Photovoltaic MPPT (maximum power point tracking) conductance increment method and system for IGBT (insulated gate bipolar transistor) duty ratio regulation and control

Abstract

The invention discloses a photovoltaic MPPT (Maximum Power Point Tracking) conductance increment method and system for IGBT (Insulated Gate Bipolar Translator) duty ratio regulation and control, and relates to the technical field of power system engineering. Obtaining the voltage and current of the photovoltaic array, and calculating the variation of the voltage and current; calculating the change of the power according to the variation of the voltage and the current; adjusting the step length according to the absolute value of the power change; adjusting the duty ratio according to the power change; and performing secondary feedback according to the adjusted duty ratio and step length. The method provided by the invention is especially suitable for occasions with large environmental factor changes, and can realize accurate control of the output voltage and current of the photovoltaic panel, thereby optimizing the power output. The self-adaptive adjustment not only can cope with rapidly changing environmental conditions, but also can prevent power loss caused by fixed parameter setting, and improves the overall electric energy conversion efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power system engineering, and in particular to a photovoltaic MPPT conductance increment method and system for IGBT duty cycle regulation. Background Art

[0002] Solar photovoltaic power generation, a key method of utilizing solar energy, works by converting sunlight directly into electricity through the photovoltaic effect. However, due to environmental factors such as changes in sunlight intensity and temperature fluctuations, the output power of photovoltaic power generation systems constantly fluctuates. This requires the system to be able to adjust in real time to ensure maximum power output from the photovoltaic panels.

[0003] Maximum power point tracking (MPPT) technology was developed to address this need. It's a power electronics technology used to optimize the power output of photovoltaic systems, ensuring the array always operates at its optimal power output point. By monitoring the system's voltage and current in real time and performing calculations, the MPPT controller adjusts the voltage connected to the array to optimize power output.

[0004] For example, the incremental conductance method (ICM) can be used to determine the power change by comparing the instantaneous conductance with the incremental conductance, and then adjust the output voltage to approach the maximum power point.

[0005] Furthermore, given the differences in PV system performance across different geographic locations and climate conditions, adaptive adjustments can be optimized based on specific circumstances, improving the system's adaptability and overall efficiency. This not only helps boost power output but also improves the system's economy, reliability, and lifespan.

[0006] In short, with the advancement of photovoltaic technology and the continuous reduction of costs, combined with efficient MPPT technology, especially its adaptive adjustment strategy, solar photovoltaic power generation will play an increasingly important role in the transformation of the global energy structure. In the future, this technology is expected to be further optimized to better address the challenges of the global energy crisis and climate change.

[0007] There are currently several studies on optimizing photovoltaic MPPT methods. For example, the current negative feedback method described in the paper "Research on Photovoltaic MPPT Control Strategies Based on an Improved Perturbation and Observation Method" demonstrates significant control effectiveness and good results. However, the perturbation and observation method is generally unable to accurately determine whether the load is to the left or right of the maximum power point (MPP), and its stability needs to be improved.

[0008] This invention provides a photovoltaic MPPT conductance increment method with adaptive IGBT duty cycle control, designed to improve the energy harvesting efficiency and system stability of photovoltaic power generation systems under various environmental conditions. The core of this method is the introduction of a dynamic adjustment mechanism that monitors the voltage and current changes of the photovoltaic panel in real time, calculates the conductance and its increment, and uses this information to determine the trend of power changes. The control system dynamically adjusts the operating point of the photovoltaic panel based on the conductance changes, ensuring that it always remains close to the maximum power point. Key functions include: dynamically adjusting the operating voltage using the incremental conductance method to adapt to environmental changes in real time; maximizing photovoltaic power generation efficiency through precise monitoring and algorithm adjustment; and improving the system's response speed and stability to environmental changes. Summary of the Invention

[0009] In view of the above-mentioned problems, the present invention is proposed.

[0010] Therefore, the technical problem solved by the present invention is to improve the energy collection efficiency and system stability of the photovoltaic power generation system under various environmental conditions.

[0011] In order to solve the above technical problems, the present invention provides the following technical solution: a photovoltaic MPPT conductance increment method controlled by IGBT duty cycle, which comprises the following steps:

[0012] Initialize variables; obtain the voltage and current of the photovoltaic array and calculate the changes in voltage and current; calculate the change in power through the changes in voltage and current; adjust the step size according to the absolute value of the power change; adjust the duty cycle according to the power change; and provide secondary feedback based on the adjusted duty cycle and step size.

