Wind power direct connection electric heating furnace heat supply system

Abstract

The utility model discloses a wind power direct connection electric heating furnace heat supply system, and relates to the technical field of electric energy storage systems. The system comprises a net-forming type wind generating set (1), a transformer (2), an electric heating furnace (3), a power control module (5), an electrochemical energy storage device (6), a heat storage tank, a first conveying unit, a second conveying unit and a third conveying unit, the first conveying unit and the third conveying unit are used for being communicated with a heat consumer load, and the electric heating furnace (3) is communicated with the heat consumer load through the first conveying unit to form a first loop; the electric heating furnace (3) is communicated with the heat storage tank through a second conveying unit to form a second loop, and the heat storage tank is communicated with the heat consumer load through a third conveying unit to form a third loop; the system is stable in operation, energy-saving, carbon-reducing and high in economical efficiency through a net-forming type wind generating set, a transformer, an electric heating furnace, a power control module, an electrochemical energy storage device, a heat storage tank, a first conveying unit, a second conveying unit, a third conveying unit and the like.

Description

Technical Field

[0001] This utility model relates to the field of electrical energy storage system technology, and in particular to a wind power direct-connected electric heating furnace heating system. Background Technology

[0002] Currently, in existing wind power heating systems, wind turbines are connected to the power grid, which supports fluctuations in the wind turbine output. The wind turbines drive electric heating furnaces to provide external heat. When the wind turbine output is insufficient, power is drawn from the grid to meet the heating furnace's needs. The electric heating furnace has a stable power input, which does not cause fluctuations in heat load. However, this heating scheme relies on purchasing electricity from the grid for a portion of the heat load, resulting in poor economic efficiency. Furthermore, it cannot achieve local consumption of heat from distributed wind turbines in remote areas.

[0003] Due to differences in electricity pricing systems in different regions, the operation of wind power heating systems requires the consumption of electricity from the power grid. Therefore, the cost of purchasing electricity for wind power heating is an important factor in the promotion of wind power heating systems. An unreasonable system operation mode design will increase the operating costs of enterprises, seriously affect their economic benefits, and reduce their enthusiasm for participating in wind power heating projects.

[0004] Due to the fluctuations, intermittency, and randomness of wind turbine power output, the grid connection of wind turbines poses a serious threat to the safety, stability, and power quality of the power grid, leading to wind curtailment and a significant waste of clean energy.

[0005] Because wind power heating systems have a single, inflexible, and unreasonable operating mode, the economic efficiency of wind power heating projects already in operation is poor. Therefore, there is room for improvement and optimization of the operating mode of wind power heating systems. It is necessary to develop new operating modes, find more effective operating modes for absorbing wind power, and obtain the best economic operating scheme.

[0006] In the existing technology, the authorized publication number is CN218816644U, entitled "A Natural Gas Distributed Energy System Applicable to Oilfield Joint Stations." The main scenario is distributed oilfield transfer stations, specifically in oilfield oil and gas transfer station areas. These transfer stations are geographically dispersed, have heat load demands, and are supplied by gas-fired boilers. However, the combustion of natural gas releases large amounts of pollutants such as carbon and nitrogen oxides. Due to the dispersed locations of oilfield transfer stations, grid connection for distributed wind power is difficult. The use of gas-fired boilers for heating within the transfer stations results in high natural gas consumption and significant carbon emissions.

[0007] Therefore, the high natural gas consumption and carbon emissions at oilfield transfer stations have become urgent technical problems that need to be solved. Utility Model Content

[0008] This utility model provides a wind power direct-connected electric heating furnace heating system, which solves the technical problems of high natural gas consumption and high carbon emissions in oilfield transfer stations.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0010] A wind power direct-connected electric heating furnace heating system includes a grid-type wind turbine generator set, a transformer, an electric heating furnace, a power control module, an electrochemical energy storage device, a heat storage tank, a first conveying unit, a second conveying unit, and a third conveying unit. The first and third conveying units are both used to connect to the heat user load. The electric heating furnace is connected to the heat user load via the first conveying unit to form a first loop. The electric heating furnace is connected to the heat storage tank via the second conveying unit to form a second loop. The heat storage tank is connected to the heat user load via the third conveying unit to form a third loop. The grid-type wind turbine generator set, the transformer, and the electric heating furnace are sequentially electrically connected. The transformer is electrically connected to the electrochemical energy storage device, and the electrochemical energy storage device is electrically connected to the electric heating furnace. The power control module is individually electrically connected to each of the grid-type wind turbine generator set, the electric heating furnace, the electrochemical energy storage device, the first conveying unit, the second conveying unit, and the third conveying unit.

