Power control methods, devices, equipment and power generation systems

Abstract

This application relates to a power control method, apparatus, device, and power generation system. The method controls the output power of N energy devices supplying power to a load. The method includes: adjusting the first output voltage of a first energy device according to a first voltage step and a first adjustment direction; adjusting the second output voltage of a second energy device according to a second voltage step and a second adjustment direction, such that the difference between a first increase in the output electrical signal of the first energy device and a first decrease in the output electrical signal of the second energy device is less than a target change threshold; if the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition, then determining the first maximum power point of the first energy device based on the current first output voltage. This method can effectively achieve energy coordination in the power generation system.

Description

Technical Field

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

[0002] A photovoltaic (PV) power generation system typically includes multiple PV panels or at least one PV panel plus energy storage equipment as a DC power source. The power converter in a PV power generation system can employ a voltage source control strategy to convert the PV cell power into AC power to supply power to the load or feed it into the power system.

[0003] To improve power conversion efficiency, photovoltaic power generation systems use MPPT (Maximum Power Point Tracking) technology to control the output power of photovoltaic panels, so that the photovoltaic panels operate at their maximum power point.

[0004] However, in scenarios where photovoltaic power generation systems are used to supply power to loads, the power operating point of the photovoltaic power generation system will be clamped to a fixed point lower than the maximum power point by the load power. As a result, the upper management system of the photovoltaic power generation system cannot determine the maximum output power of the photovoltaic panels and cannot achieve effective system energy coordination. Summary of the Invention

[0005] Therefore, it is necessary to provide a power control method, device, equipment, and power generation system that can achieve effective energy coordination in power generation systems, addressing the aforementioned technical problems.

[0006] In a first aspect, a power control method is provided for controlling the output power of N energy devices that supply power to a load. The method includes:

[0007] The first output voltage of the first energy device is adjusted according to the first voltage step and the first adjustment direction, and the second output voltage of the second energy device is adjusted according to the second voltage step and the second adjustment direction, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than the target change threshold.

[0008] The first adjustment direction indicates a voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction indicates a voltage adjustment direction that decreases the second output electrical signal of the second energy device. The first energy device includes at least one energy device among the N energy devices, and the second energy device includes at least one energy device among the N energy devices other than the first energy device. The output electrical signal includes output power or output current.

[0009] If the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition, then the first maximum power point of the first energy device is determined based on the current first output voltage.

[0010] Secondly, a power control device is provided for controlling the output power of N energy devices that supply power to a load. The device includes:

[0011] An adjustment module is configured to adjust the first output voltage of a first energy device according to a first voltage step and a first adjustment direction, and to adjust the second output voltage of a second energy device according to a second voltage step and a second adjustment direction, such that the difference between a first increase in the output electrical signal of the first energy device and a first decrease in the output electrical signal of the second energy device is less than a target change threshold. The first adjustment direction represents the voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction represents the voltage adjustment direction that decreases the second output electrical signal of the second energy device. The first energy device includes at least one energy device from the N energy devices, and the second energy device includes at least one energy device from the N energy devices other than the first energy device. The output electrical signal includes output power or output current.

[0012] An iterative module is used to determine the first maximum power point of the first energy device based on the current first output voltage if the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition.

[0013] Thirdly, an electronic device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the method as described in the first aspect.

[0014] Fourthly, a power generation system is provided, comprising N power devices and electronic equipment as provided in the third aspect, wherein the N power devices supply power to a load.

[0015] The aforementioned power control method, apparatus, device, and power generation system, wherein the power control method is used to control the output power of N energy devices supplying power to a load, the N energy devices supplying power to the load, the method comprising: adjusting the first output voltage of a first energy device according to a first voltage step and a first adjustment direction, and adjusting the second output voltage of a second energy device according to a second voltage step and a second adjustment direction, such that the difference between a first increase in the output electrical signal of the first energy device and a first decrease in the output electrical signal of the second energy device is less than a target change threshold; the first adjustment direction represents the voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction represents the voltage adjustment direction that decreases the second output electrical signal of the second energy device, the first energy device including the N energy devices. At least one energy device is provided, and the second energy device includes at least one energy device from the N energy devices excluding the first energy device. The output electrical signal includes output power or output current. If the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition, the first maximum power point of the first energy device is determined based on the current first output voltage. In this way, by gradually increasing the output electrical signal of the first energy device and correspondingly gradually decreasing the output electrical signal of the second energy device, the overall output power of the N energy devices is kept in match with the load power during each adjustment iteration. The power operating point of the first energy device can break free from the clamping of the load power and reach the maximum power point. The maximum output power of the first energy device can be obtained in a timely manner, and the energy coordination of the power generation system can be effectively realized. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram illustrating the application environment of the power control method in one embodiment;

[0018] Figure 2 This is a schematic diagram showing the photovoltaic characteristic curve of a photovoltaic power generation module as a function of illumination and the output power of the power converter in one embodiment.

[0019] Figure 3 This is a schematic diagram of an application scenario for a power generation system including two energy sources in one embodiment.

[0020] Figure 4 for Figure 3 The diagram shows the output power of each energy device and the H-bridge converter in the power generation system.

[0021] Figure 5 for Figure 3 The diagram shows how the output power of each energy device in the power generation system is clamped to match the load power.

[0022] Figure 6 A flowchart illustrating a power control method provided in one embodiment;

[0023] Figure 7 This is a schematic diagram illustrating an application scenario of a power generation system in which one energy device is an energy device including an energy storage component;

[0024] Figure 8 This is a schematic diagram illustrating an application scenario of a power generation system in another embodiment, where one energy device is an energy device including an energy storage component;

[0025] Figure 9 This is a schematic diagram illustrating an application scenario of a power generation system in another embodiment, where one energy device is an energy device including an energy storage component;

[0026] Figure 10 This is a schematic diagram of the adjustment process corresponding to step 602 in one embodiment, using a power generation system with a one-to-two architecture as the application scenario.

[0027] Figure 11 This is a flowchart illustrating step 602 in one embodiment;

[0028] Figure 12 A structural block diagram of a power control device provided in one embodiment. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0032] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0033] It is understood that the term "based on" as used in this application is used to describe one or more factors that influence the determination, but does not exclude other factors that may influence the determination. For example, the phrase "determine A based on B" means that the determination of A can be based entirely or at least partially on factor B. That is, B is a factor that influences the determination of A, but does not exclude the fact that the determination of A is also based on C.

