A voltage control method, device and electronic equipment

Abstract

The application discloses a voltage control method and device and electronic equipment. The method comprises the following steps: for a plurality of components, determining a corresponding relationship of each component based on an MPPT circuit connected to an output end of each component; determining a maximum value of overall output power when output voltages of each component are consistent based on the corresponding relationship of each component; determining an output voltage corresponding to the maximum value of overall output power as a target voltage, and controlling the output voltage of the MPPT circuit of the plurality of components to be the target voltage. Through the technical scheme provided in the embodiment of the application, the problem that the MPPT adjustment range of a solar system composed of the plurality of components is limited, and the solar system cannot output the maximum output power that can be provided by the corresponding area is avoided.

Description

Technical Field

[0001] This application relates to the field of photovoltaic power generation technology, and in particular to a voltage control method, device and electronic equipment. Background Technology

[0002] The application of vehicle-mounted solar panels in automobiles is limited due to their small usable area and low power generation efficiency. Therefore, existing technologies install different solar panels in different locations within the vehicle and connect them in parallel to address these issues.

[0003] However, when installing various solar panels in different locations on a vehicle, issues such as available area and partial shading can easily lead to inconsistent output voltages among the individual solar panels. This inconsistency in output voltage clamps the overall output voltage of the parallel-connected solar panels to the minimum possible output voltage. Consequently, solar panels with voltages higher than this minimum cannot reach their maximum output power, resulting in the solar system's output power falling short of the maximum value under current sunlight conditions.

[0004] Therefore, existing technologies design multiple solar modules to have the same output voltage before connecting them in parallel to ensure that the output voltages of different solar modules are consistent. Specifically, when designing multiple solar modules to have the same output voltage, existing technologies may employ methods such as... Figure 1a As shown, in the design of solar modules, the arrangement of different chips within the solar module ensures that the output voltage of each solar module is consistent. Then, existing technology, based on this arrangement, arranges the different chips within the solar module, connects the various solar modules in parallel, and then modulates the output voltage of multiple solar modules using a Maximum Power Point Tracking (MPPT) circuit in the output topology to power the entire vehicle.

[0005] However, in this approach, some solar panels may reduce their output power to maintain a consistent output voltage, resulting in lower utilization of available area for these panels. Consequently, the output power of the solar system composed of multiple solar panels may not reach the maximum value under the current sunlight conditions. Furthermore, since vehicle power supplies are regulated by batteries (such as storage batteries or power batteries), and the operating voltage range of vehicle electrical appliances is limited, the adjustable range of the MPPT circuit of the solar controller is further restricted, thus preventing the solar system from reaching its maximum output power.

[0006] For example, existing technology arranges the individual chips in a solar panel based on an array design, ensuring that each solar panel outputs 20V. The adjustable range of the MPPT circuit in the output topology is 0-20V. The MPPT circuit determines that the maximum output power of the solar system within the 0-20V range corresponds to an output voltage of 18V. However, the operating voltage range of the vehicle being processed by the output topology is 9-16V. In this case, the adjustable range of the MPPT circuit in the output topology decreases to 9-16V. Therefore, the output voltage corresponding to the maximum output power of the solar system is no longer within the adjustable range of the MPPT circuit, preventing the solar system from achieving its maximum achievable output power.

[0007] Therefore, existing solar energy systems composed of multiple solar modules suffer from limited MPPT circuit adjustment range and are unable to output the maximum power that the corresponding area can provide. Summary of the Invention

[0008] This application provides a voltage control method to address the problem that in solar systems composed of multiple solar modules, the MPPT circuit adjustment range is limited, and the solar system cannot output the maximum power that the corresponding area can provide. The specific implementation scheme is as follows:

[0009] In a first aspect, this application provides a voltage control method, the method comprising:

[0010] For multiple components, based on the maximum power point tracking (MPPT) circuit connected to the output terminal of each component, the corresponding relationship for each component is determined; wherein, the corresponding relationship is the relationship between the output voltage and the output power in the component;

[0011] Based on the correspondence between each component, the maximum value of the overall output power when the output voltages of each component are consistent is determined; wherein, the overall output power is the sum of the output power of each component;

[0012] The output voltage corresponding to the maximum value of the overall output power is determined as the target voltage, and the output voltage of the MPPT circuit of the multiple components is controlled to be the target voltage.

[0013] In the above-described embodiments, an MPPT circuit is connected to the output terminal of each component. Based on this MPPT circuit, the output voltage of each component is adjusted, ensuring that the output voltages of all components are consistent. This avoids the overall output voltage of multiple components connected in parallel being clamped to the lowest output voltage, thus preventing the output power of components with voltages higher than the lowest output voltage from failing to reach their maximum output power. Consequently, it avoids the problem that the output power of the solar system composed of these components cannot reach the maximum value under the current sunlight conditions. Furthermore, by placing the MPPT circuit at the output terminal of each component, the MPPT circuit is decoupled from the final output voltage required by the output topology. This avoids the problem of limited adjustment range of the MPPT circuit caused by the demand voltage limitation on the vehicle's demand side in existing technologies, thus preventing power loss caused by the MPPT circuit's inability to find the maximum output power point. Meanwhile, based on the MPPT circuit, the correspondence between the output voltage and output power of each component is determined. Based on this correspondence, the maximum value of the overall output power is determined. Based on this maximum value, the target voltage is determined, and the output voltage of the MPPT circuit of multiple components is controlled to be the target voltage, so that the overall output power can reach the maximum value. That is, the output power of the solar system composed of these multiple components can reach the maximum value, thereby avoiding the problem that the solar system cannot output the maximum output power that the corresponding area can provide.

