A device and method based on fuel cell system power generation technology

Abstract

The present invention provides a device and method based on fuel cell system power generation technology, comprising: a fuel cell, a load prediction module, a detection module, and a controller; the load prediction module is used to predict the fuel cell's power supply load based on the fuel cell's historical load data and a pre-established prediction model; the fuel cell is used to supply power to a target device based on the predicted power supply load; the detection module is used to detect the actual load of the target device and transmit the detected load to the load prediction module and the controller; the controller is used to adjust the fuel cell's power supply load based on the actual load; and the load prediction module is further used to modify the pre-established prediction model based on the actual load. By predicting the fuel cell's power supply load based on historical load, and then feedback-adjusting the prediction model by detecting the actual load of the target device, the power supply accuracy of the fuel cell can be improved, thereby improving the power supply stability of the fuel cell and ensuring the normal operation of the target device.

Description

Technical Field

[0001] The present application belongs to the field of new energy technology, and in particular relates to a device and method for power generation technology based on a fuel cell system. Background Art

[0002] Fuel cell power generation technology is a new energy technology. When introduced into the traditional power system, it can not only reduce the cost of power generation to a certain extent, but also reduce the pollution caused by thermal power generation.

[0003] Existing technologies usually determine the start-up time and output load of a fuel cell by predicting the fuel cell power supply load based on historical load. However, due to the diversity and complexity of power systems, conventional prediction methods are difficult to accurately predict the required output load, making the power supply of the fuel cell unstable and affecting the operation of the target equipment being powered. Summary of the Invention

[0004] In view of this, the present invention provides a device and method based on fuel cell system power generation technology, aiming to solve the problem that conventional prediction methods are difficult to accurately predict the required output load, resulting in unstable power supply of the fuel cell.

[0005] A first aspect of an embodiment of the present invention provides a device based on fuel cell system power generation technology for supplying power to a target device in a power system, characterized by comprising: a fuel cell, a load prediction module, a detection module, and a controller;

[0006] The fuel cell is connected to the target device; the load prediction module is connected to the fuel cell; the detection module is connected to the target device; the detection module is connected to the load prediction module and the controller respectively; the controller is connected to the fuel cell;

[0007] The load prediction module is used to predict the power supply load of the fuel cell based on the historical load data of the fuel cell and a pre-established prediction model;

[0008] The fuel cell is used to supply power to the target device according to the predicted power supply load;

[0009] The detection module is used to detect the actual load of the target device and send it to the load prediction module and the controller;

[0010] The controller is used to adjust the power supply load of the fuel cell according to the actual load;

[0011] The load forecasting module is further configured to modify a pre-established forecasting model according to the actual load.

[0012] In a possible implementation, the device further includes a stability calculation module;

[0013] The stability calculation module is used to calculate the power supply stability of the target device according to the predicted power supply load and the power supply parameters of the power system for supplying power to the target device, and send the calculated value to the load prediction module.

[0014] In a possible implementation, the load prediction module is further configured to modify a pre-established prediction model according to the power supply stability.

[0015] In a possible implementation, the device further includes a cost calculation module;

[0016] The cost calculation module is used to calculate the cost savings corresponding to the historical load data of the fuel cell; wherein the cost savings is equal to the cost required to supply the same load with the power system minus the power supply cost of the fuel cell.

[0017] In a possible implementation, the cost calculation module is connected to the load forecasting module;

[0018] The load forecasting module is used to optimize the pre-established forecasting model with maximizing the cost saving as the objective function.

[0019] In a possible implementation, the device further includes a lithium battery module; the lithium battery module is connected to the fuel cell and the target device respectively;

[0020] The lithium battery module is used to receive part of the electric energy output by the fuel cell when the maximum power supply load of the fuel cell is greater than the predicted power supply load;

[0021] The lithium battery module is further configured to supply power to the target device when the maximum power supply load of the fuel cell is not greater than the predicted power supply load.

[0022] In a possible implementation, the device further includes a communication module;

[0023] The communication module is connected to the controller;

[0024] The communication module is used to receive the dispatching instructions issued by the power system dispatching center and send them to the controller;

[0025] The controller is configured to control the fuel cell to supply power to the target device according to the power supply load indicated by the scheduling instruction.

[0026] In a possible implementation, the device further includes a loss calculation module; the loss calculation module is connected to the communication module;

[0027] The loss calculation module is used to calculate the fuel loss of the fuel cell and report it to the power system dispatching center through the communication module.

[0028] In a possible implementation, the fuel cell is a hydrogen fuel cell; the device further includes a wind-solar-grid interface circuit;

[0029] The wind-solar grid interface circuit is used to store energy in the hydrogen fuel cell by electrolyzing water through a wind power generation grid or a photovoltaic power generation grid.

