CN115951753A

CN115951753A - MPPT method, device, equipment and medium for photovoltaic module

Info

Publication number: CN115951753A
Application number: CN202211667405.1A
Authority: CN
Inventors: 杨汝军; 孙本新
Original assignee: Huizhou Huineng Jingdian Technology Co ltd
Current assignee: Huizhou Huineng Jingdian Technology Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-04-11

Abstract

The embodiment of the invention discloses a photovoltaic module MPPT method, a photovoltaic module MPPT device, photovoltaic module MPPT equipment and a photovoltaic module MPPT medium, wherein the photovoltaic module MPPT method comprises the following steps: when detecting that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition, setting an MPPT disturbance period for at least one photovoltaic module in the target MPPT photovoltaic circuit; in the MPPT disturbance period, carrying out MPPT disturbance on each photovoltaic module for preset times along a target disturbance direction, and acquiring the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction; and determining the target output voltage of each photovoltaic module meeting the maximum power point condition according to the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction. According to the technical scheme of the embodiment of the invention, the maximum power point of the photovoltaic module can be tracked more accurately, so that the output voltage of the photovoltaic module can be regulated to the target output voltage more accurately, and the energy utilization rate of the photovoltaic module is improved.

Description

Photovoltaic module MPPT method, device, equipment and medium

Technical Field

The invention relates to the field of photovoltaic power generation, in particular to a photovoltaic module MPPT method, a device, equipment and a medium.

Background

Photovoltaic grid-connected power generation is one of the main application modes of solar power generation at present. In order to utilize the solar photovoltaic energy with the Maximum efficiency, an effective MPPT (Maximum Power Point Tracking) method may be adopted for the Maximum output Power of the photovoltaic module, so as to maximize the efficiency of the photovoltaic module.

In a conventional MPPT method, a single-point MPPT method is generally adopted, and power judgment is performed once every time the output voltage of the photovoltaic module is disturbed by one step, so as to judge the disturbance direction of the next step.

However, the method in the prior art needs to be disturbed all the time, which has a certain influence on the stability of the photovoltaic power generation system, and the tracking efficiency is greatly reduced. When the maximum power point is influenced by factors such as weather, the maximum power point cannot be effectively and accurately found.

Disclosure of Invention

The invention provides a photovoltaic module MPPT method, a photovoltaic module MPPT device, photovoltaic module MPPT equipment and a photovoltaic module MPPT medium, which can track the maximum power point of a photovoltaic module more accurately, thereby adjusting the output voltage of the photovoltaic module to a target output voltage more accurately and improving the energy utilization rate of the photovoltaic module.

In a first aspect, an embodiment of the present invention provides a photovoltaic module MPPT method, where the method includes:

when detecting that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition, setting an MPPT disturbance period for at least one photovoltaic module in the target MPPT photovoltaic circuit;

in the MPPT disturbance period, carrying out MPPT disturbance on each photovoltaic module for preset times along a target disturbance direction, and acquiring the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction;

and determining the target output voltage of each photovoltaic module meeting the maximum power point condition according to the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction.

In a second aspect, an embodiment of the present invention provides a photovoltaic module MPPT apparatus, including:

the MPPT disturbance period setting module is used for setting an MPPT disturbance period for at least one photovoltaic module in the target MPPT photovoltaic circuit when detecting that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition;

the output power determining module is used for carrying out MPPT disturbance on each photovoltaic module for preset times along a target disturbance direction in an MPPT disturbance period and acquiring the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction;

and the target output voltage determining module is used for determining the target output voltage of each photovoltaic module meeting the maximum power point condition according to the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction.

In a third aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the photovoltaic module MPPT method provided by any of the embodiments of the present invention.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where computer instructions are stored in the computer-readable storage medium, and the computer instructions are configured to, when executed by a processor, implement the MPPT method for a photovoltaic module provided in any embodiment of the present invention.