[0034] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0035] In one exemplary embodiment, the provided power control method can be applied to, for example, Figure 1 In the illustrated application environment, the power from N energy devices 100 is aggregated by the subsequent power converter 200 to power the load 300, where N is a positive integer greater than 1. In the scenario described in this application embodiment, the N energy devices power the load 300; in other application scenarios, these N energy devices can provide energy to the power grid. Exemplarily, the subsequent power converter 200 can be implemented using an H-bridge converter. In this technical field, the aforementioned architecture of N energy devices + subsequent power converter can be referred to as a one-to-N architecture.

[0036] The energy device 100 includes a power generation component and a corresponding front-end power converter, and may also include an energy storage component and a corresponding front-end power converter. The energy device 100 employs a voltage source control strategy to convert the electrical energy provided by the power generation component or energy storage component into alternating current (AC) to power the load or feed it to the power grid system. For example, the power generation component is a photovoltaic power generation component, and the front-end power converter is a DC-AC converter; another example is a wind power generation component, and the front-end power converter is an AC-AC converter. The front-end power converter refers to the power converter connected to the power generation component in the energy device 100, while the back-end power converter refers to the power converter connected to N energy devices, collecting, converting, and transmitting the energy from the N energy devices 100 to the power grid or load. "Front-end" and "back-end" are used to distinguish the position of the corresponding power converter in a one-to-N architecture and are not intended to limit the circuit topology or functionality of the power converter.

[0037] The energy device 100, which includes power generation components, typically employs MPPT technology to achieve maximum power point tracking of the power generation components. For example, please refer to... Figure 2 Taking photovoltaic (PV) power generation modules as an example, the PV characteristic curve of PV cells undergoes various changes due to changes in the external environment throughout the day, and typically achieves its optimal light curve characteristics around noon; among them, Figure 2 P in pv P represents the output power of the photovoltaic power generation module, V represents the output voltage of the photovoltaic power generation module, and P represents the output voltage of the photovoltaic power generation module. out The output power of the front-end power converter is represented by t, time is represented by MPP, and the maximum power point of the photovoltaic power generation module at the current moment is represented by MPP.

[0038] For example, the MPPT process can be implemented through an algorithm in the controller within the energy device 100. Based on the control of the power electronic equipment, the maximum power point of the photovoltaic power generation module's output voltage is controlled or adjusted, and the corresponding output power of the front-end power converter exhibits the following characteristics: Figure 2 The step-like changes are shown; and, by example, in an energy system with multiple energy devices 100, the MPPT process of each energy device 100 can be implemented by an algorithm in the control device of the energy system.

[0039] For example, please refer to Figure 3To further illustrate the application scenario of this application, a power generation system comprising two energy devices 100 is used to supply power to the load. The energy device 100 includes photovoltaic power generation modules, a DAB (Dual Active Bridge) converter, and an H-bridge converter. The two DAB converters respectively control the power generation of the two photovoltaic power generation modules, and the H-bridge converter realizes the output power (P) of the two preceding DAB converters. out1 and P out2 The summation of ) yields P. outAll and P outAll The power is fed to the load; each energy device has the ability to perform maximum power point tracking (MPPT) for itself, enabling the photovoltaic (PV) modules to output power according to their maximum power point. Ignoring the losses of the DAB converter and H-bridge converter, the entire power generation system exhibits a power balance relationship: the output power P of PV module 1... mppt1 Equal to the output power P of the first DAB converter out1 Photovoltaic cell 2 output power P mppt2 Equal to the output power P of the second DAB converter out2 H-bridge converter output power P outAll equals P out1 +P out2 ;like Figure 3 and 4 As shown.

[0040] exist Figure 3 When the power generation system shown is supplying power to a load, if there is no energy storage component or the energy storage battery is fully charged and loses its power absorption and regulation capability, and the output power of the photovoltaic power generation modules is greater than the load power, or the combined output power of the two photovoltaic power generation modules is greater than the load power, the output power of the photovoltaic power generation modules will be less than their maximum power point due to the need to match the load power. The power operating point of the photovoltaic power generation modules will be clamped by the load power to a fixed point below the maximum power point, such as... Figure 5 As shown. In this case, the controller in the power generation system (exemplary, is...) Figure 3 The MCU (Microcontroller Unit) or the upper-level home energy management system cannot obtain the maximum power output capacity of the photovoltaic power generation modules, and cannot realize load management and cope with sudden load switching.

[0041] This application provides a power control method that can promptly determine the maximum power point of energy equipment through the following embodiments, thereby achieving effective energy coordination.

[0042] Please refer to Figure 6A power control method is provided for controlling the output power of N energy devices, where N energy devices supply power to a load, and N is an integer greater than 1. The method includes steps 602 to 604, wherein:

[0043] Step 602: Adjust the first output voltage of the first energy device according to the first voltage step and the first adjustment direction, and adjust the second output voltage of the second energy device according to the second voltage step and the second adjustment direction, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than the target transformation threshold.

[0044] The first energy device includes at least one of the N energy devices, the second energy device includes at least one of the N energy devices other than the first energy device, and the output electrical signal includes output power or output current.

[0045] For example, the first energy device is the energy device among N energy devices that currently needs to find the maximum power point, that is, the number of energy devices included in the first energy device is 1.

[0046] For example, the first energy device is a multi-channel energy device among N energy devices for which the maximum power point needs to be found, and the power generation components in the multi-channel energy device have the same or approximately the same output power-output voltage curve; for example, the photovoltaic power generation components included in each of the multi-channel energy devices are under the same or approximately the same light environment. In this example, the first energy device includes more than 1 energy channel.

[0047] For example, the second energy device includes one energy device other than the first energy device among N energy devices, that is, the number of energy devices included in the second energy device is 1.

[0048] For example, the second energy device includes multiple energy devices other than the first energy device among the N energy devices, that is, the number of energy devices included in the second energy device is greater than 1.

[0049] In one possible implementation, all N energy devices are energy devices that include power generation components. For example... Figure 3 As shown, the power generation system includes two energy devices, both of which are photovoltaic power generation modules and DAB converters.

[0050] In one possible implementation, some of the N energy devices are energy devices including power generation components, while the remaining energy devices are energy devices including energy storage components. In this implementation, the first energy device is one of the energy devices including power generation components. Please refer to... Figure 7, Figure 8 and Figure 9 The power generation system encompasses two energy sources: one includes photovoltaic power generation modules and a DAB converter, and the other includes energy storage modules; for example... Figure 7 As shown, the energy equipment corresponding to the energy storage module may include a DAB converter, which converts the power provided by the energy storage module into AC power. The AC power output by the energy equipment corresponding to the photovoltaic power generation module is aggregated through an H-bridge converter circuit to supply power to the load or to the grid; for example... Figure 8 As shown, one energy source includes photovoltaic power generation modules and a DC-DC circuit (direct-to-direct-to-constant conversion circuit), while the other includes energy storage modules and a DC-DC circuit. The DC power output from both energy sources is coupled on the DC bus and converted into AC power by a DAB converter to supply power to the load or the power grid. Figure 9 As shown, one energy device includes a photovoltaic power generation module and a DAB converter, and the other energy device includes a photovoltaic power generation module and a DAB converter. The AC power output from the two energy devices is directly coupled on the AC side of the power generation system to supply power to the load or to the power grid.

