An improved maximum power point tracking method for photovoltaic systems

Tafticht, T.; Agbossou, Kodjo; Doumbia, Mamadou Lamine; Chériti, A.

doi:10.1016/j.renene.2007.08.015

Cited by 173 publications

(68 citation statements)

References 13 publications

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“…As the conventional P&O algorithm is simple and easy for implementation it has been widely used in many applications (Mellit, Rezzouk, Messai, & Medjahed, 2011;Tafticht, Agbossou, Doumbia, & Cheriti, 2008). But the drawback is its incapacity to as certain whether the increase in power occurs due tothe change in insolation or change in duty cycle.…”

Section: Introductionmentioning

confidence: 99%

<b>Impact of modified perturb and observe control on MPPT of PV/battery fed three - port DC‐DC converter

Mahendran

Ramaprabha

2017

Acta Sci. Technol.

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ABSTRACT. This paper presents the modified perturb and observe (P&O) maximum power point tracking (MPPT) method for photovoltaic (PV) fed three-port DC-DC converter in PV/battery hybrid system. The proposed MPPT technique reduces the drift problem which occurs in the conventional MPPT methods by including the data of change in current (ΔI) in addition to the data used in the conventional P&O algorithm. The drift phenomenon and its effects are clearly demonstrated in this paper. The ability of the proposed P&O method to address this issue is proved by comparing the conventional P&O algorithm in different modes of operation. The performance assessment includes peak overshoot, settling time, MPP ratio and stability. The experimental validation was implemented using DSPIC30F4011 microcontroller. From the analysis and results, it could be seen that the modified P&O showed better performance in terms of accuracy in tracking the maximum power, less tracking time, high MPP ratio and reduced drift in the changing weather conditions. Keywords: current-voltage characteristics, DC-DC power converters, drift, photovoltaic systems, power demand, pulse width modulation.Impacto da modificação perturbar e observar de controle na MPPT de PV / bateria fed Três -port conversor DC-DC RESUMO. Este artigo apresenta o método de monitoramento de ponto de potência máximo (MPPT) modificado e observado (P&O) para o conversor DC-DC de três portas alimentado por energia fotovoltáica (PV) no sistema híbrido PV/bateria. A técnica MPPT proposta reduz o problema de deslocamento (drift) que ocorre nos métodos MPPT convencionais, incluindo os dados de mudança na corrente (ΔI), além dos dados usados no algoritmo P&O convencional. O fenômeno do deslocamento (drift) e seus efeitos estão claramente demonstrados neste artigo. A capacidade do método de P&O proposto para resolver este problema é comprovado comparando com o algoritmo de P&O convencional em diferentes modos de operação. A avaliação de desempenho inclui o superávit do pico, tempo de estabilização, relação de MPP e estabilidade. A validação experimental foi implementada usando o microcontrolador DSPIC3o30F4011. A partir da análise e dos resultados, verificou-se que o P&O modificado mostrou melhor desempenho em termos de precisão no rastreamento da potência máxima, menor tempo de rastreamento, alta relação de MPP e deslocamento reduzido nas condições climáticas em constante mudança.Palavras-chave: características corrente-tensão, conversores de potência DC-DC, deslocamento, sistemas fotovoltáicos, demanda de energia, modulação de largura de pulso.

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Section: Introductionmentioning

confidence: 99%

<b>Impact of modified perturb and observe control on MPPT of PV/battery fed three - port DC‐DC converter

Mahendran

Ramaprabha

2017

Acta Sci. Technol.

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“…Therefore, MPPT controlled DC-DC converters are used to increase the energy conversion efficiency of PV modules. In this context, there are many algorithms and methods presented in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…This additional measurement increases the cost and complexity of hardware. Furthermore, accuracy of these methods is low compared with hill-climbing based methods [4][5][6]. When it comes to look-up table-based methods [7], such as fuzzy logic and neural network techniques [8][9][10], they have relatively quick response under sudden changes in environmental factors.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, even if short circuit current or open circuit voltage measurement-based algorithms come up with a convergence time problem, energy loss and hardware complexity increase. Furthermore, MPPT accuracy is very low in these approaches due to variable coefficients based on environmental factors [4][5][6][15][16][17][18]. This paper proposes a new approach in order to manage MPPT operation in an efficient way to reduce convergence time.…”

Section: Introductionmentioning

confidence: 99%

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An improved incremental conductance based MPPT approach for PV modules

Başoğlu¹,

Çakır²

2015

Turk J Elec Eng & Comp Sci

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This paper presents a new maximum power point tracking (MPPT) method based on an incremental conductance (IC) algorithm, constant voltage, and look-up table approach. Convergence time, one of the indicators of MPPT quality, is considered for improving MPPT performance of photovoltaic (PV) modules. In this context, a novel hybrid MPPT approach has been proposed. This proposed method consists of three stages. In the first stage, the value of load resistance is calculated. Then the initial operation point of the PV module is determined by using the constant voltage method or look-up table approach. An IC algorithm is used in order to increase MPPT accuracy in the last stage.One of the novelties of this proposed approach is the determination criterion related to sample numbers of PV module current or solar irradiance. With the help of this approach, the initial operation point of the PV module is optimized before MPPT starts. Thus, convergence time is reduced. In this paper, a DC-DC boost converter has been designed to show the performance of the proposed approach. Then the proposed approach is compared with an IC algorithm.Experimental results show that the performance of the proposed approach is better than that of the IC algorithm in terms of convergence time. On the other hand, since the proposed approach is convenient for reducing convergence time, it can be used instead of variable step size algorithms. Furthermore, there are no topological constraints in the proposed approach. Therefore, this method can be easily applied to other converter topologies for low power or microconverter (module-based converter)-based applications.

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“…They can include evolutionary algorithms, swarm optimization algorithms and others [14]. There are also algorithms that use a combination of active and passive methods in order to improve the properties of maximum power point search algorithms [21]. An occurrence of shading on the panel surfaces is a negative phenomenon, which makes the task of obtaining the maximum available power difficult.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Maximum Power Point Search Method Using Temperature Measurements in Partial Shading Conditions

Mroczka¹,

Ostrowski²

2014

Metrology and Measurement Systems

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Photovoltaic panels have a non-linear current-voltage characteristics to produce the maximum power at only one point called the maximum power point. In the case of the uniform illumination a single solar panel shows only one maximum power, which is also the global maximum power point. In the case an irregularly illuminated photovoltaic panel many local maxima on the power-voltage curve can be observed and only one of them is the global maximum. The proposed algorithm detects whether a solar panel is in the uniform insolation conditions. Then an appropriate strategy of tracking the maximum power point is taken using a decision algorithm. The proposed method is simulated in the environment created by the authors, which allows to stimulate photovoltaic panels in real conditions of lighting, temperature and shading.

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An improved maximum power point tracking method for photovoltaic systems

Cited by 173 publications

References 13 publications

<b>Impact of modified perturb and observe control on MPPT of PV/battery fed three - port DC‐DC converter

<b>Impact of modified perturb and observe control on MPPT of PV/battery fed three - port DC‐DC converter

An improved incremental conductance based MPPT approach for PV modules

A Hybrid Maximum Power Point Search Method Using Temperature Measurements in Partial Shading Conditions

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