[0011] A further technical solution is as follows: the first conveying unit includes a primary side circulation pump of the electric heating furnace, a first electric valve, a second electric valve, a third electric valve, a first pipeline, and a second pipeline. The outlet of the electric heating furnace is connected to the return port of the electric heating furnace via the first electric valve, the first pipeline, the heat user load, the second electric valve, the second pipeline, the third electric valve, and the primary side circulation pump of the electric heating furnace to form a first loop. The power control module is electrically connected to the primary side circulation pump of the electric heating furnace, the first electric valve, the second electric valve, and the third electric valve, respectively.

[0012] A further technical solution is as follows: the second conveying unit includes a primary side circulation pump of the electric heating furnace, a third electric valve, a fourth electric valve, a fifth electric valve, a second pipeline, a third pipeline, a fourth pipeline, and a fifth pipeline. The outlet of the electric heating furnace is connected to the return port of the electric heating furnace via the fourth electric valve, the third pipeline, the fourth pipeline, the heat storage tank, the fifth electric valve, the fifth pipeline, the third electric valve, the second pipeline, and the primary side circulation pump of the electric heating furnace to form a second loop. The power control module is electrically connected to the primary side circulation pump, the third electric valve, the fourth electric valve, and the fifth electric valve of the electric heating furnace individually.

[0013] A further technical solution is that the primary side circulation pump of the electric heating furnace is a primary side circulation water pump of the electric heating furnace.

[0014] A further technical solution is as follows: the third conveying unit includes a heat storage circulation pump, a second electric valve, a sixth electric valve, a seventh electric valve, an eighth electric valve, a second pipeline, a third pipeline, a fourth pipeline, and a sixth pipeline. The outlet of the heat storage tank is connected to the inlet of the heat storage tank via the sixth electric valve, the sixth pipeline, the heat storage circulation pump, the seventh electric valve, the heat user load, the second electric valve, the second pipeline, the third pipeline, the eighth electric valve, and the fourth pipeline to form a third loop. The power control module is electrically connected to the heat storage circulation pump, the second electric valve, the sixth electric valve, the seventh electric valve, and the eighth electric valve, respectively.

[0015] A further technical solution is that the heat storage circulation pump is a heat storage circulation water pump.

[0016] A further technical solution is that the heat storage tank is a hot water storage tank.

[0017] A further technical solution includes hot user load.

[0018] The beneficial effects of adopting the above technical solution are as follows:

[0019] First, a wind power direct-connected electric heating furnace heating system includes a grid-type wind turbine generator set, a transformer, an electric heating furnace, a power control module, an electrochemical energy storage device, a heat storage tank, a first conveying unit, a second conveying unit, and a third conveying unit. The first and third conveying units are both used to connect to the heat user load. The electric heating furnace is connected to the heat user load via the first conveying unit to form a first loop. The electric heating furnace is connected to the heat storage tank via the second conveying unit to form a second loop. The heat storage tank is connected to the heat user load via the third conveying unit to form a third loop. The grid-type wind turbine generator set, the transformer, and the electric heating furnace are electrically connected in sequence. The transformer is electrically connected to the electrochemical energy storage device, and the electrochemical energy storage device is electrically connected to the electric heating furnace. The power control module is individually electrically connected to the grid-type wind turbine generator set, the electric heating furnace, the electrochemical energy storage device, the first conveying unit, the second conveying unit, and the third conveying unit. This technical solution achieves stable system operation, energy saving and carbon reduction, and high economic efficiency through grid-type wind turbine generators, transformers, electric heating furnaces, power control modules, electrochemical energy storage devices, heat storage tanks, first transmission units, second transmission units, and third transmission units.