[0014] In one possible implementation, determining the correspondence between each of the multiple components based on the maximum power point tracking (MPPT) circuit connected to the output of each component includes:

[0015] For each of the plurality of components, the following determination operation is performed:

[0016] The MPPT circuit connected to the output terminal of the target component is turned on, and the MPPT circuit of the non-target component is turned off; wherein, the target component is any one of the plurality of components, and the non-target component is the remaining component of the plurality of components other than the target component;

[0017] Based on the MPPT circuit, multiple output voltages of the target component are determined, and the output power corresponding to each of the multiple output voltages is determined;

[0018] Based on the multiple output voltages and multiple output powers, the correspondence between the target components is determined;

[0019] The process continues until each component has performed the determining operation, thereby obtaining the corresponding relationship for each component.

[0020] In one possible implementation, determining multiple output voltages of the target component based on the MPPT circuit, and determining the output power corresponding to each of the multiple output voltages, includes:

[0021] By adjusting the duty cycle of the switching transistor in the MPPT circuit, the plurality of output voltages of the target component are determined, and the output current corresponding to each of the plurality of output voltages is determined.

[0022] The output power corresponding to each of the plurality of output voltages is determined based on the plurality of output voltages and the output current corresponding to each of the plurality of output voltages.

[0023] In one possible implementation, the correspondence includes a first correspondence and a second correspondence, then determining the correspondence of the target component based on the plurality of output voltages and the plurality of output powers includes:

[0024] Among the plurality of output powers, the maximum output power of the target component is determined, and the output voltage corresponding to the maximum output power among the plurality of output voltages is determined as the maximum output voltage;

[0025] A first output voltage is determined that is at a first preset value interval from the maximum output voltage, and a second output voltage is determined that is at a second preset value interval from the maximum output voltage; and a first output power corresponding to the first output voltage and a second output power corresponding to the second output voltage are determined; wherein, the first output voltage is less than the maximum output voltage, and the second output voltage is greater than the maximum output voltage;

[0026] Based on the first output voltage, the first output power, the maximum output voltage, and the maximum output power, a first correspondence is determined, and based on the second output voltage, the second output power, the maximum output voltage, and the maximum output power, a second correspondence is determined.

[0027] In one possible implementation, determining the maximum value of the overall output power when the output voltages of each component are consistent, based on the correspondence between each component, includes:

[0028] Determine a voltage set; wherein the voltage set contains N distinct output voltages, where N is a positive integer;

[0029] The voltage in the corresponding relationship for each component is sequentially set to each voltage in the voltage set;

[0030] Calculate the overall output power when the voltage in the corresponding relationship is every voltage in the voltage set, and obtain N overall output powers;

[0031] Among the N overall output powers, determine the maximum value of the overall output power.

[0032] In one possible implementation, after the output voltage of the MPPT circuit controlling the plurality of components is the target voltage, the method further includes:

[0033] Obtain the demand voltage from the vehicle demand side;

[0034] The control voltage conversion circuit converts the target voltage into the required voltage and outputs the required voltage.

[0035] Secondly, this application also provides a voltage control device, the device comprising:

[0036] The first determining module is used to determine the correspondence between each component and the maximum power point tracking (MPPT) circuit connected to the output terminal of each component for multiple components; wherein the correspondence is the relationship between the output voltage and the output power of the component.

[0037] The second determining module is used to determine the maximum value of the overall output power when the output voltages of each component are consistent, based on the correspondence between each component; wherein the overall output power is the sum of the output power of each component.

[0038] The processing module is used to determine the output voltage corresponding to the maximum value of the overall output power as the target voltage, and to control the output voltage of the MPPT circuit of the plurality of components to be the target voltage.

[0039] In one possible implementation, the first determining module is specifically configured to perform the following determining operation for each of the plurality of components: controlling the MPPT circuit connected to the output terminal of the target component to be turned on, and the MPPT circuit of the non-target component to be turned off; wherein, the target component is any one of the plurality of components, and the non-target component is the remaining components of the plurality of components other than the target component; determining a plurality of output voltages of the target component based on the MPPT circuit, and determining the output power corresponding to each of the plurality of output voltages; determining the correspondence relationship of the target component based on the plurality of output voltages and the plurality of output power; until the determining operation is performed for each component, and the correspondence relationship corresponding to each component is obtained.

[0040] In one possible implementation, the first determining module is further configured to determine the plurality of output voltages of the target component by adjusting the duty cycle of the switching transistor in the MPPT circuit, and determine the output current corresponding to each of the plurality of output voltages; and determine the output power corresponding to each of the plurality of output voltages based on the plurality of output voltages and the output current corresponding to each of the plurality of output voltages.

[0041] In one possible implementation, the correspondence includes a first correspondence and a second correspondence. The first determining module is further configured to: determine the maximum output power of the target component among the plurality of output powers; determine the output voltage corresponding to the maximum output power among the plurality of output voltages as the maximum output voltage; determine a first output voltage spaced from the maximum output voltage by a first preset value, and a second output voltage spaced from the maximum output voltage by a second preset value; determine a first output power corresponding to the first output voltage, and a second output power corresponding to the second output voltage; wherein the first output voltage is less than the maximum output voltage, and the second output voltage is greater than the maximum output voltage; determine the first correspondence based on the first output voltage, the first output power, the maximum output voltage, and the maximum output power; and determine the second correspondence based on the second output voltage, the second output power, the maximum output voltage, and the maximum output power.

[0042] In one possible implementation, the second determining module is specifically used to determine a voltage set; wherein the voltage set contains N different output voltages, where N is a positive integer; sequentially setting the voltage in the correspondence relationship corresponding to each component to be each voltage in the voltage set; sequentially calculating the overall output power when the voltage in the correspondence relationship is each voltage in the voltage set, obtaining N overall output powers; and determining the maximum value of the overall output power among the N overall output powers.