[0030] In a possible implementation, the device further includes a display module; the display module is connected to the controller; and the display module is used to display operating status information of the fuel cell.

[0031] A second aspect of an embodiment of the present invention provides a method for generating electricity based on a fuel cell system, comprising:

[0032] Obtaining the power supply load of the fuel cell predicted by the load prediction module based on the historical load data of the fuel cell and a pre-established prediction model;

[0033] controlling the fuel cell to supply power to the target device according to the predicted power supply load;

[0034] adjusting the power supply load of the fuel cell by the controller according to the actual load of the target device detected by the detection module;

[0035] The pre-established prediction model is modified according to the actual load.

[0036] The device and method based on fuel cell system power generation technology provided by the embodiment of the present invention include: a fuel cell, a load prediction module, a detection module, and a controller; the load prediction module is used to predict the power supply load of the fuel cell based on the historical load data of the fuel cell and a pre-established prediction model; the fuel cell is used to supply power to the target device according to the predicted power supply load; the detection module is used to detect the actual load of the target device and send it to the load prediction module and the controller; the controller is used to adjust the power supply load of the fuel cell according to the actual load; the load prediction module is also used to correct the pre-established prediction model according to the actual load. By determining the start-up time and output load of the fuel cell by predicting the power supply load of the fuel cell based on the historical load, and then feedback-adjusting the prediction model by detecting the actual load of the target device, the power supply accuracy of the fuel cell can be improved, thereby improving the power supply stability of the fuel cell and ensuring the normal operation of the target device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 is a schematic structural diagram of a device based on a fuel cell system power generation technology provided by an embodiment of the present invention;

[0039] Figure 2 is a schematic structural diagram of a device based on fuel cell system power generation technology provided by another embodiment of the present invention;

[0040] Figure 3 is a structural schematic diagram of a device based on fuel cell system power generation technology provided by another embodiment of the present invention;

[0041] Figure 4 This is a flowchart of an implementation method based on fuel cell system power generation technology provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0043] Figure 1 This is a schematic diagram of the structure of a device based on fuel cell system power generation technology provided by an embodiment of the present invention. Figure 1 As shown, in this embodiment, a device 1 based on fuel cell system power generation technology is used to supply power to a target device in a power system, including: a fuel cell 11, a load prediction module 12, a detection module 13, and a controller 14;

[0044] The fuel cell 11 is connected to the target device; the load prediction module 12 is connected to the fuel cell 11; the detection module 13 is connected to the target device; the detection module 13 is connected to the load prediction module 12 and the controller 14 respectively; the controller 14 is connected to the fuel cell 11;

[0045] The load prediction module 12 is used to predict the power supply load of the fuel cell 11 based on the historical load data of the fuel cell 11 and a pre-established prediction model;

[0046] The fuel cell 11 is used to supply power to the target device according to the predicted power supply load;

[0047] The detection module 13 is used to detect the actual load of the target device and send it to the load prediction module 12 and the controller 14;

[0048] The controller 14 is used to adjust the power supply load of the fuel cell 11 according to the actual load;

[0049] The load forecasting module 12 is further configured to modify the pre-established forecasting model according to the actual load.

[0050] In this embodiment, the fuel cell 11 can be hydrogen, hydrocarbons, natural gas, methanol, gasoline, or the like, without limitation. The pre-established prediction model can be a regression prediction model, a gray prediction model, a neural network prediction model, or the like, without limitation. The detection module 13 can utilize a power data acquisition device, such as a smart meter, to detect the actual load of the target device.

[0051] The target device is typically powered primarily by the power system. When adding a fuel cell for hybrid power, grid-connected equipment such as a converter is typically required between the fuel cell and the target device, taking into account the stability requirements of the power system and the power supply needs of the target device. These grid-connected devices often affect the fuel cell's power load forecast, causing the load output by the fuel cell to be inconsistent with the load received by the target device. In this embodiment, the controller 14 effectively improves power supply stability and ensures the operation of the target device by adjusting the fuel cell's power load in real time based on the actual load. The prediction model is then corrected based on the actual load to improve the accuracy of the next load forecast.

[0052] In this embodiment, the start-up time and output load of the fuel cell are determined by predicting the fuel cell power supply load based on historical load, and then the prediction model is feedback-adjusted by detecting the actual load of the target device. This can improve the power supply accuracy of the fuel cell 11, thereby improving the power supply stability of the fuel cell 11 and ensuring the normal operation of the target device.

[0053] In some embodiments, the apparatus further comprises a stability calculation module;

[0054] The stability calculation module is used to calculate the power supply stability of the target device according to the predicted power supply load and the power supply parameters of the power system for supplying power to the target device, and send the calculation result to the load prediction module 12 .