[0020] Secondly, a combined structure of three conveying units is adopted, which is relatively reasonable and easy to control. The first conveying unit facilitates control of the first loop connection, enabling the electric heating furnace to supply heat to the user load. The second conveying unit facilitates control of the second loop connection, enabling the electric heating furnace to supply heat to the heat storage tank. The third conveying unit facilitates control of the third loop connection, enabling the heat storage tank to supply heat to the user load.

[0021] Third, it uses an electric heating furnace primary side circulating water pump, a thermal storage circulating water pump, and a hot water storage tank for building heating and domestic hot water, offering good cost performance. Attached Figure Description

[0022] Figure 1 These are structural diagrams of Embodiment 1 and Embodiment 2;

[0023] Figure 2 These are schematic diagrams of Embodiment 1 and Embodiment 2.

[0024] The components include: 1. Grid-type wind turbine generator set; 2. Transformer; 3. Electric heating furnace; 4. Heat user load; 5. Power control module; 6. Electrochemical energy storage device; 7. Hot water storage tank; 8. Primary side circulating water pump of electric heating furnace; 9. Heat storage circulating water pump; 10. First electric valve; 11. Second electric valve; 12. Third electric valve; 13. Fourth electric valve; 14. Fifth electric valve; 15. Sixth electric valve; 16. Seventh electric valve; 17. Eighth electric valve; 18. First pipeline; 19. Second pipeline; 20. Third pipeline; 21. Fourth pipeline; 22. Fifth pipeline; 23. Sixth pipeline. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] Example 1:

[0028] like Figure 1 and Figure 2As shown, this utility model discloses a wind power direct-connected electric heating furnace heating system, including a grid-type wind turbine generator set 1, a transformer 2, an electric heating furnace 3, a heat user load 4, a power control module 5, an electrochemical energy storage device 6, a hot water storage tank 7, a primary-side circulating water pump 8 for the electric heating furnace, a circulating water pump for the heat storage tank 9, a first electric valve 10, a second electric valve 11, a third electric valve 12, a fourth electric valve 13, a fifth electric valve 14, a sixth electric valve 15, a seventh electric valve 16, an eighth electric valve 17, a first pipeline 18, a second pipeline 19, a third pipeline 20, a fourth pipeline 21, a fifth pipeline 22, and a sixth pipeline 23. The grid-type wind turbine generator set 1, the transformer 2, and the electric heating furnace 3 are electrically connected in sequence. The power control module 5 is electrically connected to the grid-type wind turbine generator set 1, the electric heating furnace 3, and the electrochemical energy storage device 6, respectively. The transformer 2 is electrically connected to the electrochemical energy storage device 6, and the electrochemical energy storage device 6 is electrically connected to the electric heating furnace 3.

[0029] The outlet of the electric heating furnace 3 is connected to the inlet of the heat user load 4 via the first pipeline 18. The first electric valve 10 is fixedly connected to the first pipeline 18. The outlet of the heat user load 4 is connected to the return port of the electric heating furnace 3 via the second pipeline 19. The second electric valve 11 is fixedly connected to the second pipeline 19 on the side of the heat user load 4. The primary circulating water pump 8 of the electric heating furnace is fixedly connected to the second pipeline 19 on the side of the electric heating furnace 3. The third electric valve 12 is fixedly connected to the second pipeline 19 between the primary circulating water pump 8 of the electric heating furnace and the second electric valve 11.

[0030] One end of the third pipe 20 is connected to the first pipe 18. The junction of the third pipe 20 and the first pipe 18 is located on the first pipe 18 between the electric heating furnace 3 and the first electric valve 10. The other end of the third pipe 20 is connected to the second pipe 19. The junction of the third pipe 20 and the second pipe 19 is located on the second pipe 19 between the second electric valve 11 and the third electric valve 12. The fourth electric valve 13 is fixedly connected to the third pipe 20 on the side of the first pipe 18. The eighth electric valve 17 is fixedly connected to the third pipe 20 on the side of the second pipe 19.

