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Journal ArticleDOI

PI Controller based MPPT for a PV System

TL;DR: A PI controller is used as an intelligent method for Maximum Power Point Tracking (MPPT) for a PV system and a boost converter is used to boost the voltage.
Abstract: To meet the future energy requirement and to give quality and pollution free supply to growing and environment conscious population, the present world is giving special attention to natural, clean and renewable energy sources. Due to growing demand for electrical energy and environmental issues such as pollution and global warming effect, solar energy is considered among one of the best options for generating clean energy. In this paper a PI controller is used as an intelligent method for Maximum Power Point Tracking (MPPT) for a PV system. PI controller has been used for achieving the Maximum Power Point of a PV system. A boost converter is used to boost the voltage. Keywords - PI controller, Maximum power point tracking, MPPT algorithm, Photovoltaic system

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Citations
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Journal ArticleDOI
TL;DR: In this article, a genetic neural algorithm was used to predict the closest point to the maximum power point (MPP), which will be the kickoff point of the search process, and the new method reached the target MPP in less than 100 sample times compared to tens of thousands of samples for conventional methods.
Abstract: The development of maximum power point tracking (MPPT) is continuing in order to increase the energy transfer efficiency of the solar photovoltaic system. This paper provides a review of the conventional maximum power point tracking techniques that is enhanced by the presentation of a new technique. The new method is based on a genetic neural algorithm in order to predict the closest point to the maximum power point (MPP), which will be the kickoff point of the search process. Not only does the new technique start the search process from the nearest point to the MPP, but also the developed search algorithm is very fast. Consequently, the time taken to reach the MPP is reduced. In order to determine the new MPPT performance, a complete photovoltaic generator system is modeled and simulated using the MATLAB/SIMULINK package. Simulation results show that the new technique reaches the MPP in less than 100 sample times compared to tens of thousands of samples for conventional methods. Furthermore, the new technique reaches directly the target MPP with small deviation from the intended values. Consequently, the new technique has a significant improvement in energy extraction efficiency from the photovoltaic array to the load, in addition to higher tracking speed and system stability compared to the conventional ones.

45 citations

Journal ArticleDOI
TL;DR: The maximum power point tracking (MPPT) technique for increasing the output voltage of the photovoltaic (PV) system is presented and the Simulation result from MATLAB/SIMULINK is presented to verify the performance of the converter.
Abstract: This paper presents the maximum power point tracking (MPPT) technique for increasing the output voltage of the photovoltaic (PV) system. In order to increase the output voltage of the system, boost converter is connected to the PV system. However, when connecting the boost converter to the PV system the voltage value at the output equal to the input voltage. According to the principle of boost converter, output voltage must be higher than the input voltage. The output voltage depends upon the switching frequency and duty cycle of the converter. As to increase the output voltage of the PV system based on boost converter characteristics. The control strategies can be used based on the combination between the Particle Swarm Optimization (PSO) method and the Proportional Integral (PI) controller that strategies can be extract the maximum power from a PV system. The PI Controller is used to tracking the maximum power from the PV panel, at different atmospheric condition. The Solar PV power generation system is comprised several elements like solar panel, DC-DC converter, MPPT Control Strategies and load.The Simulation result from MATLAB/SIMULINK is presented to verify the performance of the converter.

22 citations


Cites background from "PI Controller based MPPT for a PV S..."

  • ...In general, there is a single point on the V-I or V-P curve is called as MPP, at which the entire PV system operates with maximum efficiency and produces its maximum output power [10]....

    [...]

Proceedings ArticleDOI
25 Jun 2015
TL;DR: In this paper, a ProportionalIntegral (PI) based Maximum Power Point Tracking (MPPT) control algorithm is proposed to enhance the generated power from photovoltaic PV panels.
Abstract: A Proportional-Integral (PI) based Maximum Power Point Tracking (MPPT) control algorithm is proposed in this study where it is applied to a Buck-Boost converter. It is aimed to combine regular PI control and MPPT technique to enhance the generated power from photovoltaic PV) panels. The perturb and observe (P&O) technique is used as the MPPT control algorithm. The study proposes to reduce converter output oscillation owing to implemented MPPT control technique with additional PI observer. Furthermore aims to optimize output power using PI voltage mode closed-loop structure.

21 citations


Cites background or methods from "PI Controller based MPPT for a PV S..."

  • ...The Maximum Power Point Tracking (MPPT) controller is popular among the others techniques due to advantages such as suitable, good performance, and easy to apply [5,6]....

    [...]

  • ...Very different methods and techniques are used to eliminate this situation [5]....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a grid connected inverter with a PI controller is proposed to improve the voltage profile of grid connected PV systems, dc voltage regulation across the grid side inverter control and to reduce the distortions under the sudden load changes.

21 citations

Journal Article
TL;DR: The maximum power point tracking (MPPT) technique for increasing the output voltage of the photovoltaic (PV) system is presented and the Simulation result from MATLAB/SIMULINK is presented to verify the performance of the converter.
Abstract: This paper presents the maximum power point tracking (MPPT) technique for increasing the output voltage of the photovoltaic (PV) system. In order to increase the output voltage of the system, boost converter is connected to the PV system. However, when connecting the boost converter to the PV system the voltage value at the output equal to the input voltage. According to the principle of boost converter, output voltage must be higher than the input voltage. The output voltage depends upon the switching frequency and duty cycle of the converter, as to increase the output voltage of the PV system based on boost converter characteristics. The control strategies can be used based on the combination between the Particle Swarm Optimization (PSO) method and the Proportional Integral (PI) controller that strategies can be extract the maximum power from a PV system. The PI Controller is used to tracking the maximum power from the PV panel, at different atmospheric condition. The Solar PV power generation system is comprised several elements like solar panel, DC-DC converter, MPPT Control Strategies and load. The Simulation result from MATLAB/SIMULINK is presented to verify the performance of the converter. Keywords— Photovoltaic (PV) system; Maximum Power Point Tracking (MPPT); DC-DC Boost Converter; Proportional Integral (PI) and Particle Swarm Optimization (PSO).