[0051] Wherein, the first adjustment direction represents the voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction represents the voltage adjustment direction that decreases the second output electrical signal of the second energy device; the first output voltage of the first energy device is adjusted according to the first adjustment direction so that the operating power point of the first energy device is closer to the maximum power point; the second output voltage of the second energy device is adjusted according to the second adjustment direction so that the operating power point of the second energy device is farther away from the maximum power point. In this way, the overall output power of the first energy device and the second energy device can still match the power required by the load.

[0052] The target change threshold refers to the threshold at which the overall output power change of the N-channel energy devices is less than the target change threshold, indicating that the overall output power of the N-channel energy devices is still considered to match the load. Ideally, the first increase and the first decrease should be equal, i.e., the difference between the first increase and the first decrease should be zero. However, in practical applications, it is difficult to achieve an absolute equality between the first increase and the first decrease. Therefore, in this embodiment, a target change threshold is set. If the difference between the first increase and the first decrease is less than the target change threshold, the first increase and the first decrease are considered to be approximately equal, and the overall output power of the N-channel energy devices remains matched with the load.

[0053] In one possible implementation, the target change threshold is determined based on the rated power or maximum power of the load; for example, the target change threshold is five percent of the rated power or maximum power of the load.

[0054] In one possible implementation, the target variation threshold is determined based on engineering experiments and is a small, fixed power value. For example, the target variation threshold is 2W (watts).

[0055] In one possible implementation, if the difference between the first increase value and the first decrease value is greater than or greater than the target change threshold, the first voltage step size and / or the second voltage step size are adjusted to readjust the output voltage of the first energy device and the second energy device, so that the difference between the first increase value and the first decrease value is less than the target change threshold.

[0056] In one possible implementation, if the difference between the first increase and the first decrease is greater than or equal to a target change threshold, a temporary voltage step size is determined based on the relationship between the first increase and the first decrease, and the relationship between the difference and the target change threshold, to adjust the first output voltage of the first energy device or the second output voltage of the second energy device, so that the overall output power of the N energy devices matches the load. For example, if the first increase is greater than the first decrease, the output signal of the second energy device can be reduced again; based on the relationship between the difference and the target change threshold, the size of the temporary voltage step size is determined, and then the second output voltage of the second energy device is adjusted according to the temporary voltage step size and the second adjustment direction.

[0057] Please refer to Figure 10 The adjustment process shown in step 602 of this embodiment is described using a one-to-two power generation system as an example; Figure 10 As shown, the current power points of the first and second energy devices are denoted as point ①. Both current power points ① of the first and second energy devices are to the right of the maximum power point, meaning that the current output voltage of the first and second energy devices is greater than the output voltage corresponding to the maximum power point. Therefore, in... Figure 10 In the example shown, the first adjustment direction is to reduce the first output voltage to increase the output power of the first energy device. Correspondingly, the second adjustment direction is to increase the second output voltage to reduce the output power of the second energy device. The overall output power of the power generation system remains unchanged or the overall change is very small, matching the load power.

[0058] For example, please refer to Figure 10 At time t1, according to the first voltage step size ∆V 11 Adjust the first output voltage of the photovoltaic power generation module in the first energy device. The increase in the output power of the first energy device at this time is denoted as ∆P. 11 That is, the first increment value, according to the second voltage step size ∆V 21Adjusting the second output voltage of the photovoltaic power generation module in the second energy device reduces the output power of the second energy device by denoted as -∆P. 21 That is, the first decreasing value.

[0059] For example, if the current power point of the first energy device and the second energy device is to the left of the maximum power point, then the first adjustment direction is to increase the first output voltage, and the second adjustment direction is to decrease the second output voltage.

[0060] For example, if the current power point of the first energy device is to the left of the maximum power point and the current power point of the second energy device is to the right of the maximum power point, then the first adjustment direction is to increase the first output voltage and the second adjustment direction is to increase the second output voltage.

[0061] For example, if the current power point of the first energy device is to the right of the maximum power point and the current power point of the second energy device is to the left of the maximum power point, then the first adjustment direction is to reduce the first output voltage and the second adjustment direction is to reduce the second output voltage.

[0062] In the above embodiments and examples, the adjustment process corresponding to step 602 is illustrated using output power as an example. In one possible embodiment, the output electrical signal is the output current; the first output voltage of the first energy device is adjusted according to the first voltage step and the first adjustment direction, and the second output voltage of the second energy device is adjusted according to the second voltage step and the second adjustment direction, so that the overall output current of the N-channel energy devices can continue to match the current required by the load.

[0063] Step 604: If the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition, then the first maximum power point of the first energy device is determined based on the current first output voltage.

[0064] The final iteration termination condition for the maximum power point refers to the fact that the output electrical signal of the first energy device at the current moment is less than the output electrical signal of the first energy device at the previous moment. For example, if the output electrical signal is the output power, then the final iteration termination condition for the maximum power point refers to the fact that the output power of the first energy device at the current moment is less than the output power of the first energy device at the previous moment.

[0065] The first adjustment direction of the first energy device is the adjustment direction closest to the maximum power point corresponding to the first energy device. Taking the output electrical signal as the output power as an example, if the output power of the first energy device satisfies P... out1（当前时刻） <P out1（上一时刻）If the output voltage corresponding to the maximum power point of the first energy device is considered to be between the first output voltage at the previous moment and the first output voltage at the current moment, then the maximum power point of the first energy device is determined based on the current first output voltage. In one possible implementation, the power point corresponding to the current first output voltage is determined as the first maximum power point. In another possible implementation, the current first output voltage is backed down by a first voltage step to obtain the first maximum power point.

[0066] In step 604, the term "first" in the first maximum power point is used only to indicate that the maximum power point corresponds to the first energy device.

[0067] In one possible implementation, the provided power control method further includes: if the output electrical signal of the first energy device does not meet the maximum power tracking iteration termination condition, then continue to adjust the first output voltage of the first energy device according to the first voltage step and the first adjustment direction, and adjust the second output voltage of the second energy device according to the second voltage step and the second adjustment direction, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than the target change threshold.