[0013] As a preferred solution of the photovoltaic MPPT conductance increment method for IGBT duty cycle control described in the present invention, the initialization variables include an initial duty cycle D, an initial step size ΔD, a lower limit δ1 of the absolute value of the power change, and an upper limit δ2 of the absolute value of the power change.

[0014] As a preferred solution of the photovoltaic MPPT conductance increment method for IGBT duty cycle control described in the present invention, the voltage and current of the photovoltaic array obtained are the current voltage U(k), current I(k) and the voltage U(k-1) and I(k-1) of the photovoltaic array at the previous moment.

[0015] The changes in voltage and current are expressed as,

[0016] ΔU=U(k)-U(k-1)

[0017] ΔI=I(k)-I(k-1)

[0018] Here, ΔU represents the change in voltage, and ΔI represents the change in current.

[0019] The power change is expressed as,

[0020] ΔP=ΔI·U(k)+I(k)·ΔU.

[0021] As a preferred solution of the photovoltaic MPPT conductance increment method for IGBT duty cycle control of the present invention, wherein: the absolute value of the power change is expressed as Abs(ΔP), and the adjustment step size includes judging whether the absolute value of the power change Abs(ΔP) is less than δ1. If Abs(ΔP) is less than δ1, the adjustment step size is If Abs(ΔP) is greater than δ1, determine whether Abs(ΔP) is greater than δ2. If Abs(ΔP) is greater than δ2, adjust the step size to ΔD*2. If Abs(ΔP) is less than or equal to δ2, adjust the duty cycle of the IGBT.

[0022] As a preferred solution of the photovoltaic MPPT conductance increment method for IGBT duty cycle control according to the present invention, wherein: the adjusting the duty cycle of the IGBT includes making a judgment based on the change in power, wherein, if ΔP is equal to 0, the duty cycle is kept unchanged, and if ΔP is not equal to 0, ΔP is compared with 0, wherein, if ΔP is greater than 0, it is judged whether the variable flow rate ΔI of the current is equal to 0, and if it is equal to 0, the current duty cycle D(k)=D(k-1)+ΔD is adjusted, and if it is not equal to 0, the current duty cycle D(k)=D(k-1)-ΔD is adjusted, and if ΔP is less than 0, it is judged whether the variable flow rate ΔI of the current is equal to 0, and if it is equal to 0, the current duty cycle D(k)=D(k-1)-ΔD is adjusted, and if it is not equal to 0, the current duty cycle D(k)=D(k-1)+ΔD is adjusted.

[0023] After the duty cycle adjustment is completed, U(k), I(k) and D(k) are updated to the values ​​of the current cycle, and secondary feedback is performed to prepare for the next iteration.

[0024] As a preferred solution of the photovoltaic MPPT conductance increment method for IGBT duty cycle control described in the present invention, the secondary feedback includes continuously collecting real-time voltage and current data of the photovoltaic array after adjusting the duty cycle and step size, calculating the adjusted power output, and determining whether the adjustment achieves the expected effect.

[0025] As a preferred solution of the photovoltaic MPPT conductivity increment method for IGBT duty cycle control described in the present invention, wherein: achieving the expected effect includes evaluating the total energy output and conversion efficiency after adjustment. If the total energy output and conversion efficiency are higher than those before adjustment within the evaluation time, it means that the adjustment is effective.

[0026] Another object of the present invention is to provide a photovoltaic MPPT conductivity increment system with IGBT duty cycle control, which can adapt to real-time voltage and current changes by automatically adjusting the IGBT duty cycle, thereby solving the problems of slow response speed and insufficient adaptability of existing photovoltaic maximum power point tracking systems.

[0027] To solve the above technical problems, the present invention provides the following technical solutions: a photovoltaic MPPT conductivity increment system with IGBT duty cycle control, comprising a data acquisition module, a data processing module, a control decision module and an IGBT drive module.

[0028] The data acquisition module is responsible for real-time monitoring and collecting the voltage and current data of the photovoltaic array.

[0029] The data processing module calculates the changes in voltage and current, and further calculates the changes in power.

[0030] The control decision module adjusts the step size and duty cycle based on the absolute value of the power change.

[0031] The IGBT driver module adjusts the duty cycle of the IGBT according to the output of the control decision module. A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the photovoltaic MPPT conductance increment method for IGBT duty cycle control are implemented as described above.