According to the technical scheme of the embodiment, when the fact that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition is detected, an MPPT disturbance period is set for at least one photovoltaic module in the target MPPT photovoltaic circuit; in the MPPT disturbance period, carrying out MPPT disturbance on each photovoltaic module for preset times along a target disturbance direction, and acquiring the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction; according to the technical scheme that the target output voltage of each photovoltaic assembly meeting the maximum power point condition is determined according to the output power of each photovoltaic assembly under each MPPT disturbance in the target disturbance direction, the maximum power point of each photovoltaic assembly can be tracked more accurately, and therefore the output voltage of each photovoltaic assembly can be adjusted to the target output voltage more accurately.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a flowchart of a MPPT method for a photovoltaic module according to an embodiment of the present invention;

fig. 2a is a flowchart of another MPPT method for a photovoltaic module according to a second embodiment of the present invention;

figure 2b is a schematic diagram of a target MPPT photovoltaic circuit according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of an MPPT apparatus for a photovoltaic module according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device implementing the MPPT method for the photovoltaic module according to the embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example one

Fig. 1 is a flowchart of an MPPT method for a photovoltaic module according to an embodiment of the present invention, which is applicable to a situation of tracking a maximum power point of a photovoltaic module, and the method may be performed by an MPPT device for a photovoltaic module, which may be implemented in hardware and/or software, and may be generally configured in an electronic device (e.g., a photovoltaic power generation control device).

As shown in fig. 1, the method specifically includes the following steps:

and S110, when the fact that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition is detected, setting an MPPT disturbance period for at least one photovoltaic module in the target MPPT photovoltaic circuit.

In this embodiment, the target MPPT photovoltaic circuit may be a circuit that regulates the output voltage of the photovoltaic module. The real-time bus voltage can be obtained by measuring the voltage of the photovoltaic module output voltage of the target MPPT photovoltaic circuit in real time after passing through the booster circuit. The MPPT condition may be defined as a condition for the real-time bus voltage, such as the real-time bus voltage being equal to a predetermined voltage value, or being within a predetermined voltage range, etc. The MPPT perturbation period may be a preset time duration, for example, 5 seconds may be set as an MPPT perturbation period.

Wherein, photovoltaic module can be solar cell panel. The target MPPT photovoltaic circuit may be comprised of one or more photovoltaic modules, a BOOST loop, a high voltage bus, and an inverter loop.

And S120, carrying out MPPT disturbance on each photovoltaic module for preset times along the target disturbance direction in the MPPT disturbance period, and acquiring the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction.

In this embodiment, the target disturbance direction may be a direction of change of the output voltage of the photovoltaic module after the disturbance. For example, the voltage value may be gradually increased, or the voltage value may be gradually decreased. The MPPT perturbation may be adjusting an output voltage of the photovoltaic module according to a target perturbation direction. The preset times can be times of disturbing the output voltage of the photovoltaic module in the MPPT disturbing period.

Wherein, the changing direction can be positive or negative. The positive disturbance may be an increase in the output voltage of the photovoltaic module and the negative disturbance may be a decrease in the output voltage of the photovoltaic module.

In a specific embodiment, the MPPT perturbation period may be set to 5 seconds, and the preset perturbation number may be set to 5 times, so that the MPPT perturbation along the target perturbation direction may be performed once every 1 second. Specifically, the output voltage of the photovoltaic module can be adjusted by adjusting the Pulse Width Modulation (PWM) duty ratio of the BOOST circuit voltage, so that the photovoltaic module can work at the maximum power point relatively stably. After the photovoltaic module is disturbed every time, the output power of the photovoltaic module under each MPPT disturbance can be obtained.

S130, determining target output voltage of each photovoltaic assembly meeting the maximum power point condition according to the output power of each photovoltaic assembly under each MPPT disturbance in the target disturbance direction.

In this embodiment, after each photovoltaic module is subjected to MPPT perturbation for a preset number of times, a corresponding preset number of output powers can be obtained. The magnitude of each output power is different. The maximum power point condition may be whether the number of perturbations corresponding to the maximum power in each output power is a target perturbation number. And when the disturbance times corresponding to the maximum power point are the target disturbance times, taking the output voltage of the photovoltaic module corresponding to the maximum power point as the target output voltage.