[0055] In some embodiments, the load forecasting module 12 is further configured to modify a pre-established forecasting model according to power supply stability.

[0056] Frequent starting and stopping of the fuel cell 11, and changes in the ratio of power supplied by the fuel cell 11 to the power system to the target device, can lead to reduced power supply stability and power quality. Therefore, in this embodiment, the predicted power load and the power supply parameters of the power system supplying power to the target device are used to calculate the impact of incorporating the predicted power load into the power system on power supply stability. The prediction model is then corrected before outputting the predicted power load. The corrected prediction model can then be used to re-predict the load required by the fuel cell 11 to ensure power supply stability for the target device.

[0057] In some embodiments, the apparatus further comprises a cost calculation module;

[0058] The cost calculation module is used to calculate the cost savings corresponding to the historical load data of the fuel cell 11 ; wherein the cost savings is equal to the cost required to supply the same load as the power system minus the power supply cost of the fuel cell 11 .

[0059] In some embodiments, the cost calculation module is connected to the load forecasting module 12;

[0060] The load forecasting module 12 is used to optimize the pre-established forecasting model with maximizing cost savings as the objective function.

[0061] Fuel cell power generation is generally cheaper than thermal power generation. However, due to issues such as limited fuel cell scale, high material costs, and the additional energy consumption required to start and stop the fuel cell 11, more fuel cell power generation is not necessarily better. In this embodiment, by calculating the cost savings corresponding to historical loads, a relationship between load and cost savings can be fitted. The prediction model is then optimized to maximize cost savings, thereby reducing power supply costs.

[0062] In any of the above embodiments, whether to prioritize power supply stability or cost reduction depends on the target device and is not limited here. For example, when the target power supply device is a delicate, precision device with high power supply stability requirements, power supply stability should be prioritized. When the target device is a common power supply device such as a light bulb, power supply cost efficiency should be prioritized. In some embodiments, the weighting of stability and cost efficiency can be determined based on the type of target device, and the above prediction model can be influenced according to their respective weightings.

[0063] Figure 2 FIG. 1 is a schematic structural diagram of a device 1 based on a fuel cell system power generation technology according to another embodiment of the present invention. Figure 2 As shown, in some embodiments, the device further includes a lithium battery module 21; the lithium battery module 21 is connected to the fuel cell 11 and the target device respectively;

[0064] The lithium battery module 21 is used to receive part of the electric energy output by the fuel cell 11 when the maximum power supply load of the fuel cell 11 is greater than the predicted power supply load;

[0065] The lithium battery module 21 is also used to supply power to the target device when the maximum power supply load of the fuel cell 11 is not greater than the predicted power supply load.

[0066] Due to limitations in materials, size, and volume, the fuel cell 11, when used as a partial power source for a target device, may not deliver sufficient power density to meet the device's needs. Conventional technology typically addresses this issue by adding backup fuel cells, but these are expensive and occupy a large space.

[0067] In this embodiment, by adding a lithium battery module 21, when the fuel cell's power supply capacity is in surplus, the fuel cell charges the lithium battery module 21, and when the fuel cell's power supply capacity is insufficient, the lithium battery module 21 is used to supplement the power supply to ensure that the target device can operate at a high power density.

[0068] In some embodiments, the apparatus further comprises a communication module;

[0069] The communication module is connected to the controller 14;

[0070] The communication module is used to receive the dispatching instructions issued by the power system dispatching center and send them to the controller 14;

[0071] The controller 14 is used to control the fuel cell 11 to supply power to the target device according to the power supply load indicated by the scheduling instruction.

[0072] In some embodiments, the device further comprises a loss calculation module; the loss calculation module is connected to the communication module;

[0073] The loss calculation module is used to calculate the fuel loss of the fuel cell 11 and report it to the power system dispatching center through the communication module.

[0074] For fuel cells, fuel loss is an important factor affecting their cost. In this embodiment, by using the loss calculation module to monitor fuel loss in real time, unnecessary fuel loss can be saved to a certain extent, reducing operating costs.

[0075] Figure 3 FIG. 1 is a structural diagram of a device 1 based on a fuel cell system power generation technology according to another embodiment of the present invention. Figure 3 As shown, in some embodiments, the fuel cell 11 is a hydrogen fuel cell. The device also includes a wind-solar-grid interface circuit 31;

[0076] The wind-solar grid interface circuit 31 is used to store energy in the hydrogen fuel cell by electrolyzing water through a wind power grid or a photovoltaic power grid.