[0031] One end of the fourth pipe 21 is connected to the third pipe 20. The junction of the fourth pipe 21 and the third pipe 20 is located on the third pipe 20 between the fourth electric valve 13 and the eighth electric valve 17. The other end of the fourth pipe 21 is connected to the inlet of the hot water storage tank 7.

[0032] One end of the sixth pipe 23 is connected to the outlet of the hot water storage tank 7, and the other end of the sixth pipe 23 is connected to the first pipe 18. The junction of the sixth pipe 23 and the first pipe 18 is located on the first pipe 18 between the first electric valve 10 and the heat user load 4. The sixth electric valve 15 is fixedly connected to the sixth pipe 23 on the side of the hot water storage tank 7, and the seventh electric valve 16 is fixedly connected to the sixth pipe 23 on the side of the heat user load 4. The heat storage circulating water pump 9 is fixedly connected to the sixth pipe 23 between the sixth electric valve 15 and the seventh electric valve 16.

[0033] One end of the fifth pipe 22 is connected to the sixth pipe 23. The junction of the fifth pipe 22 and the sixth pipe 23 is located on the sixth pipe 23 between the hot water storage tank 7 and the sixth electric valve 15. The other end of the fifth pipe 22 is connected to the second pipe 19. The junction of the fifth pipe 22 and the second pipe 19 is located on the second pipe 19 between the second electric valve 11 and the eighth electric valve 17.

[0034] like Figure 2 As shown, the power control module 5 is individually connected to the primary side circulating water pump 8 of the electric heating furnace, the heat storage circulating water pump 9, the first electric valve 10, the second electric valve 11, the third electric valve 12, the fourth electric valve 13, the fifth electric valve 14, the sixth electric valve 15, the seventh electric valve 16, and the eighth electric valve 17.

[0035] Among them, the electrochemical energy storage device 6 is a battery pack, such as a lithium-ion battery pack, a lead-acid battery pack, or a solid-state battery pack.

[0036] The work process is detailed below.

[0037] 1. Operating mode between the fan and the electric heating furnace.

[0038] 1) The grid-type wind turbine generator set 1 is transformed by transformer 2 and then laid by cable to the power distribution device of electric heating furnace 3.

[0039] 2) The control system of electric heating furnace 3 receives the power command signal from the power control module 5. The power control module 5 can realize bidirectional feedback between the grid-type wind turbine generator set 1 and the electric heating furnace 3.

[0040] 3) Power control module 5 can control the wind turbine's power generation P wind Feedback power P of electric heating furnace 负载 Energy storage capacity P 储能 By comparing the three factors, the following operating conditions were determined.

[0041] ①P wind >P 负载 Electrochemical energy storage device 6 has a charging margin, P wind -P 负载 >P储能 The grid-type wind turbine generator set 1 operates at limited power, and the electrochemical energy storage device 6 is charged.

[0042] ②P wind >P 负载 Electrochemical energy storage device 6 has a charging margin, P wind -P 负载 <P 储能 The grid-type wind turbine generator set 1 operates at maximum capacity, and the electrochemical energy storage device 6 is charged.

[0043] ③P wind <P 负载 Electrochemical energy storage device 6 has a discharge margin, P wind -P 负载 <P 储能 The electrochemical energy storage device 6 compensates for the power difference between the grid-type wind turbine generator 1 and the electric heating furnace 3.

[0044] ④P wind <P 负载 Electrochemical energy storage device 6 has a discharge margin, P wind -P 负载 >P 储能 The electrochemical energy storage device 6 discharges, while simultaneously reducing the load on the electric heating furnace 3 to achieve a balance between supply and demand.

[0045] ⑤P wind >P 负载 Electrochemical energy storage device 6 has no charging margin, grid-type wind turbine generator 1 operates under limited load, and electrochemical energy storage device 6 is on standby.

[0046] ⑥P wind <P 负载 The electrochemical energy storage device 6 has no discharge margin, so the load on the electric heating furnace 3 needs to be reduced to achieve a balance between supply and demand.