20 citations


Cites background from "PI Controller based MPPT for a PV S..."

  • ...In general, there is a single point on the V-I or V-P curve is called as MPP, at which the entire PV system operates with maximum efficiency and produces its maximum output power [10]....

    [...]

References
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Journal ArticleDOI
TL;DR: In this article, the authors proposed a method of modeling and simulation of photovoltaic arrays by adjusting the curve at three points: open circuit, maximum power, and short circuit.
Abstract: This paper proposes a method of modeling and simulation of photovoltaic arrays. The main objective is to find the parameters of the nonlinear I-V equation by adjusting the curve at three points: open circuit, maximum power, and short circuit. Given these three points, which are provided by all commercial array data sheets, the method finds the best I-V equation for the single-diode photovoltaic (PV) model including the effect of the series and parallel resistances, and warranties that the maximum power of the model matches with the maximum power of the real array. With the parameters of the adjusted I-V equation, one can build a PV circuit model with any circuit simulator by using basic math blocks. The modeling method and the proposed circuit model are useful for power electronics designers who need a simple, fast, accurate, and easy-to-use modeling method for using in simulations of PV systems. In the first pages, the reader will find a tutorial on PV devices and will understand the parameters that compose the single-diode PV model. The modeling method is then introduced and presented in details. The model is validated with experimental data of commercial PV arrays.

3,811 citations

Journal ArticleDOI
TL;DR: In this article, the perturb and observe (PO) algorithm is used in photovoltaic (PV) systems to maximize the PV array output power by tracking continuously the maximum power point (MPP) which depends on panels temperature and on irradiance conditions.
Abstract: Maximum power point tracking (MPPT) techniques are used in photovoltaic (PV) systems to maximize the PV array output power by tracking continuously the maximum power point (MPP) which depends on panels temperature and on irradiance conditions. The issue of MPPT has been addressed in different ways in the literature but, especially for low-cost implementations, the perturb and observe (PO moreover, it is well known that the P&O algorithm can be confused during those time intervals characterized by rapidly changing atmospheric conditions. In this paper it is shown that, in order to limit the negative effects associated to the above drawbacks, the P&O MPPT parameters must be customized to the dynamic behavior of the specific converter adopted. A theoretical analysis allowing the optimal choice of such parameters is also carried out. Results of experimental measurements are in agreement with the predictions of theoretical analysis.

2,696 citations

Journal ArticleDOI
TL;DR: It is found that the P&O method, when properly optimized, can have MPPT efficiencies well in excess of 97%, and is highly competitive against other MPPT algorithms.
Abstract: Maximum power point trackers (MPPTs) play an important role in photovoltaic (PV) power systems because they maximize the power output from a PV system for a given set of conditions, and therefore maximize the array efficiency. Thus, an MPPT can minimize the overall system cost. MPPTs find and maintain operation at the maximum power point, using an MPPT algorithm. Many such algorithms have been proposed. However, one particular algorithm, the perturb-and-observe (P&O) method, claimed by many in the literature to be inferior to others, continues to be by far the most widely used method in commercial PV MPPTs. Part of the reason for this is that the published comparisons between methods do not include an experimental comparison between multiple algorithms with all algorithms optimized and a standardized MPPT hardware. This paper provides such a comparison. MPPT algorithm performance is quantified through the MPPT efficiency. In this work, results are obtained for three optimized algorithms, using a microprocessor-controlled MPPT operating from a PV array and also a PV array simulator. It is found that the P&O method, when properly optimized, can have MPPT efficiencies well in excess of 97%, and is highly competitive against other MPPT algorithms. Copyright © 2002 John Wiley & Sons, Ltd.

866 citations

Journal ArticleDOI
TL;DR: A novel maximum-power-point-tracking (MPPT) controller for a photovoltaic (PV) energy conversion system is presented, and a single-stage configuration is implemented, resulting in size and weight reduction and increased efficiency.
Abstract: A novel maximum-power-point-tracking (MPPT) controller for a photovoltaic (PV) energy conversion system is presented. Using the slope of power versus voltage of a PV array, the proposed MPPT controller allows the conversion system to track the maximum power point very rapidly. As opposed to conventional two-stage designs, a single-stage configuration is implemented, resulting in size and weight reduction and increased efficiency. The proposed system acts as a solar generator on sunny days, in addition to working as an active power line conditioner on rainy days. Finally, computer simulations and experimental results demonstrate the superior performance of the proposed technique.

714 citations

Proceedings ArticleDOI
20 Jun 2004
TL;DR: In this article, a new implementation of a perturbation and observation (P&O) maximum power point tracking (MPPT) algorithm that can mitigate/reduce the main drawbacks commonly related to the P&O method is discussed.
Abstract: This paper discusses a new implementation of a perturbation and observation (P&O) maximum power point tracking (MPPT) algorithm that can mitigate/reduce the main drawbacks commonly related to the P&O method. This is achieved with peak current control, small perturbation values and sampling of instantaneous values, instead of averaged, to speed up the system response and reduce the oscillations around the maximum power point (MPP). The number of samples per switching cycle, type (synchronized/ unsynchronized) and ideal instant for sampling (maximum or minimum current) are investigated in order to obtain fast calculation of the direction of the next perturbation. Experimental results with the proposed control scheme implemented in a DSP are presented.

235 citations