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Analysis of institutional authors

Ye DAuthorRiquelme-Dominguez J.m.AuthorMartinez S.Corresponding Author

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May 23, 2022
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Estimation of the Output Characteristic of a Photovoltaic Generator under Power Curtailment and Considering Converter Losses

Publicated to: Electronics. 11 (10): 1544- - 2022-05-01 11(10), DOI: 10.3390/electronics11101544

Authors:

Ye, DH; Riquelme-Dominguez, JM; Martinez, S
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Affiliations

Univ Politecn Madrid, Dept Elect Engn, ETSI Ind, Madrid 28040, Spain - Author
Universidad Politécnica de Madrid - Author

Abstract

Power curtailment methods contribute to the frequency stability of power systems with a high share of photovoltaic generation. This paper focuses on an online strategy that estimates the output characteristic of a photovoltaic generator while operating in power curtailment mode by using voltage and current measurements and the nonlinear least-squares curve-fitting. In contrast to previously reported methods, this work introduces an improvement consisting of the estimation of the power losses of the electronic converter that connects the photovoltaic panel with the grid. Thus, the impact of a mismatch between the dc-side and the ac-side is reduced. The procedure is tested at different power levels and with fluctuations of irradiance and temperature. The results show that the converter efficiency, expressed as an exponential function with two quadratic equations, is associated with irradiance and temperature. It is also found that the two-stage converter efficiency is mainly affected by the irradiance level when the photovoltaic system operates on the left side of the power-voltage characteristic. In contrast, the temperature level influences the converter efficiency significantly when working on the right side of the maximum power point. The estimated efficiency curves can improve the accuracy of the power curtailment method and can be used for designing the two-stage converter. The effectiveness of the proposed power curtailment method has been tested in a two-stage photovoltaic system through MATLAB/Simulink.
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Keywords

control strategygrid-connected power systemmodelnonlinear least-squares curve-fittingphotovoltaic (pv)power curtailment methodAffordable and clean energyConverter efficiencyGrid-connected power systemNonlinear least-squares curve-fittingPhotovoltaic (pv)Point trackingPower curtailment method

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Electronics due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2022, it was in position 72/160, thus managing to position itself as a Q2 (Segundo Cuartil), in the category Physics, Applied. Notably, the journal is positioned en el Cuartil Q2 para la agencia Scopus (SJR) en la categoría Electrical and Electronic Engineering.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2026-04-25:

  • Google Scholar: 1
  • WoS: 2
  • Scopus: 3
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-25:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 8 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

    It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

    • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
    • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/86523/

    As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

    • Views: 158
    • Downloads: 89
    Continuing with the social impact of the work, it is important to emphasize that, due to its content, it can be assigned to the area of interest of ODS 7 - Affordable and clean energy, with a probability of 88% according to the mBERT algorithm developed by Aurora University.
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    Leadership analysis of institutional authors

    There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (YE, DONGHUI) and Last Author (MARTINEZ GONZALEZ, SERGIO).

    the author responsible for correspondence tasks has been MARTINEZ GONZALEZ, SERGIO.

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    Project objectives

    La aportación persigue los siguientes objetivos: analizar el comportamiento de un generador fotovoltaico bajo régimen de limitación de potencia mediante mediciones de voltaje y corriente; estimar las pérdidas de potencia en el convertidor electrónico que conecta el panel fotovoltaico con la red; caracterizar la eficiencia del convertidor en función de la irradiancia y la temperatura mediante funciones exponenciales y ecuaciones cuadráticas; evaluar el impacto de la irradiancia y temperatura en la eficiencia del convertidor en diferentes puntos de operación respecto al máximo punto de potencia; validar la estrategia propuesta en un sistema fotovoltaico de dos etapas mediante simulaciones en MATLAB/Simulink; y mejorar la precisión de los métodos de limitación de potencia para el diseño de convertidores.
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    Most relevant results

    El estudio presenta una estrategia online para estimar la característica de salida de un generador fotovoltaico en modo de reducción de potencia, incorporando la estimación de pérdidas del convertidor electrónico. Se identificó que la eficiencia del convertidor, modelada mediante una función exponencial con dos ecuaciones cuadráticas, depende de la irradiancia y la temperatura. Se determinó que la eficiencia del convertidor de dos etapas está principalmente influenciada por la irradiancia en el lado izquierdo de la curva potencia-voltaje y por la temperatura en el lado derecho del punto de máxima potencia. La metodología fue validada bajo diferentes niveles de potencia y condiciones variables de irradiancia y temperatura mediante simulaciones en MATLAB/Simulink.
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