[0047] 2. Operating modes between electric heating furnaces, hot water storage tanks, and heat user loads.

[0048] 1) The electric heating furnace 3 directly supplies heat. The power generation of the grid-type wind turbine generator set 1 is equal to the heating power of the electric heating furnace 3. The high-temperature hot water generated by the electric heating furnace 3 is connected to the heat user load 4 through the first electric valve 10, and returns to the electric heating furnace 3 through the second electric valve 11, the third electric valve 12 and the primary side circulating water pump 8. The outlet of the electric heating furnace 3 is connected to the return port of the electric heating furnace 3 through the first electric valve 10, the first pipeline 18, the heat user load 4, the second electric valve 11, the second pipeline 19, the third electric valve 12 and the primary side circulating water pump 8, forming a first loop. The first loop is connected.

[0049] 2) The electric heating furnace 3 supplies and stores hot water simultaneously. The power generation of the grid-connected wind turbine generator 1 is greater than the heating power of the electric heating furnace 3. Hot water supply process: The electric heating furnace 3 generates high-temperature hot water, which is connected to the heat user load 4 via the first electric valve 10. The hot water then returns to the electric heating furnace 3 via the second electric valve 11, the third electric valve 12, and the primary-side circulating water pump 8, forming the first loop. Hot water storage process: The electric heating furnace 3 generates high-temperature hot water, which is connected to the hot water storage tank 7 via the fourth electric valve 13. The hot water then returns to the electric heating furnace 3 via the fifth electric valve 14, the third electric valve 12, and the primary-side circulating water pump 8. The outlet of the electric heating furnace 3 is connected to the return port of the electric heating furnace 3 via the fourth electric valve 13, the third pipeline 20, the fourth pipeline 21, the hot water storage tank 7, the fifth electric valve 14, the fifth pipeline 22, the third electric valve 12, the second pipeline 19, and the primary-side circulating water pump 8, forming the second loop, which is also connected.

[0050] 3) Electric heating furnace 3 and hot water storage tank 7 provide heating simultaneously. The power generation of the grid-connected wind turbine generator 1 is less than the heating power of electric heating furnace 3. Electric heating furnace heating process: High-temperature hot water generated by electric heating furnace 3 is connected to the heat user load 4 via the first electric valve 10, and returns to electric heating furnace 3 via the second electric valve 11, the third electric valve 12, and the primary side circulating water pump 8, thus completing the first loop. Hot water storage tank heating process: High-temperature hot water generated by hot water storage tank 7 is connected to the heat storage circulating water pump 9 via the sixth electric valve 15, and then to the heat user load 4 via the seventh electric valve 16. It then returns to hot water storage tank 7 via the second electric valve 11 and the eighth electric valve 17. The outlet of the hot water storage tank 7 is connected to the inlet of the hot water storage tank 7 via the sixth electric valve 15, the sixth pipeline 23, the hot water storage circulating pump 9, the seventh electric valve 16, the heat user load 4, the second electric valve 11, the second pipeline 19, the third pipeline 20, the eighth electric valve 17 and the fourth pipeline 21, forming a third loop. The third loop is connected.

[0051] The concept for the technological improvement is explained below.

[0052] This application utilizes a grid-connected wind turbine generator to directly drive an electric heating furnace for heating, with electrochemical energy storage configured on the wind turbine side to mitigate wind power fluctuations. A hot water storage tank is installed between the electric heating furnace and the heat user load to ensure stable heat load output.

[0053] The purpose of this application is twofold: firstly, to convert electricity generated by grid-connected wind turbines into heat to replace fossil fuels for heating; and secondly, to enable local consumption of distributed wind turbine generators, thereby reducing grid connection pressure on the power grid.

[0054] This application is mainly divided into two parts: the first part is the installation of electrochemical energy storage between the grid-type wind turbine generator and the electric heating furnace, and the second part is the installation of a hot water storage tank between the electric heating furnace and the heat user load.

[0055] The first part involves installing electrochemical energy storage between the grid-type wind turbine generator and the electric heating furnace, which mainly includes five modules: grid-type wind turbine generator, transformer, electric heating furnace, electrochemical energy storage device, and power control module.

