Improved variable step size P&amp;O MPPT algorithm for PV systems

Serrano-Guerrero, Xavier; González-Romero, José Luis; Cardenas-Carangui, Xavier; Escrivá-Escrivá, Guillermo

doi:10.1109/upec.2016.8114046

Cited by 21 publications

(18 citation statements)

References 9 publications

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“…The mean values of arc current and voltage were used in simulation when calculating P0 and UC. A variable-step-size MPPT based on the P&O algorithm was adapted in simulation to maintain the maximum output of the PV array [57]. The duty cycle D is determined by the MPPT algorithm.…”

Section: Simulation Setupmentioning

confidence: 99%

Series DC Arc Simulation of Photovoltaic System Based on Habedank Model

Pan

Luo³

et al. 2020

Energies

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Despite the rapid development of photovoltaic (PV) industry, direct current (DC) fault arc remains a major threat to the safety of PV system and personnel. While extensive research on DC fault arc has been conducted, little attention has been paid to the long-time interactions between the PV system and DC arc. In this paper, a simulation system with an arc model and PV system model is built to overcome the inconvenience of the fault-arc experiments and understand the mechanism of these interactions. For this purpose, the characteristics of the series DC arc in a small grid-connected PV system are first investigated under uniform irradiance. Then, by comparing with different arc models, the Habedank model is selected to simulate the fault arc and a method to determine its parameters under DC arc condition is proposed. The trends of simulated arc waveforms are consistent with the measured data, whose fitting degree in adjusted R-squared is between 0.946 and 0.956. Finally, a phenomenon observed during the experiment, that the negative perturbation of the maximum power point tracking (MPPT) algorithm can reduce the arc current, is explained by the proposed model.

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Section: Simulation Setupmentioning

confidence: 99%

Series DC Arc Simulation of Photovoltaic System Based on Habedank Model

Pan

Luo³

et al. 2020

Energies

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“…where λ ¼ dP du is a slope of power to voltage in 1 step width, which can be calculated by Figure 2B and Serrano-Guerrero et al 31 Likewise, the γ point is the left side of the hysteresis band, and the reference voltage and power of γ point can be obtained:…”

Section: Mppt Control Strategymentioning

confidence: 99%

A novel switching boost inverter applied to photovoltaic power generation system

Liu

Wang

Yang³

2018

Circuit Theory & Apps

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This paper presents a new topology of the input current continuous switch boost inverter (ICCSBI) and a perturbation observation with hysteresis comparator method. Because the traditional inverter needs to join the dead time to avoid short circuit, the dead time will cause distortion of the output current. And the traditional inverter is not suitable for photovoltaic power generation because it is a buck converter. The ICCSBI structure improves the booster circuit, which refers to the Z-source inverter. It can get higher voltage than traditional inverter. Meanwhile, the ICCSBI not only retains the advantages of the Z-source inverter but also reduces the number of passive components. In addition, the hysteresis band comparator is added to the perturbation observation method to make the system better robustness at the maximum power point of the photovoltaic system. In the photovoltaic system, to ensure the output current stable, the current control method is added to the ICCSBI. Finial, the experimental results are presented to demonstrate the new topology and control method. KEYWORDS hysteresis band comparator, input current continuous switch boost inverter, maximum power point tracking (MPPT), perturbation observation method, PV system, shoot-through

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“…MPPT enforces the PV system to always work at the maximum power by finding and tracking the maximum power point even when there is a sudden change in power due to the changes on solar irradiance and temperature. MPPT algorithms have been widely discussed and studied [104]- [110]. MPPT techniques are usually applied for DC/DC converters but recently, they have been applied directly to inverters for the purpose of increasing the overall system efficiency.…”

Section: Grid-tied Single-phase Transformer-less Inverter Controlmentioning

confidence: 99%

Highly efficient GaN-based single-phase transformer-less PV grid-tied inverter

Alatawi

Almasoudi

Matin

2017

2017 North American Power Symposium (NAPS)

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Growing energy demand and environmental concerns have led to an increased interest in renewable energy resources to provide a sustainable and low carbon emission energy supply. Among these renewable energy resources, photovoltaic (PV) systems have been the focus of many scientific researchers. The most vital component of a PV system that needs to be improved is the power converter. Grid-tied transformer-less inverters have gained a lot of interest in recent years because of their higher efficiency, reduced volume and lower cost compared to traditional line transformer inverters. This dissertation discusses single-phase transformer-less inverter challenges and provides solutions that could lead to a next generation, high performance, grid-connected, single-phase transformer-less inverter. A new topology with new current paths is proposed to increase efficiency and reduce the leakage current. A comparison study of the proposed topology and multiple transformer-less inverters is carried out in terms of leakage current, power losses and efficiency. This dissertation also investigates the impact of emerging Gallium Nitride (GaN)based power devices on a single-phase transformer-less inverter in terms of efficiency, high switching frequency capability, volume and cooling efforts. GaN device structure, as well as static and dynamic characterization, are discussed. Furthermore, this dissertation studies GaN power devices' reverse conduction capability to provide the proposed inverter with reactive power control. Existing PWM I would like to start by expressing my deepest gratitude and appreciation to my advisor Dr. Mohammad Matin for his support, advice and encouragement throughout this research. His mentorship and experienced guidance helped me strengthen my research skills. His valuable insight, motivation, and enthusiasm were the most important assets that led to the completion of this research. I also would like to express my sincere appreciation to my dissertation committee members: Dr. Wenzhong Gao, Dr. Amin Khodaei, and Dr. Shimelis Assefa for their invaluable suggestions, comments and advice that helped me throughout my research progress. My deepest thanks, gratitude, and respect go to my parents for a lifetime of unfailing love, encouragement, support and patience. Finally, I would like to thank my loving wife for her endless caring, understanding, and patience during my PhD study. vi

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Improved variable step size P&O MPPT algorithm for PV systems

Cited by 21 publications

References 9 publications

Series DC Arc Simulation of Photovoltaic System Based on Habedank Model

Series DC Arc Simulation of Photovoltaic System Based on Habedank Model

A novel switching boost inverter applied to photovoltaic power generation system

Highly efficient GaN-based single-phase transformer-less PV grid-tied inverter

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