[0043] In one possible implementation, the processing module is specifically configured to acquire the demand voltage on the vehicle demand side; control the voltage conversion circuit to convert the target voltage into the demand voltage, and output the demand voltage.

[0044] Thirdly, this application provides an electronic device, comprising:

[0045] Memory, used to store computer programs;

[0046] When a processor executes a computer program stored in the memory, it implements the voltage control method steps described above.

[0047] Fourthly, this application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the voltage control method steps described above.

[0048] For the various aspects of the second to fourth aspects mentioned above, and the technical effects that each aspect may achieve, please refer to the above description of the technical effects that can be achieved for the first aspect or the various possible solutions in the first aspect, which will not be repeated here. Attached Figure Description

[0049] Figure 1a A schematic diagram of a solar energy system composed of solar energy modules is provided as an embodiment of this application;

[0050] Figure 1b A schematic diagram of a solar energy system composed of solar energy modules provided in this application embodiment. Figure 2 ;

[0051] Figure 2 A flowchart illustrating a voltage control method provided in an embodiment of this application;

[0052] Figure 3 A schematic diagram of an MPPT circuit provided in an embodiment of this application;

[0053] Figure 4 A schematic diagram of a PV curve provided for an embodiment of this application;

[0054] Figure 5 A schematic diagram illustrating the processing steps of a voltage control method provided in an embodiment of this application;

[0055] Figure 6 A schematic diagram of a voltage control device provided in an embodiment of this application;

[0056] Figure 7 A schematic diagram of an electronic device provided in this application. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The specific operational methods in the method embodiments can also be applied to the device embodiments or system embodiments. It should be noted that in the description of this application, "multiple" is understood as "at least two". "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. A connected to B can represent: A and B directly connected, and A and B connected through C. Furthermore, in the description of this application, terms such as "first" and "second" are used only for distinguishing the purpose of description and should not be construed as indicating or implying relative importance or order.

[0058] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0059] On the one hand, because the output voltages of the various solar panels installed in a vehicle are not identical, directly connecting multiple solar panels with different output voltages in parallel will clamp the overall output voltage of the multiple solar panels to the voltage value corresponding to the lowest output voltage. Therefore, the output power of solar panels with voltages higher than this will be limited. On the other hand, since the vehicle's power supply is regulated by a battery network, and the operating voltage range of the electrical appliances in the vehicle is limited, the adjustment range of the MPPT circuit in the output topology is limited, preventing the solar system from reaching its maximum power. Therefore, the adjustment range of the MPPT circuit in a solar system composed of multiple solar panels is limited, and the solar system cannot output the maximum power that its corresponding area can provide.

[0060] Therefore, this application proposes a voltage control method that can be applied to... Figure 1b The control module in the solar energy control system is shown. First, the MPPT circuit in the output topology of the solar energy system is set at the output terminal of each component. Then, based on the MPPT circuit, the correspondence between the output voltage and output power of each component is determined. Next, based on the corresponding correspondence for each component, the maximum value of the overall output power when the output voltages of all components are consistent is determined. The output voltage of the MPPT circuit of each component is controlled to be the output voltage corresponding to the maximum value of the overall output power, so that the overall output power can be maximized after multiple components are connected in parallel. This avoids the problem of limited adjustment range of MPPT circuit, and at the same time, makes the solar energy system output the maximum power that the corresponding area can provide.

[0061] Reference Figure 2 The diagram shown is a flowchart of a voltage control method provided in an embodiment of this application. The method includes:

[0062] S1, for multiple components, based on the MPPT circuit connected to the output terminal of each component, determine the corresponding relationship of each component.

[0063] The correspondence refers to the relationship between the output voltage and output power of the component. In this embodiment, the component can be a solar module in a solar energy system.

[0064] like Figure 1b As shown, the solar energy system includes solar modules and a solar controller. A first-stage MPPT (Multi-Level Power Presentation Tester) is connected to the output terminal of each solar module; this first-stage MPPT is the MPPT circuit used to ensure consistent output voltage across all solar modules.

[0065] It should be noted that, in this embodiment of the application, "Level 1" in the Level 1 MPPT represents the circuit hierarchy in the solar energy system. Figure 1b In the solar energy system shown, the circuit in the output topology is a two-stage circuit.

[0066] In Figure 1b In the diagram, the dashed line represents the positive power supply wiring harness, and the solid line represents the negative power supply wiring harness. Furthermore, Figure 1b Each component in the circuit is connected to an isolation diode after the MPPT circuit to prevent the components from charging each other due to inconsistent output voltages under different shading conditions.

[0067] The above MPPT circuit is as follows Figure 3 The diagram shows a Buck-Boost circuit topology consisting of a switching transistor Q, an inductor L, a diode D, and an electrolytic capacitor C. This MPPT circuit can both decrease and increase the output voltage, thus achieving the purpose of regulating the output voltage.

[0068] In the above solar energy system, the relationship between the output power and output voltage of the solar module is as follows: Figure 4 The PV curves are shown below. Each solar module has a different PV curve under different illumination conditions, and the variation pattern of the PV curves under different illumination conditions is as follows: Figure 4 As shown in the PV curve, each solar module has a maximum output power and a maximum output power P. max The corresponding maximum output voltage V max .

[0069] It should be noted that, in the embodiments of this application, the maximum output voltage is the output voltage corresponding to the maximum output power, rather than the maximum value among different output voltages.

[0070] Therefore, in this embodiment of the application, the relationship between the output voltage and output power of each component can be determined based on the above PV curve and the MPPT circuit connected to the output terminal of each component.