[0056] Because the power output of grid-connected wind turbines fluctuates significantly with wind resource conditions and is difficult to control, electrochemical energy storage devices are considered to stabilize the turbine's output power. Since grid-connected wind turbines require a certain amount of electrical support during black start-up, starting-up energy storage devices are generally used to provide this support. This application requires the configuration of an energy storage device to stabilize turbine output; this energy storage device can also serve as the electrical support device for black start-up. Isolated grids of grid-connected wind turbines require their own voltage and frequency; the energy storage device can be used to provide the system voltage.

[0057] The second part involves installing a hot water storage tank between the electric heating furnace and the heat user load. This mainly includes: the electric heating furnace, the primary side circulating water pump of the electric heating furnace, the heat user load, the hot water storage tank, the heat storage circulating water pump, and valves and pipelines.

[0058] The size of the electrochemical energy storage device is configured according to the fluctuation range of the wind turbine power caused by wind speed fluctuations. The size of the hot water storage tank is determined by judging the start and end time of the false heat based on the difference between the actual power generation of the wind turbine and the external heat supply power of the electric heating furnace.

[0059] By rationally configuring the scale of electrochemical energy storage and hot water storage tanks, the power output of grid-type wind turbines can be stabilized, thereby ensuring stable output of thermal power from electric heating furnaces, ultimately reducing the consumption of fossil energy by gas boilers and enabling the local consumption of wind power.

[0060] The technical solution of this application is not directly connected to the power grid and does not require power grid support; it autonomously forms a network through the built-in control module of the grid-type fan, automatically establishing voltage and primary frequency and voltage regulation capabilities. To achieve stable operation of the heating system, an electrochemical energy storage device is installed between the grid-type fan and the electric heating furnace, and the power supply-load matching degree is optimized through a power control module; a hot water storage tank is installed between the electric heating furnace and the heat user load, and the output power of the electric heating furnace and the heat consumption power of the heat user load are matched through the built-in control system of the electric heating furnace.

[0061] The following analysis compares the technology with existing technologies.

[0062] This application presents a novel technical solution aimed at replacing gas-fired boilers at various transfer stations in the petroleum industry, thereby reducing pollutant emissions while absorbing green electricity. This application studies the effective utilization and absorption of distributed wind power, and for the first time adopts a grid-connected wind turbine generator to directly drive an electric heating furnace for heating, without connecting the wind turbine generator to the power grid. Using electricity generated by the grid-connected wind turbine to directly drive the electric heating furnace replaces the original gas-fired boiler for heating, reducing natural gas consumption and decreasing carbon and nitrogen oxide emissions.

[0063] The technical problems solved are explained below.

[0064] This invention solves the technical problem of grid connection difficulties. Existing wind power technology research mainly focuses on large-scale grid-connected wind turbine generators. However, in many regions, there are smaller-scale wind turbine generators that are difficult to connect to the grid but should not be phased out. This application uses grid-connected wind turbine generators to directly drive electric heating furnaces for heating, eliminating the connection between the wind turbine generators and the power grid, thus solving the technical problem of grid connection difficulties.

[0065] The technical problem of system instability has been resolved. Because wind turbine generators fluctuate in real time with local wind resources, the load on the electric heating furnace directly driven by the wind turbine generators fluctuates accordingly, leading to fluctuations in the external heating load. To address this fluctuation, this application proposes installing electrochemical energy storage between the wind turbine generators and the electric heating furnace. This serves two purposes: firstly, it satisfies the voltage construction and primary frequency and voltage regulation capabilities of the grid-type wind turbines; secondly, it mitigates the power fluctuations of the wind turbine generators. A hot water storage tank is added between the electric heating furnace and the heat user load to regulate the impact of the electric heating furnace's power fluctuations on the heat user load.

[0066] This invention solves the technical problems of high carbon emissions and poor economic efficiency. The wind power direct-connected electric heating furnace heating method proposed in this application can effectively replace the heating load supplied by gas boilers, reduce the natural gas consumption of gas boilers, and achieve the goals of reducing carbon emissions and nitrogen oxide emissions. By rationally configuring the scale of electrochemical energy storage and hot water storage tanks, the economic efficiency of heating is achieved.

