Review and qualitative analysis of submodule-level distributed power electronic solutions in PV power systems

Khan, Omair; Xiao, Weidong

doi:10.1016/j.rser.2017.03.073

Cited by 46 publications

(38 citation statements)

References 72 publications

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“…Furthermore, distributed DC-DC converters do not make possible the reversing of voltages at the three sub-module terminals and any hot-spotting phenomena on PV-cells are strongly mitigated. The effectiveness of this kind of architecture was already fully studied and demonstrated in some previous papers [8][9][10][11].…”

Section: Maximum Power Point Trackers (Mppt) Distributed At the Sub-pmentioning

confidence: 90%

“…One of the most effective way for coping with partial shading issues is that of introducing power optimizers (MPPTs) distributed at the sub-PV-module level [8][9][10][11]; they are theoretically able to catch the maximum available power of each sub-module. Furthermore, by replacing bypass diodes, they prevent the reversing of the sub-module voltage also in case of a critical partial shading, so avoiding hot-spotting on partially shaded PV-cells.…”

Section: Maximum Power Point Trackers (Mppt) Distributed At the Sub-pmentioning

confidence: 99%

“…In this contest, active distributed maximum power point trackers (DMPPT) have been also widely introduced and studied [6][7][8][9][10][11]. These optimizers, usually, are DC/DC boost or buck/boost power electronic converters, which can be dedicated to a single PV-module to make it independent from other of the same PV-string; therefore, they are theoretically able to catch the maximum power point (MPP) of each PVmodule and of the whole PV-string.…”

Section: Introductionmentioning

confidence: 99%

“…Recently DMPPTs was proposed to be introduced also at the sub-PV-module level for further reducing both power generation losses and hot-spotting issues of shaded PV-cells also under critical partial shadings (i.e. shading of only a few number of PV-cells of the same module) [8][9][10][11]. In practice for each commercial PV-module it has been proposed to introduce, directly within the junction box of the PV-module, three independent small power DC/DC converters for reducing the number of the series connected PV-cells whose generated power can be independently optimized; the effectiveness of this proposal was demonstrated also by means of experiments.…”

Section: Introductionmentioning

confidence: 99%

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Experimenting a distributed passive MPPT based on mini-battery-packs to cope with short-term critical partial shadings on PV-generators

Carbone¹,

Maiolo²

2018

MMC_B

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The common use of by-pass diodes, to contain power generation losses and to avoid "hotspot" phenomena in presence of short-term, repetitive and critical partial shadings on a PVfield, is experimentally investigated, for demonstrating that bypass diodes are not the optimum choice. Active distributed maximum power point trackers (DMPPTs) can offer a better solution; nevertheless, they are based on complex circuitries and control algorithms, with a reduced reliability and additional power losses. In this contest, the aim of the paper is to present and discuss experimental results obtained by testing a homemade PVgenerator prototype in which only a wisely designed and distributed mini-storage based on commercial rechargeable batteries is introduced, to be employed as a "passive" DMPPT, without any active DC/DC converter. The prototype is also experimented to make a comparative performance analysis (i) without bypass diodes, (ii) with bypass diodes and (iii) by introducing our mini-battery-pack, under identical partial shadings, artificially caused and characterized by different degrees of criticality. Experiments demonstrate that wisely designed distributed mini-battery-packs, based on commercial rechargeable batteries, can effectively operate as a passive DMPPT able to cope with short-term critical partial shadings for avoiding "hot-spot" issues and for guaranteeing a significant improvement of the net generated power together with the conventional storage task.

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Section: Maximum Power Point Trackers (Mppt) Distributed At the Sub-pmentioning

confidence: 90%

Section: Maximum Power Point Trackers (Mppt) Distributed At the Sub-pmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimenting a distributed passive MPPT based on mini-battery-packs to cope with short-term critical partial shadings on PV-generators

Carbone¹,

Maiolo²

2018

MMC_B

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“…No mismtaching Mismatching In addition to developing advanced MPPT algorithms, an alternative is to directly mitigate the local peaks under partial shading. Differential power processing (DPP) converters [20][21][22][23][24][25] are typical representatives, that enable each PV module to produce maximum output power. DPP converters eliminate the problem of multiple maximas in the PV string, as highlighted in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Interconnection Configuration Schemes for PV Modules with Switched-Inductor Converters under Partial Shading Conditions

et al. 2019

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Partial shading on photovoltaic (PV) arrays reduces the overall output power and causes multiple maximas on the output power characteristics. Due to the introduction of multiple maximas, mismatch power losses become apparent among multiple PV modules. These mismatch power losses are not only a function of shading characteristics, but also depend on the placement and interconnection patterns of the shaded modules within the array. This research work is aimed to assess the performance of 4 × 4 PV array under different shading conditions. The desired objective is to attain the maximum output power from PV modules at different possible shading patterns by using power electronic-based differential power processing (DPP) techniques. Various PV array interconnection configurations, including the series-parallel (SP), total-cross-tied (TCT), bridge-linked (BL), and center-cross-tied (CCT) are considered under the designed shading patterns. A comparative performance analysis is carried out by analyzing the output power from the DPP-based architecture and the traditional Schottky diode-based architecture. Simulation results show the gain in the output power by using the DPP-based architecture in comparison to the traditional bypassing diode method.

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A Switched-Capacitor-Based Multilevel Converter for Photovoltaic Systems Suffering from Power Mismatch

Fang¹,

Chen²,

Zhou³

et al. 2022

Lecture Notes in Electrical Engineering

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Review and qualitative analysis of submodule-level distributed power electronic solutions in PV power systems

Cited by 46 publications

References 72 publications

Experimenting a distributed passive MPPT based on mini-battery-packs to cope with short-term critical partial shadings on PV-generators

Experimenting a distributed passive MPPT based on mini-battery-packs to cope with short-term critical partial shadings on PV-generators

Evaluation of Interconnection Configuration Schemes for PV Modules with Switched-Inductor Converters under Partial Shading Conditions

A Switched-Capacitor-Based Multilevel Converter for Photovoltaic Systems Suffering from Power Mismatch

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