[0077] In existing technologies, the instability and intermittent nature of wind and photovoltaic power generation often impacts the stability of the power system when they are integrated into it. In this embodiment, hydrogen fuel cells are used to indirectly integrate wind or photovoltaic power generation into the power system, providing power to target devices. Due to the stability and continuity of fuel cell power generation, the impact on the power system is minimal.

[0078] In some embodiments, the device further includes a display module; the display module is connected to the controller 14; the display module is used to display the working status information of the fuel cell 11.

[0079] Figure 4 This is a flowchart of the method for implementing the fuel cell system power generation technology provided by the embodiment of the present invention. Figure 4 As shown, in some embodiments, the method based on fuel cell system power generation technology includes

[0080] S401, obtaining the power supply load of the fuel cell predicted by the load prediction module based on the historical load data of the fuel cell and a pre-established prediction model;

[0081] S402, controlling the fuel cell to supply power to the target device according to the predicted power supply load;

[0082] S403, adjusting the power supply load of the fuel cell through the controller according to the actual load of the target device detected by the detection module;

[0083] S404: Modify the pre-established prediction model according to the actual load.

[0084] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0085] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0086] In the embodiments provided herein, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For example, the division of modules or units is merely a logical functional division. In actual implementation, other division methods may be used, such as multiple units or components being combined or integrated into another system, or some features being ignored or not implemented. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interface, or the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0087] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0088] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0089] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by a computer program to instruct the relevant hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of each of the above-mentioned method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electric carrier signals and telecommunication signals.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A device based on fuel cell system power generation technology, used to supply power to a target device in a power system, characterized in that: include: Fuel cell, load forecasting module, detection module, controller; The fuel cell is connected to the target device; The load prediction module is connected to the fuel cell; The detection module is connected to the target device; the detection module is connected to the load prediction module and the controller respectively; the controller is connected to the fuel cell; The load prediction module is used to predict the power supply load of the fuel cell based on the historical load data of the fuel cell and a pre-established prediction model; The fuel cell is used to supply power to the target device according to the predicted power supply load; The detection module is used to detect the actual load of the target device and send it to the load prediction module and the controller; The controller is used to adjust the power supply load of the fuel cell according to the actual load; The device also includes a stability calculation module; The stability calculation module is used to calculate the power supply stability of the target device according to the predicted power supply load and the power supply parameters of the power system for supplying power to the target device, and send the calculated value to the load prediction module; The device also includes a cost calculation module; The cost calculation module is used to calculate the cost savings corresponding to the historical load data of the fuel cell; wherein the cost savings is equal to the cost required to supply the same load with the power system minus the power supply cost of the fuel cell; The load forecasting module is further configured to determine the weights of stability and economy according to the type of target equipment, and to modify the pre-established forecasting model by multiplying the cost savings and power supply stability by their respective weights.

2. The device based on fuel cell system power generation technology according to claim 1, characterized in that: The device further comprises a lithium battery module; the lithium battery module is connected to the fuel cell and the target device respectively; The lithium battery module is used to receive part of the electric energy output by the fuel cell when the maximum power supply load of the fuel cell is greater than the predicted power supply load; The lithium battery module is further configured to supply power to the target device when the maximum power supply load of the fuel cell is not greater than the predicted power supply load.

3. The device based on fuel cell system power generation technology according to claim 1, characterized in that: The device also includes a communication module; The communication module is connected to the controller; The communication module is used to receive the dispatching instructions issued by the power system dispatching center and send them to the controller; The controller is configured to control the fuel cell to supply power to the target device according to the power supply load indicated by the scheduling instruction.

4. The device based on fuel cell system power generation technology according to claim 3, characterized in that: The device further includes a loss calculation module; the loss calculation module is connected to the communication module; The loss calculation module is used to calculate the fuel loss of the fuel cell and report it to the power system dispatching center through the communication module.

5. The device based on fuel cell system power generation technology according to any one of claims 1 to 4, characterized in that: The fuel cell is a hydrogen fuel cell; the device also includes a wind-solar grid interface circuit; The wind-solar grid interface circuit is used to store energy in the hydrogen fuel cell by electrolyzing water through a wind power grid or a photovoltaic power grid; The device further comprises a display module; the display module is connected to the controller; the display module is used to display the working status information of the fuel cell.

6. A method based on fuel cell system power generation technology, applied to the device based on fuel cell system power generation technology according to any one of claims 1 to 5, characterized in that: include: Obtaining the power supply load of the fuel cell predicted by the load prediction module based on the historical load data of the fuel cell and a pre-established prediction model; controlling the fuel cell to supply power to the target device according to the predicted power supply load; adjusting the power supply load of the fuel cell by the controller according to the actual load of the target device detected by the detection module; The pre-established prediction model is modified according to the actual load.

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