[0068] For example, taking the output electrical signal as the output power, if the output power of the first energy device satisfies P out1（当前时刻） ≥P out1（上一时刻） If the first energy device has not yet reached its maximum power point at the current moment, then step 602 is executed to adjust the output electrical signal of the first energy device and the output electrical signal of the second energy device.

[0069] Please refer to Figure 7 For example, the operating power point of the first energy device and the second energy device is adjusted from point ① to point ②, and the first energy device has not yet reached its maximum power point. Starting from point ②, continue the adjustment process shown in step 602 above, adjusting the operating power points of the first and second energy devices from point ② to point ③. At this point, the first energy device has not yet reached its maximum power point. Starting from point ③, continue the adjustment process shown in step 602 above until the operating power point of the first energy device reaches the maximum power point. or close to the maximum power point .in, Figure 10 ∆V in 12 and ∆V 22 These refer to the first and second voltage step sizes in the iteration process corresponding to point ② as the new starting point, respectively, where ∆V 12 Possibly related to ∆V 11They may be the same, or they may be different; ∆V 22 Possibly related to ∆V 21 They may be the same, or they may be different; correspondingly, ∆P 12 and -∆P 22 These refer to the first increase and the first decrease in the iteration process corresponding to point ② as the new starting point.

[0070] The power control method provided in the above embodiments is used to control the output power of N energy devices, which supply power to a load. The method includes: adjusting the first output voltage of a first energy device according to a first voltage step and a first adjustment direction; and adjusting the second output voltage of a second energy device according to a second voltage step and a second adjustment direction, such that the difference between a first increase in the output electrical signal of the first energy device and a first decrease in the output electrical signal of the second energy device is less than a target change threshold. The first adjustment direction represents the voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction represents the voltage adjustment direction that decreases the second output electrical signal of the second energy device. The first energy device includes at least one of the N energy devices. The equipment, the second energy equipment includes at least one energy equipment from the N energy equipment, excluding the first energy equipment, and the output electrical signal includes output power or output current; if the output electrical signal of the first energy equipment meets the maximum power point tracking iteration termination condition, then the first maximum power point of the first energy equipment is determined based on the current first output voltage; in this way, by gradually increasing the output electrical signal of the first energy equipment and correspondingly gradually decreasing the output electrical signal of the second energy equipment, the overall output power of the N energy equipment is kept in match with the load power in each adjustment iteration, and the power operating point of the first energy equipment can break free from the clamping of the load power and reach the maximum power point, so that the maximum output power of the first energy equipment can be obtained in time, and the energy coordination of the power generation system can be effectively realized.

[0071] In an exemplary embodiment, based on the different power generation characteristic curves corresponding to the power generation components in each energy device, the energy device whose maximum power point needs to be determined among the N energy devices can be determined as the first energy device in turn, and at least one of the remaining energy devices can be determined as the second energy device, and the maximum power point of the required energy device can be determined according to the power control method described above.

[0072] In one exemplary embodiment, please refer to Figure 11The provided power control method involves adjusting the first output voltage of a first energy device according to a first voltage step and a first adjustment direction, and adjusting the second output voltage of a second energy device according to a second voltage step and a second adjustment direction, such that the difference between a first increase in the output electrical signal of the first energy device and a first decrease in the output electrical signal of the second energy device is less than a target change threshold. For example... Figure 11 As shown, the process includes steps 1102 to 1106, wherein:

[0073] Step 1102: Adjust the first output voltage of the first energy device according to the first voltage step size and the first adjustment direction to obtain the first increase value.

[0074] For example, when the output electrical signal is the output power, the first increase is denoted as ∆P. 11 .

[0075] Step 1104: Adjust the second output voltage of the second energy device according to the second voltage step size and the second adjustment direction to obtain the first decrease value.

[0076] For example, taking the output electrical signal as the output power, the first decrease is denoted as ∆P. 21 .

[0077] Step 1106: If the difference between the first increase value and the first decrease value is greater than or equal to the target change threshold, then adjust at least one of the first voltage step size and the second voltage step size, reset the first output voltage of the first energy device and the second output voltage of the second energy device; repeat the steps of adjusting the first output voltage of the first energy device according to the first voltage step size and the first adjustment direction to obtain the first increase value, and adjusting the second output voltage of the second energy device according to the second voltage step size and the second adjustment direction to obtain the first decrease value, until the difference between the first increase value and the first decrease value is less than the target change threshold.

[0078] For example, taking the output electrical signal as the output power, the target change threshold is denoted as ∆P. thres If |∆P 21 -∆P 11 |<∆P thres If |∆P 21 -∆P 11 |≥∆P thresIf the current adjustment process is deemed not to match the load demand power, the first output voltage of the first energy device and the second output voltage of the second energy device are reset to ensure that the overall output power of the N energy devices can match the load demand power. At the same time, at least one of the first voltage step size and the second voltage step size is adjusted so that the difference between the first increase value and the first decrease value obtained after adjusting the first energy device and the second energy device based on the adjusted first voltage step size and the second voltage step size is less than the target threshold.

[0079] In one possible implementation, the initial values ​​of the first voltage step and the second voltage step are fixed, and the specific values ​​can be determined according to the hardware parameters of the power generation component. For example, the initial values ​​of the first voltage step and the second voltage step are 1V. This application does not specifically limit the initial values ​​of the first voltage step and the second voltage step.

[0080] In one possible implementation, adjusting at least one of the first voltage step size and the second voltage step size includes: increasing the second voltage step size when the first increase value is greater than the first decrease value; and decreasing the second voltage step size when the first increase value is less than the first decrease value.

[0081] Where the first increase value is greater than the first decrease value, it indicates that it is necessary to reduce the power ramp-up of the first energy device and / or increase the power reduction of the second energy device to ensure that the overall output power of the N energy devices can match the load power. This embodiment increases the power reduction of the second energy device by increasing the second voltage step size.

[0082] Where the first increase is less than the first decrease, it indicates that the power ramp-up of the first energy device needs to be increased and / or the power reduction of the second energy device needs to be decreased to ensure that the overall output power of the N energy devices can match the load power. In this embodiment, the power reduction of the second energy device is reduced by decreasing the second voltage step size.

[0083] In one possible implementation, the process of increasing the second voltage step size may include: adding a preset scaling step size to the second voltage step size to obtain an increased second voltage step size; or multiplying the second voltage step size by a preset scaling factor to obtain an increased second voltage step size.

