Photovoltaic module cascaded converters for distributed maximum power point tracking: a review

Al-Smadi, Mohammad K.; Mahmoud, Yousef

doi:10.1049/iet-rpg.2020.0582

Cited by 12 publications

(3 citation statements)

References 99 publications

(194 reference statements)

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“…The string inverter for grid-tied connection is shown in Figure 3. When each PV module is coupled to a micro-converter, the dc-link voltage of the grid-tied inverter is regulated to a fixed value to increase the efficiency and reduce the cost of the inverter [9,19,27]. The inverter is connected to the grid via an LC filter, with the scope of filtering current harmonics.…”

Section: Conditionmentioning

confidence: 99%

“…This mismatching issue is handled efficiently by using PV module integrated electronics [7], such as dc-dc module integrated converters (micro-converters), or dc-ac module integrated converters (micro-inverters) [8]. These PV module-level architectures are known as distributed maximum power point tracking (MPPT) PV systems [9,10]. For micro-converters, which are of interest to this work, [11] estimated that they can increase the yearly energy yield of a PV system up to 6%, recovering, on average, 36% of the power otherwise lost from partial shading.…”

Section: Introductionmentioning

confidence: 99%

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Seamless Start-Up of a Grid-Connected Photovoltaic System Using Module-Integrated Micro-Converters

Callegaro,

Uong,

Deilami

2023

Energies

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In traditional grid-tied photovoltaic (PV) installations, when partial shadowing occurs between different PV modules in a string, bypass diodes short-circuit the output terminals of shadowed modules, and the whole system forgoes their potential energy production. This loss can be recovered if a dc-dc converter (micro-converter) is coupled to every PV module, and operated at the maximum power point (MPP). In this scenario, without communication links between the distributed micro-converter and the grid-tied inverter, a start-up procedure must be carefully designed to seamlessly allow the system to transfer PV power to the grid. During this phase, potentially damaging over-voltages and abrupt transients occurring at the micro-converters/inverter interface must be avoided. In this paper, the control algorithm of each micro-converter is enhanced to provide a smooth start-up operation so that PV units can safely start transferring power to the inverter and the grid. Improving from previous works, the proposed control technique is simple and removes the need for current sensors at the output of each micro-converter and at the inverter dc-link, with an economical advantage. Simulation results demonstrate the successful system start-up behavior, whilst confirming the benefits of the proposed control technique. First, the dc-link is energized from the rectified grid voltage. Then, the micro-converters raise the dc-link voltage so that the available PV power is transferred to the grid, with this sequence of operations not causing any abrupt electrical transient. The results also demonstrate the robust behavior of the PV system under non-uniform solar irradiation conditions.

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Section: Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seamless Start-Up of a Grid-Connected Photovoltaic System Using Module-Integrated Micro-Converters

Callegaro,

Uong,

Deilami

2023

Energies

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“…In this study, a boost converter is used, and each converter is equipped with MPPT tracking capability to extract maximum power at the sub-module level. The working principle of the boost converter is given in [50,51].…”

Section: Power Optimizersmentioning

confidence: 99%

Performance Assessment of Mismatch Mitigation Methodologies Using Field Data in Solar Photovoltaic Systems

et al. 2022

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Partial shading and other non-ideal conditions cause electrical mismatches that reduce the output power generated by a photovoltaic (PV) system. It affects the overall performance and efficiency of PV systems. Therefore, a model is developed in MATLAB, which analyses the performance of the PV systems under real irradiance profiles and temperatures for various available mismatch mitigation methodologies, i.e., bypass diode, DC power optimizer, and differential power processing (DPP). More specifically, this study will help to understand the best mismatch reduction methodologies for a solar PV system under different scenarios. The results also are validated by comparing them with a similar PV system installed in SolarTechLAB, which also operates under the same irradiance and temperature conditions under which these models are tested. This study also presents novel results, covering discussions on the reverse voltage distribution under mismatch scenarios among bypass diode, DC power optimizer, and DPP techniques.

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Two-part power referencing for an efficient serially coordinated distributed flexible power point tracking of photovoltaic plants

Sarkar,

Kolakaluri

2025

Renewable Energy

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Photovoltaic module cascaded converters for distributed maximum power point tracking: a review

Cited by 12 publications

References 99 publications

Seamless Start-Up of a Grid-Connected Photovoltaic System Using Module-Integrated Micro-Converters

Seamless Start-Up of a Grid-Connected Photovoltaic System Using Module-Integrated Micro-Converters

Performance Assessment of Mismatch Mitigation Methodologies Using Field Data in Solar Photovoltaic Systems

Two-part power referencing for an efficient serially coordinated distributed flexible power point tracking of photovoltaic plants

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