[0071] Specifically, for each of the multiple components, the following determination operation is performed:

[0072] First, the MPPT circuit connected to the output terminal of the target component is turned on, while the MPPT circuits of non-target components are turned off. The target component is any one of multiple components, and the non-target components are all other components besides the target component. Then, based on the MPPT circuits, multiple output voltages of the target component are determined, and the corresponding output power of each output voltage is determined. Finally, based on the multiple output voltages and multiple output powers, the correspondence between the target component and the target component is determined.

[0073] In one possible implementation, when determining multiple output voltages of a target component based on an MPPT circuit and determining the output power corresponding to each of the multiple output voltages, firstly, the multiple output voltages of the target component are determined by adjusting the duty cycle of the switching transistors in the MPPT circuit, and the corresponding output currents for each of the multiple output voltages are also determined. Then, based on the multiple output voltages and their corresponding output currents, the corresponding output power for each of the multiple output voltages is determined.

[0074] The duty cycle mentioned above is the ratio of the on-time of the switching transistor to the cycle time.

[0075] In this embodiment, when determining multiple output voltages of the target component and their corresponding output currents by adjusting the duty cycle of the switching transistors in the MPPT circuit, the duty cycle of the switching transistors in the MPPT circuit is controlled, and the output voltage corresponding to each change in duty cycle is collected. For example, the corresponding output voltages are collected when the duty cycles are 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, and 100%. Then, based on the voltage-current relationship in the circuit, the output current corresponding to each output voltage is collected. This voltage-current relationship is the voltage-circuit relationship in the prior art and will not be elaborated here. Thus, based on the above method, multiple output voltages of the target component and their corresponding output currents are determined.

[0076] The output voltage corresponding to each change of duty cycle mentioned above is determined based on the following formula:

[0077]

[0078] Where V represents the output voltage; U represents the input voltage; and δ represents the duty cycle.

[0079] The control method for the duty cycle change of the switching transistor in the above MPPT circuit is a prior art control method, and will not be described in detail here.

[0080] Furthermore, it should be noted that in the embodiments of this application, when the output voltage corresponding to each change in duty cycle is collected by controlling the change in duty cycle of the switching transistor in the MPPT circuit, the duty cycle change patterns of different components are consistent. For example, if component A collects the output voltage corresponding to duty cycles of 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, and 100%, then component B should also collect the output voltage corresponding to duty cycles of 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, and 100%.

[0081] In this embodiment, the above-mentioned determination of the output power corresponding to each of the multiple output voltages based on the multiple output voltages and the output currents corresponding to each of the multiple output voltages is based on the calculation formulas between voltage, current and power in the prior art, and will not be repeated here.

[0082] By adjusting the duty cycle of the switching transistors in the MPPT circuit, the multiple output voltages of the target component were determined, and the corresponding output currents of each output voltage were also determined. Based on these multiple output voltages and their corresponding output currents, the corresponding output power of each output voltage was determined, providing output voltage data and output power data for subsequently determining the correspondence between output voltage and output power.

[0083] In one possible implementation, the correspondence between output voltage and output power in the target component may include a first correspondence and a second correspondence. When determining the correspondence of the target component based on multiple output voltages and multiple output powers, firstly, among the multiple output powers, the maximum output power of the target component is determined, and the output voltage corresponding to the maximum output power among the multiple output voltages is determined as the maximum output voltage. Then, a first output voltage spaced at a first preset value from the maximum output voltage and a second output voltage spaced at a second preset value from the maximum output voltage are determined, and a first output power corresponding to the first output voltage and a second output power corresponding to the second output voltage are determined. Then, based on the first output voltage, the first output power, the maximum output voltage, and the maximum output power, a first correspondence is determined, and based on the second output voltage, the second output power, the maximum output voltage, and the maximum output power, a second correspondence is determined.

[0084] The first output voltage is less than the maximum output voltage, and the second output voltage is greater than the maximum output voltage.

[0085] In this embodiment, the first preset value and the second preset value may be the same or different. Furthermore, the first preset value may be the same or different for different components; similarly, the second preset value may be the same or different for different components. In this embodiment, the first and second preset values ​​can be adjusted according to the specific application scenario.

[0086] In one possible implementation, when determining the first correspondence based on the first output voltage, the first output power, the maximum output voltage, and the maximum output power, a first straight line can be fitted based on a first target point formed by the first output voltage and the first output power, and a second target point formed by the maximum output voltage and the maximum output power. A first linear equation for this first straight line is then calculated based on the first and second target points, thereby determining the first linear equation as the first correspondence. Here, the x-coordinate and y-coordinate of the first target point are the first output voltage and the first output power, respectively, and the x-coordinate and y-coordinate of the second target point are the maximum output voltage and the maximum output power, respectively.

[0087] The above method of calculating the equation of the straight line corresponding to the line fitted by the two target points based on their coordinates is the existing method of calculating the equation of the straight line, and will not be elaborated here.

[0088] Similarly, when determining the second correspondence based on the second output voltage, second output power, maximum output voltage, and maximum output power, a second straight line is fitted based on the third target point formed by the second output voltage and second output power, and the second target point formed by the maximum output voltage and maximum output power. The second equation of this second straight line is then calculated based on the second target point and the first target point, thereby determining the second straight line equation as the second correspondence. Here, the x-coordinate and y-coordinate of the third target point are the second output voltage and the second output power, respectively.

[0089] For example, in Figure 4 In the PV curve shown, the first target point corresponding to the first output voltage and the first output power is point B, and the coordinates of point B are (V... max -θ1, P1), where P1 is the first output power, θ1 is the first preset value, V max Maximum output power P max The corresponding output voltage, then V max -θ1 represents the first output voltage; the second target point corresponding to the maximum output voltage and maximum output power is point A, and the coordinates of point A are (V max P max The third target point corresponding to the second output voltage and the second output power is point C, and the coordinates of point C are (V...). max +θ2, P2), where P2 is the second output power and θ2 is the second preset value, then V max +θ2 is the second output voltage.