[0084] In one possible implementation, the second voltage step size can be denoted as ∆V. 21 The preset scaling step size can be denoted as x; the increased second voltage step size obtained by adding the preset scaling step size to the second voltage step size can be expressed as ∆V. 21 =∆V 21+x; For example, the initial value of the second voltage step is 1V, the preset scaling step is 0.1V, if the first increase value is greater than the first decrease value, the second voltage step is updated to 1.1V, the first output voltage of the first energy device and the second output voltage of the second energy device are reset, the first output voltage of the first energy device is adjusted according to 1V and the first adjustment direction, and the second output voltage of the second energy device is adjusted according to 1.1V and the second adjustment direction; if the first increase value after re-executing steps 802 and 804 is still greater than the first decrease value, the second voltage step is updated to 1.1V + 0.1V = 1.2V.

[0085] If the first increase value is less than the first decrease value, the second voltage step size is updated to 0.9V, the first output voltage of the first energy device and the second output voltage of the second energy device are reset, the first output voltage of the first energy device is adjusted according to 1V and the first adjustment direction, and the second output voltage of the second energy device is adjusted according to 0.9V and the second adjustment direction; if the first increase value is still less than the first decrease value after re-executing steps 802 and 804, the second voltage step size is updated to 0.9V-0.1V=0.8V.

[0086] In one possible implementation, the second voltage step size can be denoted as ∆V. 21 The preset amplification factor can be denoted as k; multiplying the second voltage step size by the preset amplification factor to obtain the amplified second voltage step size can be expressed as ∆V. 21 =∆V 21 *k; For example, the initial value of the second voltage step is 1V, and the preset increase factor is 1.1. If the first increase value is greater than the first decrease value, the second voltage step is updated to 1.1V, the first output voltage of the first energy device and the second output voltage of the second energy device are reset, the first output voltage of the first energy device is adjusted according to 1V and the first adjustment direction, and the second output voltage of the second energy device is adjusted according to 1.1V and the second adjustment direction. If the first increase value is still greater than the first decrease value after re-executing steps 802 and 804, the second voltage step is updated to 1.1V*1.1=1.21V.

[0087] Correspondingly, if the first increase value is less than the first decrease value, the second voltage step size is multiplied by a preset decrease coefficient to obtain the reduced second voltage step size. For example, the initial value of the second voltage step size is 1V, and the preset decrease coefficient is 0.9. If the first increase value is less than the first decrease value, the second voltage step size is updated to 1V*0.9=0.9V. The first output voltage of the first energy device and the second output voltage of the second energy device are reset. The first output voltage of the first energy device is adjusted according to 1V and the first adjustment direction, and the second output voltage of the second energy device is adjusted according to 0.9V and the second adjustment direction. If the first increase value is still less than the first decrease value after re-executing steps 802 and 804, the second voltage step size is updated to 0.9V*0.9=0.81V.

[0088] In one possible implementation, the preset increase factor and the preset decrease factor are fixed values ​​determined based on the second voltage step size; or they are preset fixed values ​​determined empirically.

[0089] In one possible implementation, preset increase and decrease coefficients can be determined by closed-loop control of the difference between the first increase and the first decrease; for example, k = PI * (∆P 11 -∆P 21 ), where PI refers to proportional-integral controller; a P controller or an I controller can also be used alone.

[0090] In the above embodiments, when the difference between the first increase value and the first decrease value is greater than or equal to the target change threshold, the second voltage step size corresponding to the second energy device is adjusted so that the first increase value and the first decrease value are less than the target change threshold. This achieves the matching of the overall output power of the N energy devices with the load demand power. Keeping the first voltage step size of the first energy device unchanged allows the first energy device to track the maximum power point with a stable voltage step size. This avoids the first maximum power point being inaccurate due to an excessively large first voltage step size, or the overall maximum power tracking process being inefficient due to an excessively small first voltage step size. The above embodiments can ensure the accuracy and efficiency of obtaining the first maximum power point.

[0091] In another possible implementation, if the first increase value is greater than the first decrease value, the first voltage step size is decreased; if the first increase value is greater than the first decrease value, the first voltage step size is increased.

[0092] In another possible implementation, if the first increase value is greater than the second decrease value, the first voltage step size is decreased and the second voltage step size is increased; if the first increase value is greater than the first decrease value, the first voltage step size is increased and the second voltage step size is decreased.

[0093] In an exemplary embodiment, the second energy device includes multiple energy devices other than the first energy device among N energy devices. The power control method provided in this embodiment, which adjusts the first output voltage of the first energy device according to a first voltage step and a first adjustment direction, and adjusts the second output voltage of the second energy device according to a second voltage step and a second adjustment direction, such that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a target change threshold, may include: adjusting the first output voltage of the first energy device according to the first voltage step and the first adjustment direction, and adjusting the output voltage of each energy device included in the second energy device according to the second voltage step, the second adjustment direction, and a preset weight, such that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a change threshold.

[0094] For example, the second energy device includes M energy devices from N energy devices, excluding the first energy device, with preset weights of (W1, W2, ..., W...). M ), where W1+W2+…+W M =1; the m-th energy equipment in the second energy equipment is respectively configured according to W m *∆V 21 The second adjustment direction adjusts the second output voltage of each.

[0095] In an exemplary embodiment, the provided power control method further includes, before the steps of adjusting the first output voltage of the first energy device according to a first voltage step and a first adjustment direction, and adjusting the second output voltage of the second energy device according to a second voltage step and a second adjustment direction, such that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a target change threshold, detecting whether a control trigger condition has been acquired.

[0096] In one possible implementation, the control triggering condition includes: predicting that a new load needs to be connected to the power generation system.

[0097] The power generation system is equipped with a load prediction module. When the load prediction module predicts that a new load needs to be connected to the power generation system, it performs maximum power point tracking on the first energy device among the N energy devices to determine the maximum output power of the first energy device and improve the efficiency of system energy coordination.

[0098] For example, when it is predicted that a new load needs to be connected to the power generation system, the energy device with the largest current output power is first selected as the primary energy device for maximum power point tracking (MPPT). Then, the energy device with the second largest output power is selected as the primary energy device for MPPT in turn, thus determining the maximum power point of each of the N energy devices that can be MPPTed. In this example, prioritizing MPPT for the energy device with the largest output power allows its maximum output power to be known in advance, enabling backup power to be prepared.

[0099] For example, when a new load is predicted to need to be connected to the power generation system, the energy device with the lowest current output power is first selected as the primary energy device for maximum power point tracking (MPPT). Then, the energy device with the second lowest output power is selected as the primary energy device for MPPT in turn, thus determining the maximum power point of each of the N energy devices that can be MPPTed. In this example, MPPT is prioritized for the energy device with the lowest output power to ensure a balanced processing of the multiple energy devices as much as possible.