[0067] The technical effects achieved are described below.

[0068] The system operates stably. Utilizing the abundant wind resources in the oilfield area, the system employs wind power directly connected to an electric heating furnace. By optimizing the power supply-load matching and source-load interaction capabilities, it achieves stable operation of the electric heating furnace heating system after clean replacement with the original gas heating system, as well as the economic efficiency of the system's electrothermal coupling operation, thus enabling a clean replacement of the oilfield.

[0069] It is energy-saving, carbon-reducing, and highly economical. The grid-type wind turbine generators directly drive the electric heating furnace heating system, gradually reducing the natural gas consumption of the gas boiler, thereby achieving the goals of energy conservation, carbon reduction, and local consumption of wind power.

[0070] A new technological approach. To promote clean energy substitution within the station, electrification upgrades will be carried out using wind power directly connected to electric heating furnaces, providing a technological approach and parameters for clean heat substitution in other similar stations.

[0071] The market prospects and significance are explained below.

[0072] With the increasing application of distributed generation, there are more and more places where distributed generation can be used, which has led to the wider application of small-scale grid-connected wind turbine generators. This type of system is of great significance for reducing environmental pollution, improving air quality, and increasing wind energy utilization.

[0073] Example 2:

[0074] like Figure 1 and Figure 2 As shown, this utility model discloses a wind power direct-connected electric heating furnace heating system, including a grid-type wind turbine generator set 1, a transformer 2, an electric heating furnace 3, a heat user load 4, a power control module 5, an electrochemical energy storage device 6, a hot water storage tank 7, a primary-side circulating water pump of the electric heating furnace 8, a heat storage circulating water pump 9, a first electric valve 10, a second electric valve 11, a third electric valve 12, a fourth electric valve 13, a fifth electric valve 14, a sixth electric valve 15, a seventh electric valve 16, an eighth electric valve 17, a first pipeline 18, a second pipeline 19, a third pipeline 20, a fourth pipeline 21, a fifth pipeline 22, and a sixth pipeline 23. The similarities are not repeated.

[0075] Among them, the electrochemical energy storage device 6 is a supercapacitor, such as an electric double-layer capacitor or a hybrid supercapacitor.

[0076] Example 3:

[0077] This utility model discloses a wind power direct-connected electric heating furnace heating system, including a grid-type wind turbine generator set 1, a transformer 2, an electric heating furnace 3, a heat user load 4, a power control module 5, an electrochemical energy storage device 6, a heat storage oil tank, a primary side circulating oil pump for the electric heating furnace, a heat storage circulating water pump 9, a first electric valve 10, a second electric valve 11, a third electric valve 12, a fourth electric valve 13, a fifth electric valve 14, a sixth electric valve 15, a seventh electric valve 16, an eighth electric valve 17, a first pipeline 18, a second pipeline 19, a third pipeline 20, a fourth pipeline 21, a fifth pipeline 22, and a sixth pipeline 23. The similarities are not repeated.

[0078] Replace the heat storage tank 7 in Example 1 with a heat storage oil tank, replace the primary circulating water pump 8 of the electric heating furnace in Example 1 with a primary circulating oil pump of the electric heating furnace, and replace the heat storage circulating water pump 9 in Example 1 with a heat storage circulating oil pump.

[0079] Thermal storage tanks can be used for storing thermal energy at medium and high temperatures of 150–400℃, and can be used for industrial waste heat recovery and chemical production.

[0080] Compared to the above embodiments, off-grid photovoltaic generator sets can also be used to replace grid-connected wind turbine generator sets, and the similarities will not be repeated here.

[0081] Compared to the above embodiments, off-grid photovoltaic generator sets and grid-connected wind turbine generator sets can also be connected in parallel to further increase the applicability of the system. The similarities will not be repeated here.