[0090] Based on the coordinates of two points, the equation of the line formed by those two points can be determined. Therefore, based on the coordinates of point A and point B, the equation of line AB formed by points A and B can be determined; and based on the coordinates of points A and C, the equation of line AC formed by points A and C can be determined. Since the equation of line AB represents the first correspondence and the equation of line AC represents the second correspondence, the correspondence of the target component is the equation of line AB and the equation of line AC. The specific correspondence between the output power and output voltage formed by these equations is as follows:

[0091]

[0092] Where k1 and a1 represent the slope and intercept of the equation of line AB, respectively; k2 and a2 represent the slope and intercept of the equation of line AC, respectively; P represents the output power; and V represents the output voltage.

[0093] Using the above method, based on the first, second, and third target points, the equations for the first and second straight lines were determined, thereby establishing the first and second correspondences. This reduces the computational load when determining the correspondences, and consequently reduces the computational load required to subsequently determine the maximum value of the overall output power of each component. This overall output power is the sum of the output power of multiple components.

[0094] In another possible implementation, when determining a first correspondence based on the first output voltage, first output power, maximum output voltage, and maximum output power, and determining a second correspondence based on the second output voltage, second output power, maximum output voltage, and maximum output power, a machine learning algorithm can be used to fit the first target point formed by the first output voltage and first output power, the second target point formed by the maximum output voltage and maximum output power, and the third target point formed by the second output voltage and second output power to obtain the curve expression corresponding to the fitted curve. This curve expression is then directly determined as the correspondence formed by the first and second correspondences. That is, the curve expression is directly determined as the correspondence of the target component.

[0095] It should be noted that, in the embodiments of this application, when determining the correspondence of the target components, the first correspondence and the second correspondence are optimally determined by the first linear equation and the second linear equation, thereby determining the correspondence of the target components, so as to reduce the amount of calculation required to determine the maximum value of the overall output power of each component.

[0096] Furthermore, after performing the above determination operations on each of the multiple components, the corresponding relationship for each component can be obtained.

[0097] By employing the above method, based on the determination operations performed by each of the multiple components, the correspondence between output voltage and output power for each component is obtained, providing a basis for subsequently determining the maximum value of the overall output power. Furthermore, this determination operation reduces the time and computational load required to determine the correspondence, thereby improving the efficiency of determining the maximum value of the overall output power.

[0098] S2, based on the corresponding relationship of each component, determine the maximum value of the overall output power when the output voltage of each component is consistent.

[0099] After obtaining the corresponding relationship of each component in step S1, multiple components are connected in parallel. Then, based on the multiple corresponding relationships, the overall output power can be determined when the output voltage of each component is consistent after multiple components are connected in parallel, thereby determining the maximum value of the overall output power.

[0100] In one possible implementation, when determining the maximum value of the overall output power when the output voltage of each component is consistent based on multiple correspondences, the maximum value of the overall output power when the output voltage of each component is consistent can be determined by exhaustive search.

[0101] Specifically, the voltage set is first determined. This voltage set contains N distinct output voltages, where N is a positive integer.

[0102] It should be noted that, in the embodiments of this application, the voltage intervals between the voltages in the voltage set can be the same or different. Optimally, in the exhaustive method, the voltage set is {1V, 2V, 3V, ..., (N-1)V, NV}, which reduces the computational load in the exhaustive method.

[0103] Then, the voltage in the corresponding relationship for each component is set to each voltage in the voltage set. Next, the overall output efficiency is calculated when the voltage in the corresponding relationship is each voltage in the voltage set, resulting in N overall output powers. Finally, the maximum overall output power is determined from among the N overall output powers.

[0104] For example, a vehicle is equipped with three solar panels: panel A, panel B, and panel C. The specific relationship between the output power and output voltage of panel A is as follows:

[0105]

[0106] Among them, P A V represents the output power of component A; A V represents the output voltage of component A; A_max This represents the output voltage corresponding to the maximum output power of component A, i.e., the maximum output voltage of component A; k A_1 k A_2 a A_1 a A_2 These represent the slope and intercept of the linear equation in the correspondence of component A.

[0107] The specific relationship between output power and output voltage in component B is as follows:

[0108]

[0109] Among them, P B V represents the output power of component B; B V represents the output voltage of component B. B_max This represents the output voltage corresponding to the maximum output power of component B, i.e., the maximum output voltage of component B; k B_1 kB_2 a B_1 a B_2 These represent the slope and intercept of the linear equation in the correspondence of component B, respectively.

[0110] The specific relationship between output power and output voltage in component C is as follows:

[0111]

[0112] Among them, P C V represents the output power of component C; C V represents the output voltage of component C; C_max This represents the output voltage corresponding to the maximum output power of component C, i.e., the maximum output voltage of component C; k C_1 k C_2 a C_1 a C_2 These represent the slope and intercept of the linear equation in the correspondence of component C, respectively.

[0113] Therefore, the overall output power P total Specifically as follows:

[0114] P total =P A +P B +P C

[0115] Assuming the voltage set is {1V, 2V, 3V, 4V, 5V}, the corresponding V values ​​for component A are... A_max k A_1 k A_2 a A_1 a A_2 The corresponding values ​​are 2, 1, -1, 2, and 6, respectively. The V in the B component's correspondence... B_max k B_1 k B_2 a B_1 a B_2 The corresponding values ​​are 3, 2, -1, 1, and 10, respectively. The V in the C component's correspondence... C_max k C_1 k C_2 a C_1 a C_2 The values ​​are 4, 1, -1, 4, and 12 respectively.