[0032] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the photovoltaic MPPT conductance increment method for IGBT duty cycle control as described above.

[0033] The present invention's beneficial effects: The proposed method is particularly suitable for applications with large variations in environmental factors (such as temperature and light intensity), enabling precise control of the photovoltaic panel's output voltage and current, thereby optimizing power output. This adaptive adjustment not only copes with rapidly changing environmental conditions but also prevents power loss caused by fixed parameter settings, thereby improving overall power conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is an overall flow chart of the photovoltaic MPPT conductance increment method for IGBT duty cycle control provided by the first embodiment of the present invention.

[0036] Figure 2 This is a photovoltaic power generation topology diagram in the photovoltaic MPPT conductance increment method with IGBT duty cycle control provided by the first embodiment of the present invention.

[0037] Figure 3 This is a flow chart of a photovoltaic MPPT conductance increment method for IGBT duty cycle control provided by the first embodiment of the present invention.

[0038] Figure 4 This is the overall framework diagram of the photovoltaic MPPT conductivity increment system with IGBT duty cycle control provided by the second embodiment of the present invention.

[0039] Figure 5 This is a simulation result diagram of the small-step conductance increment method in the photovoltaic MPPT conductance increment method for IGBT duty cycle control provided by the third embodiment of the present invention.

[0040] Figure 6 This is a simulation result diagram of the large-step conductance increment method in the photovoltaic MPPT conductance increment method for IGBT duty cycle control provided by the third embodiment of the present invention.

[0041] Figure 7 This is a diagram showing simulation results of the photovoltaic MPPT conductance increment method for IGBT duty cycle control provided by the third embodiment of the present invention. DETAILED DESCRIPTION

[0042] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0043] Example 1, with reference to Figures 1 to 3 , as an embodiment of the present invention, provides a photovoltaic MPPT conductance increment method for IGBT duty cycle control, characterized by:

[0044] Based on the traditional conductance increment method, the duty cycle of the IGBT is adaptively adjusted according to the current state of the system to improve the speed and stability of tracking the maximum power point.

[0045] The traditional conductance increment method is an algorithm used to achieve maximum power point tracking (MPPT) in photovoltaic systems.

[0046] The duty cycle of an IGBT refers to the percentage of time the IGBT is on. The signal that controls the on and off of the IGBT is called a PWM signal.

[0047] The maximum power point refers to the point where the photovoltaic array output power is the highest.

[0048] Tracking speed and stability refer to the control speed and stability when controlling the photovoltaic array operating point to approach the maximum power point.

[0049] like Figure 2 FIG. 1 shows an application scenario of the present invention, where PWM stands for pulse width modulation.

[0050] S1: Initialize variables.

[0051] Initialization variables include an initial duty cycle D, an initial step size ΔD, a lower limit δ1 of the absolute value of the power change, and an upper limit δ2 of the absolute value of the power change.

[0052] In the present invention, the variable values ​​are set according to the specific system parameters. Here, the initial duty cycle D is set to 0.5 (range is between 0 and 1). The initial step size ΔD is set to 0.01. The lower limit of the power change δ1 is set to 0.01, and the upper limit of the power change δ2 is set to 0.02.

[0053] The adaptive adjustment process is as follows Figure 3 shown.

[0054] S2: Obtain the voltage and current of the photovoltaic array and calculate the changes in voltage and current.

[0055] The voltage and current of the photovoltaic array are obtained as the current voltage U(k), current I(k) and the voltage U(k-1) and I(k-1) of the photovoltaic array at the previous moment.

[0056] The changes in voltage and current are expressed as,

[0057] ΔU=U(k)-U(k-1)

[0058] ΔI=I(k)-I(k-1)

[0059] Here, ΔU represents the change in voltage, and ΔI represents the change in current.

[0060] S3: Calculate the change in power by the change in voltage and current.

[0061] The change in power is expressed as,

[0062] ΔP=ΔI·U(k)+I(k)·ΔU.

[0063] S4: Adjust the step size according to the absolute value of the power change.