Claims

1. A wind-powered direct-drive electric heating furnace heating system, characterized in that: The system includes a grid-type wind turbine generator set (1), a transformer (2), an electric heating furnace (3), a power control module (5), an electrochemical energy storage device (6), a heat storage tank, a first transmission unit, a second transmission unit, and a third transmission unit. The first and third transmission units are used to connect to the load of the heat user. The electric heating furnace (3) is connected to the load of the heat user through the first transmission unit to form a first loop. The electric heating furnace (3) is connected to the heat storage tank through the second transmission unit to form a second loop. The heat storage tank is connected to the load of the heat user through the third transmission unit to form a third loop. The grid-type wind turbine generator set (1), the transformer (2), and the electric heating furnace (3) are electrically connected in sequence. The transformer (2) is electrically connected to the electrochemical energy storage device (6). The electrochemical energy storage device (6) is electrically connected to the electric heating furnace (3). The power control module (5) is electrically connected to the grid-type wind turbine generator set (1), the electric heating furnace (3), the electrochemical energy storage device (6), the first transmission unit, the second transmission unit, and the third transmission unit, respectively.

2. The wind power direct-drive electric heating furnace heating system according to claim 1, characterized in that: The first conveying unit includes a primary side circulation pump for an electric heating furnace, a first electric valve (10), a second electric valve (11), a third electric valve (12), a first pipeline (18), and a second pipeline (19). The outlet of the electric heating furnace (3) is connected to the return port of the electric heating furnace (3) via the first electric valve (10), the first pipeline (18), the heat user load, the second electric valve (11), the second pipeline (19), the third electric valve (12), and the primary side circulation pump of the electric heating furnace to form a first loop. The power control module (5) is electrically connected to the primary side circulation pump of the electric heating furnace, the first electric valve (10), the second electric valve (11), and the third electric valve (12) respectively.

3. The wind power direct-drive electric heating furnace heating system according to claim 1, characterized in that: The second conveying unit includes a primary side circulation pump for an electric heating furnace, a third electric valve (12), a fourth electric valve (13), a fifth electric valve (14), a second pipeline (19), a third pipeline (20), a fourth pipeline (21), and a fifth pipeline (22). The outlet of the electric heating furnace (3) is connected to the return port of the electric heating furnace (3) via the fourth electric valve (13), the third pipeline (20), the fourth pipeline (21), the heat storage tank, the fifth electric valve (14), the fifth pipeline (22), the third electric valve (12), the second pipeline (19), and the primary side circulation pump of the electric heating furnace to form a second loop. The power control module (5) is electrically connected to the primary side circulation pump, the third electric valve (12), the fourth electric valve (13), and the fifth electric valve (14) of the electric heating furnace, respectively.

4. A wind power direct-drive electric heating furnace heating system according to claim 2 or 3, characterized in that: The primary circulating pump of the electric heating furnace is a primary circulating water pump (8) of the electric heating furnace.

5. A wind power direct-drive electric heating furnace heating system according to claim 1, characterized in that: The third conveying unit includes a heat storage circulation pump, a second electric valve (11), a sixth electric valve (15), a seventh electric valve (16), an eighth electric valve (17), a second pipeline (19), a third pipeline (20), a fourth pipeline (21), and a sixth pipeline (23). The outlet of the heat storage tank is connected to the inlet of the heat storage tank via the sixth electric valve (15), the sixth pipeline (23), the heat storage circulation pump, the seventh electric valve (16), the heat user load, the second electric valve (11), the second pipeline (19), the third pipeline (20), the eighth electric valve (17), and the fourth pipeline (21) to form a third loop. The power control module (5) is electrically connected to the heat storage circulation pump, the second electric valve (11), the sixth electric valve (15), the seventh electric valve (16), and the eighth electric valve (17) respectively.

6. A wind power direct-drive electric heating furnace heating system according to claim 5, characterized in that: The heat storage circulation pump is a heat storage circulation water pump (9).

7. A wind power direct-drive electric heating furnace heating system according to claim 1, characterized in that: The heat storage tank is a hot water storage tank (7).

8. A wind power direct-drive electric heating furnace heating system according to claim 1, characterized in that: It also includes hot user load (4).

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