[0116] When the output voltage is 1V, P A For 3W, P B For 3W, P C It is 5W, and the total output power is 11W; when the output voltage is 2V, P A For 4W, P BFor 5W, P C It is 6W, and the overall output power is 15W; when the output voltage is 3V, P A For 3W, P B For 7W, P C It is 7W, and the total output power is 17W; when the output voltage is 4V, P A For 2W, P B For 6W, P C It is 8W, and the total output power is 16W; when the output voltage is 5V, P A For 1W, P B For 5W, P C The initial value is 7W, and the total output power is 13W. Therefore, the maximum total output power is 17W.

[0117] By using the above method, the maximum value of the overall output power when the output voltage of each component is consistent is determined by exhaustive search. This simplifies the calculation process for determining the maximum value of the overall output power, thereby reducing the amount of calculation required and further improving the efficiency of determining the maximum value of the overall output power.

[0118] In one possible implementation, when determining the maximum overall output power when the output voltages of each component are consistent based on multiple correspondences, the maximum overall output power can be determined using a derivative method or a machine learning method. In this embodiment, the method for determining the maximum overall output power when the output voltages of each component are consistent is not limited. However, preferably, an exhaustive method is used to determine the maximum overall output power when the output voltages of each component are consistent.

[0119] S3, determine the output voltage corresponding to the maximum value of the overall output power as the target voltage, and control the output voltage of the MPPT circuit of multiple components to be the target voltage.

[0120] After determining the maximum value of the overall output power when the output voltage of each component is consistent in step S2, the output voltage corresponding to the maximum value of the overall output power is determined as the target voltage, and the output voltage of the MPPT circuit of multiple components is controlled to be the target voltage.

[0121] In one possible implementation, after the output voltage of the MPPT circuit controlling multiple components is the target voltage, the demand voltage of the vehicle demand side (such as electrical appliances) is first obtained; then the voltage conversion circuit is controlled to convert the target voltage into the demand voltage and output the demand voltage to power the vehicle.

[0122] The above voltage conversion circuit can be used as Figure 1b The circuit in the output topology is shown. However, it should be noted that... Figure 1b The output topology shown does not include an MPPT circuit.

[0123] In summary, the voltage control method proposed in this application, for multiple components, determines the correspondence between the output voltage and output power of each component based on the MPPT circuit connected to the output terminal of each component. Based on this correspondence, it determines the maximum overall output power when the output voltages of all components are consistent. Therefore, based on this maximum overall output power, a target voltage is determined, and the output voltages of the MPPT circuits of multiple components are controlled to be the target voltage. This method achieves tracking control of the maximum output power of each solar module, avoiding the problem of some solar modules with high output voltages having unadjustable output power or being unable to output power at all, which is caused by directly connecting the solar modules in parallel. This ensures that the output power corresponding to the output voltage of multiple components is the optimal power, thereby maximizing the output power of the solar system composed of these multiple components.

[0124] Furthermore, by placing the MPPT circuit at the output of each component, rather than in the output topology circuit, the output voltage of the MPPT circuit is decoupled from the final output voltage of the output topology. This avoids the problem of limited MPPT function adjustment range caused by the demand voltage limitation of the vehicle side in the prior art, thereby avoiding power loss caused by the MPPT circuit being unable to find the maximum output power point, and also avoiding the change of the final output voltage of the output topology with the MPPT circuit in the prior art, thus avoiding adverse effects on the vehicle power supply.

[0125] Furthermore, the above methods increase the benefits of the solar energy system installed in the vehicle and maximize energy saving and replenishment effects.

[0126] The technical solution of this application will be further explained below with reference to a specific application process.

[0127] like Figure 5 The diagram shows the processing flow of the voltage control method. First, for the multiple solar panels installed on the vehicle, the correspondence between the output voltage and output power of each solar panel is calculated in the correspondence determination module.

[0128] Specifically, in the correspondence determination module, the MPPT circuit connected to the output terminal of one solar panel is turned on, while the MPPT circuits of the remaining solar panels installed on the vehicle are turned off. Then, the duty cycle of the switching transistors in the MPPT circuit is continuously adjusted, and the output voltage and current of the MPPT circuit are collected at each adjustment. The output power corresponding to the output voltage is calculated, thus fitting the correspondence between the solar panels based on multiple output voltages and the output power corresponding to each output voltage. This correspondence is then transmitted to the overall output power calculation module to calculate the overall output power, thereby determining the maximum value of the overall output power.

[0129] In the overall output power calculation module, the correspondence relationship of each of the multiple solar modules transmitted by the correspondence determination module is received. Then, through an exhaustive method, the sum of the output power of the multiple solar modules is calculated when the output voltage in each of the multiple correspondence relationships is different. That is, the overall output power is calculated. The output voltage in each correspondence relationship is consistent in each calculation of the overall output power. Then, the maximum value of the overall output power is determined from the multiple overall output power values. This maximum value of the overall output power is then input to the voltage control module to determine the output voltage of the MPPT circuit.

[0130] In the voltage control module, the output voltage corresponding to the maximum value of the overall output power is determined as the target voltage, and the output voltage of the MPPT circuit of each solar module is controlled to be the target voltage. Next, the required voltage of the electrical appliances in the vehicle is received through the output topology circuit, and the target voltage output by the MPPT circuit is converted into the required voltage through the output topology circuit to supply power to the vehicle.

[0131] In this method, an MPPT circuit is connected to the output terminal of each solar module. Based on this MPPT circuit, the output voltage of each solar module is adjusted to ensure that the output voltages of all solar modules are consistent. Furthermore, the adjustment of the output voltage of each solar module via the MPPT circuit is based on the obtained correspondence between output voltage and output power. After determining the maximum overall output power based on this correspondence, the output voltage of each solar module is adjusted based on the target voltage corresponding to this maximum value. This ensures that the output power of the solar system reaches its maximum when each solar module reaches the target voltage, thus achieving tracking control of the maximum output power of each solar module. This avoids the problem of some solar modules with high output voltages having unadjustable output power or being unable to output power at all, which can occur when directly connecting solar modules in parallel.