[0064] The absolute value of the power change is expressed as Abs(ΔP). The adjustment step includes judging whether the absolute value of the power change Abs(ΔP) is less than δ1. If Abs(ΔP) is less than δ1, the adjustment step is The step size is reduced to adjust the duty cycle more finely. If Abs(ΔP) is greater than δ1, it is determined whether Abs(ΔP) is greater than δ2. If Abs(ΔP) is greater than δ2, the adjustment step size is ΔD*2. The step size is increased to approach the MPP faster. If Abs(ΔP) is less than or equal to δ2, the duty cycle of the IGBT is adjusted.

[0065] S5: Adjust the duty cycle according to the power change.

[0066] Adjusting the IGBT duty cycle involves adjusting the IGBT duty cycle to optimize the PV array's operating point, bringing it closer to or reaching its maximum power point. The adaptive adjustment mechanism automatically adjusts the duty cycle based on changes in output power, continuously fine-tuning until the optimal point is found.

[0067] A judgment is made based on the change in power, where if ΔP is equal to 0, the duty cycle is kept unchanged; if ΔP is not equal to 0, ΔP is compared with 0; where if ΔP is greater than 0, whether the variable current flow ΔI is equal to 0 is judged; if it is equal to 0, the current duty cycle D(k)=D(k-1)+ΔD is adjusted; if it is not equal to 0, the current duty cycle D(k)=D(k-1)-ΔD is adjusted; if ΔP is less than 0, whether the variable current flow ΔI is equal to 0 is judged; if it is equal to 0, the current duty cycle D(k)=D(k-1)-ΔD is adjusted; if it is not equal to 0, the current duty cycle D(k)=D(k-1)+ΔD is adjusted.

[0068] After the duty cycle adjustment is completed, U(k), I(k) and D(k) are updated to the values ​​of the current cycle, and secondary feedback is performed to prepare for the next iteration.

[0069] To summarize, if power increases (ΔP > 0), the change in current determines whether to increase or decrease the duty cycle. If the current does not change, it means that increasing the voltage will increase power, so increase the duty cycle. If the current changes (meaning that the voltage and current increase and decrease simultaneously), it may be on the other side of the MPP, so decrease the duty cycle.

[0070] If the power decreases (ΔP<0), the duty cycle is increased or decreased based on the current change. The logic is opposite to that when the power increases.

[0071] If ΔP=0, keep the duty cycle unchanged and consider that the MPP is found or very close.

[0072] S6: Perform secondary feedback based on the adjusted duty cycle and step size.

[0073] Performing secondary feedback includes continuously collecting real-time voltage and current data of the PV array after adjusting the duty cycle and step size, calculating the adjusted power output, and determining whether the adjustment has achieved the expected effect.

[0074] Achieving the expected effect includes evaluating the total energy output and conversion efficiency after adjustment. If the total energy output and conversion efficiency are higher than before the adjustment within the evaluation time, it means that the adjustment is effective.

[0075] Example 2, reference Figure 4 , which is an embodiment of the present invention, provides a system for a photovoltaic MPPT conductance increment method with IGBT duty cycle control, characterized by comprising a data acquisition module, a data processing module, a control decision module and an IGBT drive module.

[0076] The data acquisition module is responsible for real-time monitoring and collection of voltage and current data of the photovoltaic array.

[0077] The data processing module calculates the changes in voltage and current, and further calculates the changes in power.

[0078] The control decision module adjusts the step size and duty cycle based on the absolute value of the power change.

[0079] The IGBT driving module adjusts the duty cycle of the IGBT according to the output of the control decision module.

[0080] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0081] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0082] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0083] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0084] Example 3, reference Figure 5-Figure 7 In this embodiment, in order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0085] Under the conditions of temperature of 25℃ and light intensity of 800W / m2, the control performance of the small step conductivity increment method, large step conductivity increment method and the control method proposed by the present invention are compared. The simulation results are as follows: Figure 5 、 Figure 6 、 Figure 7 As shown in the figure, the small step size and large step size of the duty cycle adjustment are set to 1e-5 and 1e-4 respectively.

[0086] The simulation results show that the small-step conductivity increment method has a small steady-state oscillation amplitude of approximately 0.1%, but a slow tracking speed, with a dynamic rise time of 0.023s. The large-step conductivity increment method has a fast tracking speed, with a dynamic rise time of 0.006s, but a larger steady-state oscillation amplitude of approximately 2.3%. The control method proposed in this invention has a fast tracking speed, a dynamic rise time of 0.007s, and a small steady-state oscillation amplitude of approximately 0.1%. In summary, the control method proposed in this invention effectively balances the dynamic and static performance of the system.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. Photovoltaic MPPT conductivity increment method for IGBT duty cycle control, It is characterized in that include: Initialize variables; Obtain the voltage and current of the photovoltaic array and calculate the changes in voltage and current; Calculate the change in power by the change in voltage and current; The step size is adjusted according to the absolute value of the power change; Adjust duty cycle according to power changes; Secondary feedback is performed based on the adjusted duty cycle and step size.