[0100] In one possible implementation, the control triggering conditions include a preset control time and a target control interval.

[0101] For example, the preset control time can be determined based on the type of power generation components in the energy equipment and the corresponding load power demand of the power generation system. For example, the power generation component is a photovoltaic power generation component. For example, the preset control time can be determined according to the sunrise time of each day. For example, the sunrise time can be set as the preset control time, at which time the photovoltaic power generation component is ready to generate power. Or, for example, the sunrise time plus 3 hours can be used as the preset control time, which can be understood as the maximum power point corresponding to multiple energy devices in the power generation system after this time being greater than the load power demand.

[0102] Here, the control interval refers to the switching of the energy device to be tracked according to the target control interval. For example, the power generation system includes two energy devices, both of which need to perform maximum power point tracking; starting from the preset control time, the two energy devices are alternately used as the first energy device for maximum power point tracking according to the target control interval.

[0103] In one possible implementation, the provided power control method also involves a process for determining a target control interval. This process includes: determining a target control interval based on the output power of a target energy device and a target reference power of the target energy device. The target energy device is any one of N energy devices that includes a power generation component, and the target reference power is determined based on the maximum power of the target energy device.

[0104] For example, some of the N energy devices include photovoltaic power generation modules, while the remaining energy devices include energy storage modules. The target energy device is one energy device that includes photovoltaic power generation modules.

[0105] The maximum power of the target energy equipment is generally determined based on its factory specifications and represents the maximum output power that the target energy equipment can achieve. The target reference power is a value that is less than the maximum power of the equipment.

[0106] The relationship between the output power of the target energy device and its target reference power reflects the external environment of the power generation system. For example, if the output power of the target energy device is greater than its target reference power, the actual output of the target energy device can be considered larger, and the external environment may correspond to a steeper output power-output voltage curve. In this case, the target control interval can be reduced, and the frequency of maximum power tracking for each energy device can be increased. Conversely, if the output power of the target energy device is less than its target reference power, the actual output of the target energy device can be considered smaller, and the external environment may correspond to a shallower output power-output voltage curve. In this case, the target control interval can be increased, and the frequency of maximum power tracking for each energy device can be reduced.

[0107] In one possible implementation, the process of determining the target control interval based on the output power of the target energy device and the target reference power of the target energy device includes: obtaining the target reference power based on the maximum power of the target energy device and the switching coefficient; determining the first control interval as the target control interval if the output power of the target energy device is greater than the target reference power; determining the second control interval as the target control interval if the output power of the target energy device is less than or equal to the target reference power; and the first control interval is less than the second control interval.

[0108] The switching coefficient is greater than 0 and less than 1.

[0109] For example, the default control interval is 1 minute. When the output power of the target energy device is less than the target reference power of the target energy device, the control interval is set to 5 minutes. When the output power of the target energy device is greater than the target reference power of the target energy device, the control interval is set to 1 second.

[0110] For example, the control interval is determined based on the power difference between the output power of the target energy device and the target reference power. For instance, the control interval is adjusted in stages based on the power difference.

[0111] In the above embodiments, the relationship between the output power of the target energy device and the target reference power of the target energy device is used to characterize the current external environment of the target energy device. This serves as the control basis for the target control interval. The frequency of maximum power point tracking of each energy device can be adjusted according to the external environment, thereby improving the flexibility and effectiveness of energy management in the power generation system.

[0112] In one exemplary embodiment, the provided power control method involves a process of determining a target change threshold. In this embodiment, the process includes: determining the target change threshold based on the current power change rate or power change direction of a target energy device, wherein the target energy device is any one of N energy devices that includes a power generation component.

[0113] Here, the current power change rate of the target energy device represents the current power conversion speed of the target energy device, which can represent the rate of change of output power corresponding to the adjustment of output voltage by each energy device in the power generation system at the current moment. When the power change rate is fast, a larger value can be used for the target change threshold, and when the power conversion rate is slow, a smaller value can be used for the target change threshold.

[0114] In one possible implementation, the current power change rate of the target energy device can be determined by applying a disturbance to the output voltage of the target energy device and based on the change in output power of the target energy device in response to the disturbance.

[0115] In one possible implementation, a perturbation can be applied to the output voltage of the target energy device. Based on the direction of change in the output power of the target energy device in response to the perturbation, it can be determined whether the current operating power point of the target energy device is to the left or right of the maximum power point in the output power-output voltage curve. For example, if decreasing the output voltage of the target energy device by a perturbation value results in an increase in output power, it indicates that the operating power point of the target energy device is to the right of the maximum power point. The corresponding characteristic curve slope is generally larger, and the power change is more rapid. In this case, a larger target conversion threshold can be selected. Conversely, if decreasing the output voltage of the target energy device by a perturbation value results in a decrease in output power, it indicates that the operating power point of the target energy device is to the left of the maximum power point. The corresponding characteristic curve slope is generally smaller, and the power change is slower. In this case, a smaller target conversion threshold can be selected.

[0116] In one possible implementation, the first output voltage of the first energy device is adjusted according to a first voltage step and a first adjustment direction to obtain a first increase in the output electrical signal of the first energy device. Based on the first increase and the first voltage step, the current power change rate of the first energy device is obtained. Based on this output power change rate, a target change threshold is determined. For example, if the power change rate is greater than the change rate threshold, the first change threshold is determined as the target change threshold; if the power change rate is less than the change rate threshold, a second change threshold is determined as the target change threshold, wherein the first change threshold is greater than the second change threshold.

[0117] In this embodiment, during the iterative process of maximum power point tracking of the first energy device, in the first iteration, the first increment value of the first energy device and the first voltage step size are used to determine the target change threshold, and in subsequent iterations, the target change threshold can be kept unchanged.

[0118] In an exemplary embodiment, the provided power control method determines the target change threshold through the following process: when the current output of the target energy device is close to the maximum power point corresponding to the output power-output voltage curve, a third change threshold is determined as the target change threshold; when the current output of the target energy device is far from the maximum power point corresponding to the output power-output voltage curve, a fourth change threshold is determined as the target change threshold, wherein the third change threshold is less than the fourth change threshold.

[0119] In an exemplary embodiment, the provided power control method is used to control the output power of N energy devices, where N energy devices supply power to a load, and N is an integer greater than 1. The method includes steps S2 to S10, wherein:

[0120] Step S2: Detect whether the control trigger condition has been obtained.