[0132] Based on the same inventive concept, this application also provides a voltage control device, such as... Figure 6The diagram shown is a structural schematic of a voltage control device provided in this application. The device includes:

[0133] The first determining module 601 is used to determine the corresponding relationship for each component based on the maximum power point tracking (MPPT) circuit connected to the output terminal of each component, for multiple components; wherein, the corresponding relationship is the relationship between the output voltage and the output power in the component;

[0134] The second determining module 602 is used to determine the maximum value of the overall output power when the output voltage of each component is consistent, based on the corresponding relationship of each component; wherein, the overall output power is the sum of the output power of each component;

[0135] The processing module 603 is used to determine the output voltage corresponding to the maximum value of the overall output power as the target voltage, and to control the output voltage of the MPPT circuit of multiple components to be the target voltage.

[0136] In one possible implementation, the first determining module 601 is specifically configured to perform the following determining operation for each of the plurality of components: control the MPPT circuit connected to the output terminal of the target component to be turned on, and the MPPT circuit of the non-target component to be turned off; wherein, the target component is any one of the plurality of components, and the non-target components are the other components of the plurality of components excluding the target component; based on the MPPT circuit, determine the plurality of output voltages of the target component, and determine the output power corresponding to each of the plurality of output voltages; based on the plurality of output voltages and the plurality of output power, determine the correspondence of the target component; until the determining operation is performed for each component, and the correspondence corresponding to each component is obtained.

[0137] In one possible implementation, the first determining module 601 is further configured to determine multiple output voltages of the target component by adjusting the duty cycle of the switching transistor in the MPPT circuit, and determine the output current corresponding to each of the multiple output voltages; and determine the output power corresponding to each of the multiple output voltages based on the multiple output voltages and the output current corresponding to each of the multiple output voltages.

[0138] In one possible implementation, the correspondence includes a first correspondence and a second correspondence. The first determining module 601 is further configured to: determine the maximum output power of the target component among multiple output powers; determine the output voltage corresponding to the maximum output power among multiple output voltages as the maximum output voltage; determine a first output voltage spaced from the maximum output voltage by a first preset value, and a second output voltage spaced from the maximum output voltage by a second preset value; determine the first output power corresponding to the first output voltage, and the second output power corresponding to the second output voltage; wherein the first output voltage is less than the maximum output voltage, and the second output voltage is greater than the maximum output voltage; determine the first correspondence based on the first output voltage, the first output power, the maximum output voltage, and the maximum output power; and determine the second correspondence based on the second output voltage, the second output power, the maximum output voltage, and the maximum output power.

[0139] In one possible implementation, the second determining module 602 is specifically used to determine a voltage set; wherein the voltage set contains N different output voltages, where N is a positive integer; the voltage in the corresponding relationship of each component is set to be each voltage in the voltage set; the overall output power is calculated sequentially when the voltage in the corresponding relationship is each voltage in the voltage set, resulting in N overall output powers; and the maximum value of the overall output power is determined among the N overall output powers.

[0140] In one possible implementation, the processing module 603 is specifically used to acquire the demand voltage on the vehicle demand side; control the voltage conversion circuit to convert the target voltage into the demand voltage, and output the demand voltage.

[0141] Based on the same inventive concept, this application also provides an electronic device that can realize the function of the aforementioned voltage control device. (Refer to...) Figure 7 The aforementioned electronic devices include:

[0142] At least one processor 701 and a memory 702 connected to at least one processor 701. In this embodiment, the specific connection medium between the processor 701 and the memory 702 is not limited. Figure 7 The example shown is the connection between processor 701 and memory 702 via bus 700. Bus 700 is... Figure 7 The connections between other components are indicated by thick lines and are for illustrative purposes only, not as limiting information. The 700 bus can be divided into address bus, data bus, control bus, etc., for ease of representation. Figure 7 The term is represented by a single thick line, but this does not imply that there is only one bus or one type of bus. Alternatively, the processor 701 can also be called a controller; there is no restriction on the name.

[0143] In this embodiment, memory 702 stores instructions executable by at least one processor 701. By executing the instructions stored in memory 702, at least one processor 701 can perform the voltage control method described above. Processor 701 can implement... Figure 6 The functions of each module in the device shown.

[0144] The processor 701 is the control center of the device. It can connect to various parts of the control device through various interfaces and lines. By running or executing instructions stored in memory 702 and calling data stored in memory 702, the processor can perform various functions and process data, thereby monitoring the device as a whole.

[0145] In one possible design, processor 701 may include one or more processing units. Processor 701 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may also not be integrated into processor 701. In some embodiments, processor 701 and memory 702 may be implemented on the same chip; in some embodiments, they may also be implemented on separate chips.

[0146] The processor 701 can be a general-purpose processor, such as a central processing unit (CPU), digital signal processor, application-specific integrated circuit, field-programmable gate array or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the voltage control method disclosed in the embodiments of this application can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0147] Memory 702, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. Memory 702 may include at least one type of storage medium, such as flash memory, hard disk, multimedia card, card-type memory, random access memory (RAM), static random access memory (SRAM), programmable read-only memory (PROM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic storage, magnetic disk, optical disk, etc. Memory 702 can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures that can be accessed by a computer, but is not limited thereto. In the embodiments of this application, memory 702 can also be a circuit or any other device capable of implementing storage functions for storing program instructions and / or data.