The MPPT disturbance period is set, and the target output voltage of the photovoltaic module can be determined more quickly and accurately by carrying out disturbance for a preset number of times.

According to the technical scheme of the embodiment, when the fact that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition is detected, an MPPT disturbance period is set for at least one photovoltaic module in the target MPPT photovoltaic circuit; in the MPPT disturbance period, carrying out MPPT disturbance on each photovoltaic module for preset times along a target disturbance direction, and acquiring the output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction; according to the technical scheme that the target output voltage of each photovoltaic assembly meeting the maximum power point condition is determined according to the output power of each photovoltaic assembly under each MPPT disturbance in the target disturbance direction, the maximum power point of the photovoltaic assembly can be tracked more accurately, so that the output voltage of the photovoltaic assembly can be adjusted to the target output voltage more accurately, and the energy utilization rate of the photovoltaic assembly is improved.

Example two

Fig. 2a is a flowchart of another MPPT method for a photovoltaic module according to a second embodiment of the present invention. The present embodiment is a further refinement of the above technical solutions, and the technical solutions in the present embodiment may be combined with various alternatives in one or more of the above embodiments.

As shown in fig. 2a, the method specifically includes the following steps:

s201, when it is detected that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition, an MPPT disturbance period is set for at least one photovoltaic module in the target MPPT photovoltaic circuit.

In an optional implementation manner of the embodiment of the present invention, detecting that the real-time bus voltage in the target MPPT photovoltaic circuit satisfies the MPPT condition may include: and if the real-time bus voltage is smaller than the preset target bus voltage, determining that the real-time bus voltage meets the MPPT condition.

In this embodiment, the target bus voltage may be a preset voltage value. And when the real-time bus voltage is smaller than the target bus voltage, determining that the real-time bus voltage meets the MPPT condition.

During the MPPT disturbance period, the operations S202-S204 are respectively executed for each photovoltaic assembly:

s202, obtaining step length matched with the target disturbance direction.

In this embodiment, the step size may be a voltage value that needs to be increased or decreased for each disturbance according to the target disturbance direction.

And S203, updating to obtain the disturbance voltage according to the step length and the current disturbance times.

In this embodiment, the step size may be a voltage value that needs to be increased or decreased for each disturbance according to the target disturbance direction. The disturbance voltage may be an output voltage of the photovoltaic module after each disturbance. After each disturbance, the disturbance times are recorded so as to update the current disturbed times.

In an optional implementation manner of the embodiment of the present invention, updating the obtained disturbance voltage according to the step size and the current disturbed number may include:

updating according to preset initial voltage, step length and current disturbed times to obtain disturbed voltage; and the larger the current disturbance times are, the larger the difference between the disturbance voltage and the initial voltage along the target disturbance direction is.

In this embodiment, the initial voltage may be an output voltage of the photovoltaic module without MPPT disturbance or a voltage after a MPPT disturbance period.

In one embodiment, based on the initial voltage of the photovoltaic module, the disturbance voltage obtained by each disturbance may be the initial voltage plus the number of times of current disturbance times the step size.

The current disturbance times may be several disturbances before the current disturbance.

In the present embodiment, in the perturbation period of MPPT, perturbation is always performed along the target perturbation direction, that is, the output voltage of the photovoltaic module is always increased or decreased, so the greater the difference between the perturbation voltage and the initial voltage along the target perturbation direction is.

S204, disturbing the photovoltaic module according to the disturbance voltage, and acquiring the output power of the photovoltaic module aiming at the disturbance voltage.

In this embodiment, after the disturbance voltage of each disturbance of the photovoltaic module is obtained, the corresponding output power may be calculated according to each disturbance voltage.

And S205, after the new current disturbance times are obtained through updating, judging whether the current disturbance times reach a preset time, if so, executing S206, and if not, returning to execute S203.

In this embodiment, in the MPPT perturbation cycle, the photovoltaic module is perturbed by the preset perturbation frequency until the perturbation frequency reaches the preset perturbation frequency.

