Investigation of Power losses on Solar Photovoltaic Array Interconnections Under Mismatch Conditions

G, Sai Krishna; Moger, Tukaram

doi:10.1007/s40866-021-00117-8

Cited by 3 publications

(1 citation statement)

References 34 publications

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“…Está bem documentado na literatura a vasta coleção de métodos para detecção da perda de potência nos sistemas fotovoltaicos. Uma boa parte desses métodos concentramse na detecção de perdas causadas pelo sombreamento parcial e, podem ser dividido aproximadamente em método baseado em analises das curvas P-V ou I-V. O objetivo destes métodos é modelar o impacto do sombreamento parcial em matrizes fotovoltaicas, dependendo do seu padrão (Moger et al, 2021;Kour and Shukla, 2021).…”

Section: Metodologiaunclassified

Efeitos da posição e nível de sombreamento na potência de saída da matriz fotovoltaica

Cláudio A.C. Cambambi,

Luciane N. Canha,

Lucas F. Ramos

et al. 2022

Proceedings IX Simpósio Brasileiro De Sistemas Elétricos

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The power loss in a photovoltaic array under identical partial shading pattern is proportional to the percentage of shading. This makes sense, as the photovoltaic array depends on solar irradiance to generate electrical energy. However, it is tacitly assumed that the maximum power of a partially shaded PV array always decreases as the shading intensity increases. However, although poorly documented, it appears in the literature that this may not be the case. The investigation of the PV characteristic curve under different numbers of shaded modules and percentage of shading suggests that the photovoltaic array becomes insensitive to the percentage of shading when the irradiance of the shaded modules reaches a certain critical point. A seriesconnected and series-parallel photovoltaic array is used in this article. The critical point can vary based on the number of shaded modules, size and configuration of the PV array. Resumo: Um transporte econômico eficiente contribui com o desenvolvimento da economia e a redução de despesas na logística das organizações. Os veículos elétricos oportunizam uma nova alternativa de mobilidade, devido às vantagens relacionadas à redução de ruído no trânsito, diminuição da emissão de gases poluentes e por apresentarem custos menores durante sua operação comparados aos veículos tradicionais. Além de buscar construir uma economia sustentável mediante as recargas realizadas por fontes de energia renovável. Deste modo, o objetivo deste artigo é realizar uma análise da viabilidade econômica com a inserção de veículos elétricos em órgãos públicos. O presente estudo tende a desenvolver uma avaliação econômica com abastecimento e manutenção de frotas e pontuar os benefícios ao meio ambiente no que tange à substituição de veículos a combustão por elétricos. O estudo é baseado nas informações coletadas em uma Prefeitura localizada no Estado do Rio Grande do Sul. A análise de cada critério visa evidenciar que o processo de substituição da frota de veículos pode ser uma alternativa viável para as organizações públicas, devido a economia gerada durante sua operação e a diminuição na emissão de poluentes.

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Section: Metodologiaunclassified

Efeitos da posição e nível de sombreamento na potência de saída da matriz fotovoltaica

Cláudio A.C. Cambambi,

Luciane N. Canha,

Lucas F. Ramos

et al. 2022

Proceedings IX Simpósio Brasileiro De Sistemas Elétricos

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Optimized Performance and Economic Assessment for Hybrid Island Microgrid System Considering Uncertainties

Shufian

Hoque²,

Kabir

et al. 2022

Technol Econ Smart Grids Sustain Energy

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Distributed energy resources (DER) based microgrid system integration over conventional grids at remote or isolated locations has many potential benefits in minimizing the effects of global warming. However, this emerging microgrid technology brings challenges such as high capital costs, stable performance, uncertainties, operation, maintenance, and management issues. This research introduces an island microgrid system with a correlation of PV/wind/biomass/electrolyzer/hydrogen storage/fuel cell/diesel generator. The suggested hybrid system is assessed based on the different natural uncertainties of the DER, considering the availability of wind speed, solar irradiation, and biomass fuels. Optimized electricity production and possible economic interpretation of the microgrid system are revealed. Day-ahead forecast generation and load demand dispatch analysis related to various uncertainties are estimated and calculated by the net load demand forecasting approach. With the help of optimal power dispatch scheduling, the day-ahead generation and load demand uncertainties are effectively handled. A few plausible case studies bespeak the suitability of the suggested island microgrid system in different environmental situations where the national grid is unavailable. The real-time simulation of the proposed model amplifies the feasibility of generation synchronization with load demand. KeywordsBangladesh • Bhasan char • Economic assessment • Electrolyzer • Hydrogen storage • Hybrid island microgrid • Optimized performance and uncertainty analysis • PV/Wind/Biomass/Fuel cell

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Performance Analysis of Interconnection and Differential Power Processing Techniques under Partial Shading Conditions

Gouvêa,

Castro,

de Souza

2024

Energies

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Partial shading conditions can cause low output power, hotspots, and a reduced lifespan in photovoltaic arrays. Interconnection (IC) and differential power processing (DPP) can be used to mitigate these effects. When individually applied to an array, these techniques can significantly increase the generated power. A few authors studied the combined use of these schemes under specific conditions such as large-scale arrays or a complex combination of several techniques, making it difficult to identify the individual contribution of each technique. Here, we aimed to determine whether the combined use of a switching-inductor DPP circuit and a total-cross-tied interconnection scheme presents better performance than each standalone technique, using a small-scale photovoltaic array. An array was tested using IC, DPP, and a combination of both techniques, and the array was subjected to 13 shading patterns and two irradiance levels. The performance in each case was assessed using maximum output power, performance ratio, mismatch power loss, and power enhancement indicators. The results showed that a standalone differential power processing circuit presents better performance than when it is combined with an interconnection. The DPP showed performance ratio values of up to 97%, mismatch power losses lower than 36.9%, and a power enhancement of up to 95.9%. The standalone interconnection shows the worst performance among the three techniques.

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Investigation of Power losses on Solar Photovoltaic Array Interconnections Under Mismatch Conditions

Cited by 3 publications

References 34 publications

Efeitos da posição e nível de sombreamento na potência de saída da matriz fotovoltaica

Efeitos da posição e nível de sombreamento na potência de saída da matriz fotovoltaica

Optimized Performance and Economic Assessment for Hybrid Island Microgrid System Considering Uncertainties

Performance Analysis of Interconnection and Differential Power Processing Techniques under Partial Shading Conditions

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