[0148] By designing and programming the processor 701, the code corresponding to the voltage control method described in the foregoing embodiments can be embedded into the chip, enabling the chip to execute the code during operation. Figure 2 The steps of the voltage control method in the illustrated embodiment are as follows. How to design and program the processor 701 is a technique well-known to those skilled in the art and will not be described further here.

[0149] Based on the same inventive concept, embodiments of this application also provide a storage medium storing computer instructions that, when executed on a computer, cause the computer to perform the voltage control method described above.

[0150] In some possible implementations, various aspects of the voltage control method provided in this application may also be implemented as a program product comprising program code that, when the program product is run on a device, causes the control device to perform the steps in the voltage control method according to the various exemplary embodiments of this application described above.

[0151] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0152] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0153] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0154] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0155] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A control method of a voltage, characterized by, include: For multiple components, based on the maximum power point tracking (MPPT) circuit connected to the output terminal of each component, the corresponding relationship for each component is determined; wherein, the corresponding relationship is the relationship between the output voltage and the output power in the component; the corresponding relationship is represented by a piecewise linear equation; By exhaustive enumeration, the overall output power of each component is calculated when the output voltage in the corresponding relationship is different, and the maximum value of multiple overall output powers is determined; wherein, in each calculation of the overall output power, the output voltage in different corresponding relationships is the same, and the overall output power is the sum of the output power of each component; The output voltage corresponding to the maximum value of the overall output power is determined as the target voltage, and the output voltage of the MPPT circuit of the multiple components is controlled to be the target voltage.

2. The method of claim 1, wherein, For multiple components, the method of determining the corresponding relationship for each component based on the maximum power point tracking (MPPT) circuit connected to the output terminal of each component includes: For each of the plurality of components, the following determination operation is performed: The MPPT circuit connected to the output terminal of the target component is turned on, and the MPPT circuit of the non-target component is turned off; wherein, the target component is any one of the plurality of components, and the non-target component is the other components among the plurality of components excluding the target component; Based on the MPPT circuit, multiple output voltages of the target component are determined, and the output power corresponding to each of the multiple output voltages is determined; Based on the multiple output voltages and multiple output powers, the correspondence between the target components is determined; The process continues until each component has performed the determining operation, thereby obtaining the corresponding relationship for each component.

3. The method of claim 2, wherein, The step of determining multiple output voltages of the target component based on the MPPT circuit, and determining the output power corresponding to each of the multiple output voltages, includes: By adjusting the duty cycle of the switching transistor in the MPPT circuit, the plurality of output voltages of the target component are determined, and the output current corresponding to each of the plurality of output voltages is determined. The output power corresponding to each of the plurality of output voltages is determined based on the plurality of output voltages and the output current corresponding to each of the plurality of output voltages.

4. The method of claim 2, wherein, The correspondence includes a first correspondence and a second correspondence. Therefore, determining the correspondence of the target component based on the plurality of output voltages and the plurality of output powers includes: Among the plurality of output powers, the maximum output power of the target component is determined, and the output voltage corresponding to the maximum output power among the plurality of output voltages is determined as the maximum output voltage; A first output voltage is determined that is at a first preset value interval from the maximum output voltage, and a second output voltage is determined that is at a second preset value interval from the maximum output voltage; and a first output power corresponding to the first output voltage and a second output power corresponding to the second output voltage are determined; wherein, the first output voltage is less than the maximum output voltage, and the second output voltage is greater than the maximum output voltage; Based on the first output voltage, the first output power, the maximum output voltage, and the maximum output power, a first correspondence is determined, and based on the second output voltage, the second output power, the maximum output voltage, and the maximum output power, a second correspondence is determined.

5. The method of claim 1, wherein, The method involves exhaustively calculating the overall output power for each component when its output voltage is at different values ​​in the corresponding relationship, thereby determining the maximum value of multiple overall output powers. The output voltage in each corresponding relationship remains consistent during the calculation of the overall output power, including: Determine a voltage set; wherein the voltage set contains N distinct output voltages, where N is a positive integer; The voltage in the corresponding relationship for each component is sequentially set to each voltage in the voltage set; Calculate the overall output power when the voltage in the corresponding relationship is every voltage in the voltage set, and obtain N overall output powers; Among the N overall output powers, determine the maximum value of the overall output power.

6. The method of claim 1, wherein, After the output voltage of the MPPT circuit controlling the plurality of components is the target voltage, the method further includes: Obtain the demand voltage from the vehicle demand side; The control voltage conversion circuit converts the target voltage into the required voltage and outputs the required voltage.

7. A voltage control device, characterized by comprising: include: The first determining module is used to determine the correspondence between each component and the maximum power point tracking (MPPT) circuit connected to the output terminal of each component for multiple components; wherein the correspondence is the relationship between the output voltage and the output power of the component; the correspondence is represented by a piecewise linear equation. The second determining module is used to calculate the overall output power of each component when the output voltage in the corresponding relationship is different, by exhaustive search, and to determine the maximum value of multiple overall output powers; wherein, in each calculation of the overall output power, the output voltage in different corresponding relationships is the same, and the overall output power is the sum of the output power of each component; The processing module is used to determine the output voltage corresponding to the maximum value of the overall output power as the target voltage, and to control the output voltage of the MPPT circuit of the plurality of components to be the target voltage.

8. The apparatus of claim 7, wherein, The second determining module is used to determine a voltage set; wherein the voltage set contains N distinct output voltages, and N is a positive integer; The voltage in the corresponding relationship for each component is sequentially set to each voltage in the voltage set; Calculate the overall output power when the voltage in the corresponding relationship is every voltage in the voltage set, and obtain N overall output powers; Among the N overall output powers, determine the maximum value of the overall output power.

9. An electronic device, comprising: include: Memory, used to store computer programs; A processor, when executing a computer program stored in the memory, implements the method steps of any one of claims 1-6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method described in any one of claims 1-6.

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