S206, determining target output voltage of each photovoltaic assembly meeting the maximum power point condition according to the output power of each photovoltaic assembly under each MPPT disturbance in the target disturbance direction.

In an optional implementation manner of the embodiment of the present invention, determining, according to output power of each photovoltaic module in a target disturbance direction under each MPPT disturbance, a target output voltage at which each photovoltaic module meets a maximum power point condition may include:

s2061, if the output power of at least one first photovoltaic module under the MPPT disturbance of the target disturbance direction for the target times is the maximum output power, taking the disturbance voltage of each first photovoltaic module under the MPPT disturbance of the target times as the output voltage of each first photovoltaic module.

In this embodiment, the first photovoltaic module may be a photovoltaic module of which the output power of the photovoltaic module in the target MPPT photovoltaic circuit under the MPPT perturbation for the first target number of times is the maximum output power.

In one embodiment, the first target number may be set to a third number. Then, if the output power of at least one first photovoltaic module in the photovoltaic circuit under the third MPPT disturbance in the target disturbance direction is the maximum output power, the disturbance voltage of each first photovoltaic module under the third MPPT disturbance is used as the target output voltage of each first photovoltaic module.

S2062, if the output power of at least one second photovoltaic module under the MPPT disturbance of the target disturbance direction for the target times is not the maximum output power, setting a new MPPT disturbance period for each second photovoltaic module.

In this embodiment, the second photovoltaic module may be a photovoltaic module of which the output power of the photovoltaic module in the target MPPT photovoltaic circuit under the MPPT perturbation for the first target number of times is not the maximum output power. The new MPPT perturbation period may be a next time period (duration) after the last MPPT perturbation period is finished. The next 5 seconds can be set as a new MPPT perturbation period, for example.

And S2063, in the new MPPT disturbance period, carrying out MPPT disturbance on each second photovoltaic module for preset times along the direction opposite to the target disturbance direction, and acquiring the output power of each second photovoltaic module under each MPPT disturbance in the opposite direction.

In this embodiment, the direction opposite to the target perturbation direction may be the direction opposite to the change direction of the output voltage of the photovoltaic module in the current MPPT perturbation period. If the target disturbance direction is positive increase, the reverse direction is negative decrease.

And S2064, taking the disturbance voltage of each second photovoltaic module under the MPPT disturbance of the first target times as the target output voltage of each second photovoltaic module.

In one embodiment, the first target number is also a third number. And taking the disturbance voltage of each second photovoltaic module under third MPPT disturbance in the direction opposite to the target disturbance direction as the target output voltage of each second photovoltaic module.

Further, in an optional implementation of an embodiment of the present invention, the target MPPT photovoltaic circuit further includes: at least one booster circuit correspondingly connected with each photovoltaic module respectively; the real-time bus voltage in the target MPPT photovoltaic circuit is the voltage on the high-voltage bus connected with each booster circuit.

Figure 2b is a schematic diagram of a target MPPT photovoltaic circuit according to a second embodiment of the present invention. As shown in fig. 2b, PV is a photovoltaic module, BOOST is a BOOST circuit, and Inverter is an Inverter.

In this embodiment, after the target output voltages of the photovoltaic modules in the target MPPT photovoltaic circuit are determined, the BOOST circuit BOOSTs the target output voltages to obtain voltages on the high-voltage buses connected to the BOOST circuits, that is, real-time bus voltages.

According to the technical scheme of the embodiment of the invention, when the fact that the real-time bus voltage in the target MPPT photovoltaic circuit meets the MPPT condition is detected, an MPPT disturbance period is set for at least one photovoltaic module in the target MPPT photovoltaic circuit; in the MPPT disturbance period, obtaining a step length matched with a target disturbance direction, and updating according to the step length and the current disturbance times to obtain a disturbance voltage; disturbing the photovoltaic module according to the disturbance voltage, and acquiring the output power of the photovoltaic module aiming at the disturbance voltage; after the new current disturbed times are obtained through updating, returning to execute the operation of obtaining the disturbed voltage through updating according to the step length and the current disturbed times until the current disturbed times reach the preset times; according to the technical scheme that the target output voltage of each photovoltaic assembly meeting the maximum power point condition is determined according to the output power of each photovoltaic assembly under each MPPT disturbance in the target disturbance direction, the influence of the environment on the photovoltaic assemblies can be effectively overcome, the maximum power point of the photovoltaic assemblies can be tracked more comprehensively and accurately, and the energy utilization rate of the photovoltaic assemblies is improved.