[0121] Optionally, the control triggering conditions include: predicting that a new load needs to be connected to the power generation system.

[0122] Optionally, the control trigger conditions include a preset control time and a target control interval.

[0123] Optionally, the method further includes: determining a target control interval based on the output power of the target energy device and the target reference power of the target energy device, wherein the target energy device is any one of the N energy devices that includes a power generation component, and the target reference power is determined based on the maximum power of the target energy device.

[0124] Optionally, the target control interval is determined based on the output power of the target energy device and the target reference power of the target energy device, including: obtaining the target reference power based on the maximum power of the target energy device and the switching coefficient; if the output power of the target energy device is greater than the target reference power, the first control interval is determined as the target control interval; if the output power of the target energy device is less than or equal to the target reference power, the second control interval is determined as the target control interval; the first control interval is less than the second control interval.

[0125] Step S4: Adjust the first output voltage of the first energy device according to the first voltage step size and the first adjustment direction to obtain the first increase value;

[0126] Step S6: Adjust the second output voltage of the second energy device according to the second voltage step size and the second adjustment direction to obtain the first decrease value.

[0127] Optionally, the second energy device includes multiple energy devices other than the first energy device among the N energy devices; the process of adjusting the second output voltage of the second energy device according to the second voltage step and the second adjustment direction to obtain the first decrease value includes: adjusting the output voltage of each energy device included in the second energy device according to the second voltage step, the second adjustment direction and the preset weight to obtain the second decrease value corresponding to the overall output electrical signal of the multiple energy devices included in the second energy device.

[0128] Step S8: If the difference between the first increase value and the first decrease value is greater than or equal to the target change threshold, then adjust at least one of the first voltage step size and the second voltage step size, reset the first output voltage of the first energy device and the second output voltage of the second energy device; repeat steps S4 and S6 until the difference between the first increase value and the first decrease value is less than the target change threshold.

[0129] Optionally, adjusting at least one of the first voltage step size and the second voltage step size includes: increasing the second voltage step size when the first increase value is greater than the first decrease value; and decreasing the second voltage step size when the first increase value is less than the first decrease value.

[0130] Optionally, increasing the second voltage step size includes: adding a preset scaling step size to the second voltage step size to obtain an increased second voltage step size; or multiplying the second voltage step size by a preset scaling factor to obtain an increased second voltage step size.

[0131] Step S10: If the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition, then the first maximum power point of the first energy device is determined based on the current first output voltage.

[0132] If the output electrical signal of the first energy device does not meet the maximum power tracking iteration termination condition, then steps S2 to S8 continue to be executed.

[0133] Optionally, a target change threshold is determined based on the current power change rate or power change direction of the target energy device, where the target energy device is any one of the N energy devices that includes a power generation component.

[0134] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0135] It is understood that the term "based on" as used in this application is used to describe one or more factors that influence the determination, but does not exclude other factors that may influence the determination. For example, the phrase "determine A based on B" means that the determination of A can be based entirely or at least partially on factor B. That is, B is a factor that influences the determination of A, but does not exclude the fact that the determination of A is also based on C.

[0136] Based on the same inventive concept, this application also provides a power control device for implementing the power control method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more power control device embodiments provided below can be found in the limitations of the power control method described above, and will not be repeated here.

[0137] In one exemplary embodiment, such as Figure 12 As shown, a power control device is provided, including: an adjustment module 1202 and an iteration module 1204, wherein:

[0138] The adjustment module 1202 is used to adjust the first output voltage of the first energy device according to a first voltage step and a first adjustment direction, and to adjust the second output voltage of the second energy device according to a second voltage step and a second adjustment direction, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a target change threshold. The first adjustment direction represents the voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction represents the voltage adjustment direction that decreases the second output electrical signal of the second energy device. The first energy device includes at least one energy device among N energy devices, and the second energy device includes at least one energy device among N energy devices other than the first energy device. The output electrical signal includes output power or output current.

[0139] The iteration module 1204 is used to determine the first maximum power point of the first energy device based on the current first output voltage if the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition.

[0140] In an exemplary embodiment, if the output electrical signal of the first energy device does not meet the maximum power tracking iteration termination condition, the adjustment module 1202 is used to continue to adjust the first output voltage of the first energy device according to the first voltage step and the first adjustment direction, and adjust the second output voltage of the second energy device according to the second voltage step and the second adjustment direction, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than the target change threshold.

[0141] In an exemplary embodiment, the adjustment module 1202 is configured to adjust the first output voltage of the first energy device according to a first voltage step and a first adjustment direction to obtain a first increase value; adjust the second output voltage of the second energy device according to a second voltage step and a second adjustment direction to obtain a first decrease value; if the difference between the first increase value and the first decrease value is greater than or equal to a target change threshold, adjust at least one of the first voltage step and the second voltage step to reset the first output voltage of the first energy device and the second output voltage of the second energy device; re-execute the steps of adjusting the first output voltage of the first energy device according to the first voltage step and the first adjustment direction to obtain the first increase value, and adjusting the second output voltage of the second energy device according to the second voltage step and the second adjustment direction to obtain the first decrease value, until the difference between the first increase value and the first decrease value is less than the target change threshold.

[0142] In an exemplary embodiment, the adjustment module 1202 is configured to increase the second voltage step size when the first increase value is greater than the first decrease value, and decrease the second voltage step size when the first increase value is less than the first decrease value.

[0143] In an exemplary embodiment, the adjustment module 1202 is used to add a preset scaling step size to the second voltage step size to obtain an increased second voltage step size; or, to multiply the second voltage step size by a preset scaling factor to obtain an increased second voltage step size.

[0144] In an exemplary embodiment, the second energy device includes multiple energy devices other than the first energy device among N energy devices; the adjustment module 1202 is used to adjust the first output voltage of the first energy device according to a first voltage step and a first adjustment direction, and to adjust the output voltage of each energy device included in the second energy device according to a second voltage step, a second adjustment direction and a preset weight, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a change threshold.

[0145] In one exemplary embodiment, the power control device further includes a detection module for detecting whether a control trigger condition has been acquired.

[0146] In one exemplary embodiment, the control triggering condition includes: predicting that a new load needs to be connected to the power generation system.

[0147] In one exemplary embodiment, the control triggering conditions include a preset control time and a target control interval.

[0148] In an exemplary embodiment, the detection module is used to determine the target control interval based on the output power of the target energy device and the target reference power of the target energy device. The target energy device is any one of the N energy devices that includes a power generation component, wherein the target reference power is determined based on the maximum power of the target energy device.

