the grid and absorbed by the thermal power station. Without special geographical conditions, it can be expanded and transformed at the site of the original thermal power station, thereby expanding the scale of new energy grid connection across the country, solving the large-scale grid connection and absorption of new energy while still ensuring stable power supply on the power generation side and ensuring safe operation of the power grid.

[0015] In order to achieve the above advantages, the technical solution in this application emphasizes coupling the superheated steam from the thermal power plant with the superheated steam generated by the conversion of waste electricity from renewable energy sources, connecting them together with the main steam pipeline, and using a control valve to dynamically control the superheated steam in the main steam pipeline, thereby realizing the management and control of the steam source of the steam turbine. In this way, the amount of waste electricity from renewable energy sources and the fuel consumption of the thermal power plant can be dynamically controlled, thereby achieving the purpose of new energy consumption and energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a method based on new energy consumption and storage in the present invention.

[0017] As shown in the figure: 1. Abandoned electricity from new energy sources; 2. Electric boiler; 3. Steam pipeline of electric boiler; 4. Boiler of thermal power station; 5. Steam pipeline of thermal power station boiler; 6. Steam inlet control valve; 7. Main steam pipeline; 8. Steam turbine. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described below with reference to the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0019] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1As shown, a method based on new energy consumption and energy storage includes new energy abandoned power 1, electric boiler 2, electric boiler steam pipeline 3, thermal power station boiler 4, thermal power station boiler steam pipeline 5, steam inlet control valve 6, main steam pipeline 7, and steam turbine 8; Figure 1 As shown, the power station boiler 4 is constructed / renovated based on the existing thermal power plant boiler system. The new energy abandoned electricity 1 is connected to the electric boiler 2, and the electric boiler steam pipe 3 is connected to the electric boiler 2. The electric boiler steam pipe 3 is connected to the steam inlet control valve 6, and the steam inlet control valve 6 is connected to the main steam pipe 7, and the main steam pipe 7 is connected to the steam turbine 8, so that the superheated steam in the electric boiler 2 enters the steam turbine 8 to perform work. The thermal power station boiler steam pipe 5 is connected to the steam inlet control valve 6, and it is connected to the thermal power station boiler 4, so that the superheated steam in the thermal power station boiler 4 enters the steam turbine 8 to perform work.

[0022] The superheated steam generated by the electric boiler 2 and the superheated steam generated by the power station boiler 4 are coupled to jointly perform work on the steam turbine 8. The rotation of the steam turbine drives the generator to generate electricity. The superheated steam generated by the electric boiler 2 replaces a portion of the superheated steam generated by the power station boiler 4, which is beneficial to reducing the fuel consumption of the power station boiler 4 and achieving carbon emissions from thermal power plants.

[0023] The steam turbine 5 is provided with a steam auxiliary regulation system, which includes a main steam valve, a regulating valve and a speed governor. The main steam valve controls the main valve for steam to enter the steam turbine. The regulating valve adjusts the steam flow according to the load demand. The speed governor maintains the speed stability by adjusting the valve opening.

[0024] In specific use, superheated steam generated by the conversion of curtailed renewable energy power into work in electric boiler 2 is transferred via steam pipe 3. A steam inlet control valve 6 manages and regulates the superheated steam from the electric boiler and the thermal power plant boiler, thereby enabling the electric boiler superheated steam to partially replace the superheated steam generated by the thermal power plant's combustion of chemical energy. The constant steam, controlled and regulated by steam inlet control valve 6, provides a constant speed and pressure to the steam turbine. The load variation of the steam turbine is determined by the steam quantity, which is determined by steam consumption, and carbon emissions are determined by consumption. In this process, the steam quantity is no longer solely generated by the thermal power plant boiler. Instead, it is dynamically adjusted based on curtailed renewable energy power and the thermal power plant's own power generation conditions. This allows the power grid to purchase electricity from the thermal power plant, which in turn purchases electricity from the renewable energy source. The thermal power plant provides a stable load of electricity based on the grid's needs. The grid is responsible for absorbing the thermal power, while the thermal power plant is responsible for absorbing the remaining curtailed renewable energy power. Thermal power plants can automatically adjust the output ratio of electric boilers to thermal power plant boilers based on the peak and off-peak periods and seasons of renewable energy generation. This not only absorbs renewable energy generation but also automatically adjusts the charge during peak and off-peak periods of renewable energy generation, delivering stable power to the grid. Furthermore, by adjusting the output ratio of electric boilers to thermal power plant boilers, electric boilers can be used more efficiently during peak renewable energy generation periods, replacing and storing fossil fuels that would otherwise be consumed by thermal power plant boilers. This process converts electrical energy into fossil energy and then converts fossil energy back into electrical energy, thus achieving renewable energy storage.

[0025] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A method based on new energy consumption and storage, characterized by: It includes the abandoned electricity of renewable energy (1), electric boiler (2), electric boiler steam pipeline (3), thermal power station boiler (4), thermal power station boiler steam pipeline (5), steam inlet control valve (6), main steam pipeline (7) and steam turbine (8); The abandoned new energy power (1) is connected to the electric boiler (2), and the electric boiler steam pipeline (3) is connected to the electric boiler (2), the electric boiler steam pipeline (3) is connected to the thermal power station boiler steam pipeline (5) is connected to the thermal power station boiler (4), and the steam of the electric boiler (2) and the steam of the power station boiler (4) are respectively connected to the main steam pipeline (7) through the steam inlet control valve (6), and are further connected to the steam turbine (8).

2. The method for absorbing and storing new energy according to claim 1, characterized in that: The electric boiler (2) is connected to the abandoned new energy power (1), and the electric boiler steam pipe (3) is connected to the electric boiler (2). The electric boiler (2) is provided with an electric steam generator, a heat accumulator, a pressurizing system, and a control system. The electric boiler converts the electric energy of the new energy into steam, thereby realizing the conversion and consumption of the abandoned new energy power. The steam of the electric boiler (2) is connected to the steam inlet control valve (6) through the electric boiler steam pipe (3).

3. The method for absorbing and storing new energy according to claim 1, characterized in that: The thermal power station boiler (4) is in communication with a power station boiler steam pipeline (5), and the steam of the thermal power station boiler (4) is in communication with a steam inlet control valve (6) via the thermal power station boiler steam pipeline (5).

4. The method for absorbing and storing new energy according to claim 1, characterized in that: The steam of the thermal power station boiler (4) and the steam of the electric boiler (2) are connected to a main steam pipe (7) via a steam inlet control valve (6) to achieve steam regulation coupling. The main steam pipe (7) is connected to a steam turbine (8).

5. The method for absorbing and storing new energy according to claim 1, characterized in that: The steam turbine (8) is provided with a steam auxiliary regulating system, which comprises a main steam valve, a regulating valve and a speed governor. The main steam valve controls the main valve for steam to enter the steam turbine. The regulating valve adjusts the steam flow according to the load demand. The speed governor maintains the speed stability by adjusting the valve opening.

6. The method for absorbing and storing new energy according to claim 1, characterized in that: The combustion system of the thermal power station boiler (4) includes a fuel supply system, the fuel supply system includes a coal-fired boiler, an air supply system and a flue gas treatment system, the coal-fired boiler includes a pulverizer, a pulverized coal pipeline and a burner, the air supply system includes a blower, an air duct and an air preheater, the blower provides air required for combustion, the air in the air duct and the air preheater is heated and then sent to the furnace, the flue gas treatment system includes an electrostatic precipitator or a bag dust collector to remove particulate matter in the flue gas, and a desulfurization tower (FGD) is a wet method or a dry method.

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