2. The photovoltaic MPPT conductance increment method for IGBT duty cycle control as claimed in claim 1, Features: The initialization variables include the initial duty cycle D, the initial step length ΔD, the lower limit of the absolute value of the power change δ 1 , the upper limit of the absolute value of power change δ 2 .

3. The photovoltaic MPPT conductance increment method for IGBT duty cycle control as claimed in claim 2, Features: The voltage and current of the photovoltaic array are obtained by the current voltage U(k), current I(k) and the voltage U(k-1) and I(k-1) of the photovoltaic array at the previous moment; The changes in voltage and current are expressed as, ΔU=U(k)-U(k-1) ΔI=I(k)-I(k-1) Among them, ΔU represents the change in voltage, and ΔI represents the change in current; The power change is expressed as, ΔP=ΔI·U(k)+I(k)·ΔU.

4. The photovoltaic MPPT conductance increment method for IGBT duty cycle control as claimed in claim 3, Features: The absolute value of the power change is expressed as Abs(ΔP), and the adjustment step includes determining whether the absolute value of the power change Abs(ΔP) is less than δ 1 , if Abs(ΔP) is less than δ 1 , then the adjustment step size is If Abs(ΔP) is greater than δ 1 , then determine whether Abs(ΔP) is greater than δ 2 , if Abs(ΔP) is greater than δ 2 , then the adjustment step is ΔD*2, if Abs(ΔP) is less than or equal to δ 2 , then adjust the duty cycle of the IGBT.

5. The photovoltaic MPPT conductance increment method for IGBT duty cycle control as claimed in claim 4, Features: The step of adjusting the duty cycle of the IGBT includes making a judgment based on the amount of power change, wherein if ΔP is equal to 0, the duty cycle is kept unchanged, and if ΔP is not equal to 0, ΔP is compared with 0, wherein if ΔP is greater than 0, whether the variable current flow ΔI is equal to 0 is judged, and if it is equal to 0, the current duty cycle D(k)=D(k-1)+ΔD is adjusted, and if it is not equal to 0, the current duty cycle D(k)=D(k-1)-ΔD is adjusted, and if ΔP is less than 0, whether the variable current flow ΔI is equal to 0 is judged, and if it is equal to 0, the current duty cycle D(k)=D(k-1)-ΔD is adjusted, and if it is not equal to 0, the current duty cycle D(k)=D(k-1)+ΔD is adjusted; After the duty cycle adjustment is performed, U(k), I(k) and D(k) are updated to the values ​​of the current cycle, and secondary feedback is performed to prepare for the next iteration.

6. The photovoltaic MPPT conductance increment method for IGBT duty cycle control as claimed in claim 5, Features: The secondary feedback includes, after adjusting the duty cycle and the step size, continuously collecting the real-time voltage and current data of the photovoltaic array, calculating the adjusted power output, and determining whether the adjustment achieves the expected effect.

7. The photovoltaic MPPT conductance increment method for IGBT duty cycle control as claimed in claim 6, Features: Achieving the expected effect includes evaluating the total energy output and conversion efficiency after adjustment. If the total energy output and conversion efficiency are higher than before the adjustment within the evaluation time, it means that the adjustment is effective.

8. A system using the photovoltaic MPPT conductance increment method of IGBT duty cycle control as described in any one of claims 1 to 7, Features: Including data acquisition module, data processing module, control decision module and IGBT drive module; The data acquisition module is responsible for real-time monitoring and collecting voltage and current data of the photovoltaic array; The data processing module calculates the changes in voltage and current, and further calculates the changes in power; The control decision module adjusts the step size and duty cycle based on the absolute value of the power change; The IGBT driving module adjusts the duty cycle of the IGBT according to the output of the control decision module.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program. It is characterized in that When the processor executes the computer program, the steps of the photovoltaic MPPT conductance increment method for IGBT duty cycle control according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor, the steps of the photovoltaic MPPT conductance increment method with IGBT duty cycle control as described in any one of claims 1 to 7 are implemented.

Images