EXAMPLE III

Fig. 3 is a schematic structural diagram of a photovoltaic module MPPT apparatus according to a third embodiment of the present invention. As shown in fig. 3, the apparatus includes: MPPT perturbation period setting module 310, output power determining module 320, target output voltage determining module 330, wherein:

an MPPT perturbation period setting module 310, configured to set an MPPT perturbation period for at least one photovoltaic module in the target MPPT photovoltaic circuit when it is detected that a real-time bus voltage in the target MPPT photovoltaic circuit satisfies an MPPT condition;

the output power determining module 320 is configured to perform MPPT disturbance on each photovoltaic module for a preset number of times along a target disturbance direction in an MPPT disturbance period, and acquire an output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction;

and a target output voltage determining module 330, configured to determine, according to the output power of each photovoltaic module in the target disturbance direction under each MPPT disturbance, a target output voltage at which each photovoltaic module meets a maximum power point condition.

Optionally, the MPPT perturbation period setting module 310 includes:

and the MPPT condition determining unit is used for determining that the real-time bus voltage meets the MPPT condition if the real-time bus voltage is less than the preset target bus voltage.

Optionally, the output power determining module 320 includes:

the first disturbance voltage determination unit is used for acquiring a step length matched with a target disturbance direction and updating according to the step length and the current disturbance times to obtain disturbance voltage;

the second disturbance voltage determining unit is used for updating according to the preset initial voltage, the step length and the current disturbance times to obtain disturbance voltage;

the output power determining unit is used for disturbing the photovoltaic module according to the disturbance voltage and acquiring the output power of the photovoltaic module aiming at the disturbance voltage;

and the disturbance finishing unit is used for returning to execute the operation of obtaining the disturbance voltage according to the step length and the current disturbance times after the new current disturbance times are obtained through updating until the current disturbance times reach the preset times.

Optionally, the target output voltage determining module 330 includes:

the first target output voltage determining unit is configured to, if the output power of at least one first photovoltaic module under the MPPT disturbance for the target disturbance direction for the target number of times is the maximum output power, take the disturbance voltage of each first photovoltaic module under the MPPT disturbance for the target number of times as the target output voltage of each first photovoltaic module.

The disturbance period updating unit is used for setting a new MPPT disturbance period for each second photovoltaic module if the output power of at least one second photovoltaic module under the MPPT disturbance of the target disturbance direction for the first time is not the maximum output power;

the reverse perturbation unit is used for carrying out MPPT perturbation on each second photovoltaic assembly for preset times along the reverse direction of the target perturbation direction in a new MPPT perturbation period and acquiring the output power of each second photovoltaic assembly under each MPPT perturbation in the reverse direction;

and the second target output voltage determining unit is used for taking the disturbance voltage of each second photovoltaic module under the MPPT disturbance of the second target times as the target output voltage of each second photovoltaic module.

The photovoltaic module MPPT device provided by the embodiment of the invention can execute the photovoltaic module maximum power tracking MPPT method provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.

Example four

FIG. 4 shows a schematic block diagram of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the electronic apparatus 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to the bus 14.

A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. Processor 11 performs the various methods and processes described above, such as the photovoltaic module MPPT method.

Namely: when detecting that the real-time bus voltage in a target MPPT photovoltaic circuit meets the MPPT condition, setting an MPPT disturbance period for at least one photovoltaic module in the target MPPT photovoltaic circuit;

In some embodiments, the photovoltaic module MPPT method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the photovoltaic module maximum power tracking MPPT method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the photovoltaic module MPPT method by any other suitable means (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the Internet.