[0149] In an exemplary embodiment, the detection module is configured to obtain a target reference power based on the maximum power of the target energy device and the switching coefficient; if the output power of the target energy device is greater than the target reference power, a first control interval is determined as the target control interval; if the output power of the target energy device is less than or equal to the target reference power, a second control interval is determined as the target control interval; the first control interval is less than the second control interval.

[0150] In an exemplary embodiment, the adjustment module 1202 is used to determine a target change threshold based on the current power change rate or power change direction of the target energy device, wherein the target energy device is any one of the N energy devices that includes a power generation component.

[0151] Each module in the aforementioned power control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0152] In one embodiment, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0153] In one embodiment, a power generation system is also provided, including N power devices and the electronic equipment provided in the above embodiments, wherein the N power devices supply power to the load.

[0154] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0155] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0156] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A power control method, characterized in that, The method is used to control the output power of N energy devices, which supply power to a load. The method includes: The first output voltage of the first energy device is adjusted according to the first voltage step and the first adjustment direction, and the second output voltage of the second energy device is adjusted according to the second voltage step and the second adjustment direction, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than the target change threshold. The first adjustment direction indicates a voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction indicates a voltage adjustment direction that decreases the second output electrical signal of the second energy device. The first energy device includes at least one energy device among the N energy devices, and the second energy device includes at least one energy device among the N energy devices other than the first energy device. The output electrical signal includes output power or output current. If the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition, then the first maximum power point of the first energy device is determined based on the current first output voltage.

2. The method according to claim 1, characterized in that, The method further includes: If the output electrical signal of the first energy device does not meet the maximum power tracking iteration termination condition, then the adjustment of the first output voltage of the first energy device according to the first voltage step size and the first adjustment direction, and the adjustment of the second output voltage of the second energy device according to the second voltage step size and the second adjustment direction, are continued, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than the target change threshold.

3. The method according to claim 1, characterized in that, The adjustment of the first output voltage of the first energy device according to a first voltage step and a first adjustment direction, and the adjustment of the second output voltage of the second energy device according to a second voltage step and a second adjustment direction, such that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a target change threshold, includes: The first output voltage of the first energy device is adjusted according to the first voltage step size and the first adjustment direction to obtain the first increase value; The second output voltage of the second energy device is adjusted according to the second voltage step size and the second adjustment direction to obtain the first decrease value; If the difference between the first increase value and the first decrease value is greater than or equal to the target change threshold, then at least one of the first voltage step size and the second voltage step size is adjusted, and the first output voltage of the first energy device and the second output voltage of the second energy device are reset. The steps of adjusting the first output voltage of the first energy device according to the first voltage step and the first adjustment direction to obtain the first increase value, and adjusting the second output voltage of the second energy device according to the second voltage step and the second adjustment direction to obtain the first decrease value are repeated until the difference between the first increase value and the first decrease value is less than the target change threshold.

4. The method according to claim 3, characterized in that, Adjusting at least one of the first voltage step size and the second voltage step size includes: If the first increase value is greater than the first decrease value, increase the second voltage step size; If the first increase is less than the first decrease, the second voltage step size is reduced.

5. The method according to claim 4, characterized in that, Increasing the second voltage step size includes: Add a preset scaling step size to the second voltage step size to obtain the enlarged second voltage step size; or, Multiply the second voltage step size by a preset amplification factor to obtain the amplified second voltage step size.

6. The method according to claim 1, characterized in that, The second energy device includes multiple energy devices other than the first energy device among the N energy devices; The adjustment of the first output voltage of the first energy device according to a first voltage step and a first adjustment direction, and the adjustment of the second output voltage of the second energy device according to a second voltage step and a second adjustment direction, such that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a target change threshold, includes: The first output voltage of the first energy device is adjusted according to the first voltage step size and the first adjustment direction, and the output voltage of each energy device included in the second energy device is adjusted according to the second voltage step size, the second adjustment direction and the preset weight, so that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than the change threshold.

7. The method according to claim 1, characterized in that, Before the step of adjusting the first output voltage of the first energy device according to a first voltage step and a first adjustment direction, and adjusting the second output voltage of the second energy device according to a second voltage step and a second adjustment direction, such that the difference between the first increase value of the output electrical signal of the first energy device and the first decrease value of the output electrical signal of the second energy device is less than a target change threshold, the method further includes: Check whether the control trigger condition has been obtained.

8. The method according to claim 7, characterized in that, The control triggering conditions include: predicting that a new load needs to be connected to the power generation system.

9. The method according to claim 7, characterized in that, The control triggering conditions include a preset control time and a target control interval.

10. The method according to claim 9, characterized in that, The method further includes: The target control interval is determined based on the output power of the target energy device and the target reference power of the target energy device. The target energy device is any one of the N energy devices that includes a power generation component. The target reference power is determined based on the maximum power of the target energy device.

11. The method according to claim 10, characterized in that, Determining the target control interval based on the output power of the target energy device and the target reference power of the target energy device includes: The target reference power is obtained based on the maximum power and switching coefficient of the target energy equipment; If the output power of the target energy device is greater than the target reference power, the first control interval is determined as the target control interval; If the output power of the target energy device is less than or equal to the target reference power, the second control interval is determined as the target control interval; The first control interval is smaller than the second control interval.

12. The method according to claim 1, characterized in that, The method further includes: The target change threshold is determined based on the current power change rate or power change direction of the target energy device, wherein the target energy device is any one of the N energy devices that includes a power generation component.

13. A power control device, characterized in that, The device is used to control the output power of N energy devices, which supply power to a load. The device includes: An adjustment module is configured to adjust the first output voltage of a first energy device according to a first voltage step and a first adjustment direction, and to adjust the second output voltage of a second energy device according to a second voltage step and a second adjustment direction, such that the difference between a first increase in the output electrical signal of the first energy device and a first decrease in the output electrical signal of the second energy device is less than a target change threshold. The first adjustment direction represents the voltage adjustment direction that increases the first output electrical signal of the first energy device, and the second adjustment direction represents the voltage adjustment direction that decreases the second output electrical signal of the second energy device. The first energy device includes at least one energy device from the N energy devices, and the second energy device includes at least one energy device from the N energy devices other than the first energy device. The output electrical signal includes output power or output current. An iterative module is used to determine the first maximum power point of the first energy device based on the current first output voltage if the output electrical signal of the first energy device satisfies the maximum power point tracking iteration termination condition.

14. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method according to any one of claims 1 to 12.

15. A power generation system, characterized in that, The power generation system includes N power supply devices and the electronic equipment as described in claim 14, wherein the N power supply devices supply power to the load.

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