The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A Maximum Power Point Tracking (MPPT) method for a photovoltaic module is characterized by comprising the following steps:

when detecting that the real-time bus voltage in a target MPPT photovoltaic circuit meets the MPPT condition, setting an MPPT disturbance period for at least one photovoltaic module in the target MPPT photovoltaic circuit;

2. The method of claim 1, wherein detecting that a real-time bus voltage in a target MPPT photovoltaic circuit satisfies an MPPT condition comprises:

and if the real-time bus voltage is smaller than a preset target bus voltage, determining that the real-time bus voltage meets the MPPT condition.

3. The method of claim 1, wherein performing MPPT disturbance on each photovoltaic module for a preset number of times along a target disturbance direction in an MPPT disturbance period, and obtaining output power of each photovoltaic module under each MPPT disturbance in the target disturbance direction comprises:

during the MPPT disturbance period, respectively executing the following operations for each photovoltaic assembly:

obtaining a step length matched with the target disturbance direction, and updating according to the step length and the current disturbed times to obtain a disturbance voltage;

disturbing the photovoltaic module according to the disturbance voltage, and acquiring the output power of the photovoltaic module aiming at the disturbance voltage;

and after the new current disturbed times are obtained through updating, returning to execute the operation of obtaining the disturbed voltage through updating according to the step length and the current disturbed times until the current disturbed times reach the preset times.

4. The method of claim 3, wherein updating the obtained perturbation voltage according to the step size and the number of currently perturbed times comprises:

updating according to a preset initial voltage, the step length and the current disturbed times to obtain a disturbed voltage;

and the larger the current disturbed times is, the larger the difference between the disturbed voltage and the initial voltage along the target disturbance direction is.

5. The method according to any one of claims 1 to 4, wherein determining a target output voltage at which each photovoltaic module meets a maximum power point condition according to the output power of each photovoltaic module under each MPPT disturbance in a target disturbance direction comprises:

and if the output power of at least one first photovoltaic module under the MPPT disturbance for the target disturbance direction for the first target times is the maximum output power, taking the disturbance voltage of each first photovoltaic module under the MPPT disturbance for the first target times as the target output voltage of each first photovoltaic module.

6. The method according to any one of claims 1 to 4, wherein determining a target output voltage at which each photovoltaic module meets a maximum power point condition according to the output power of each photovoltaic module under each MPPT disturbance in a target disturbance direction comprises:

if the output power of at least one second photovoltaic module under the MPPT disturbance of the target disturbance direction for the first target number of times is not the maximum output power, setting a new MPPT disturbance period for each second photovoltaic module;

in a new MPPT disturbance period, carrying out MPPT disturbance on each second photovoltaic module for preset times along the direction opposite to the target disturbance direction, and acquiring the output power of each second photovoltaic module under each MPPT disturbance in the opposite direction;

and taking the disturbance voltage of each second photovoltaic module under the MPPT disturbance of the second photovoltaic module for the first target times as the target output voltage of each second photovoltaic module.

7. The method of any of claims 1-4, wherein the target MPPT photovoltaic circuit further comprises: at least one booster circuit correspondingly connected with each photovoltaic module respectively;

and the real-time bus voltage in the target MPPT photovoltaic circuit is the voltage on a high-voltage bus connected with each booster circuit.

8. A photovoltaic module Maximum Power Point Tracking (MPPT) device, the device comprises:

the MPPT disturbance period setting module is used for setting an MPPT disturbance period for at least one photovoltaic module in a target MPPT photovoltaic circuit when detecting that the real-time bus voltage in the target MPPT photovoltaic circuit meets MPPT conditions;

9. An electronic device, characterized in that the electronic device comprises:

at least one processor; and

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the photovoltaic module maximum power point tracking, MPPT, method of any one of claims 1-7.

10. A computer readable storage medium having stored thereon computer instructions for causing a processor, when executed, to implement the photovoltaic module maximum power point tracking, MPPT, method of any one of claims 1-7.