Robust and accurate photoelectric system model design using the small-signal principle

Year 2023, Issue: 47, 79 - 84, 31.01.2023

Aissani Siham , Mohcene Bechouat , Moussa Sedraoui Toufik Amieur

https://doi.org/10.31590/ejosat.1244942

Abstract

Due to the importance of modeling and the urgent need for it in various applications, the design of an accurate model that simulates and is compatible with the real system to carry out various studies correctly, this has become a great challenge for researchers. Therefore, this research proposes the design of a mathematical model using the method of the small signal of the photovoltaic system consisting of the photovoltaic panel KC200GT feeding the load Through a DC-DC converter. This modeling method converts the mathematical model of the DC-DC converter from nonlinear behavior to linear behavior given in the state space formula, then the application of the Laplace transform will be used to obtain the transfer function. The latter is used in the studies to design the MPP controller. The simulation results showed that the modeling method based on the small signal method enables us to obtain an efficient and accurate model that is compatible with the real system and shows this compatibility in the voltage and energy between them.

Keywords

PV paneli, DC-DC Boost dönüştürücü, Maksimum Güç Noktası İzleme MPPT, küçük sinyal, küçük sinyal

Robust and accurate photoelectric system model design using the small-signal principle

Abstract

Modellemenin önemi ve çeşitli uygulamalarda acil ihtiyaç duyulması nedeniyle, çeşitli çalışmaları doğru bir şekilde yürütmek için gerçek sistemle uyumlu ve simüle eden doğru bir modelin tasarımı, araştırmacılar için büyük bir zorluk haline gelmiştir. Bu nedenle, bu araştırma, yükü DC-DC dönüştürücü aracılığıyla besleyen fotovoltaik panel KC200GT'den oluşan fotovoltaik sistemin küçük sinyal yöntemini kullanarak matematiksel bir modelin tasarımını önermektedir. Bu modelleme yöntemi, DC-DC dönüştürücünün matematiksel modelini doğrusal olmayan davranıştan durum uzayı formülünde verilen doğrusal davranışa dönüştürür, ardından transfer fonksiyonunu elde etmek için Laplace dönüşümünün uygulanması kullanılır. İkincisi, MPP denetleyicisini tasarlamak için çalışmalarda kullanılır. Simülasyon sonuçları, küçük sinyal yöntemine dayalı modelleme yönteminin, gerçek sistemle uyumlu, verimli ve doğru bir model elde etmemizi sağladığını ve bu uyumluluğu aralarındaki voltaj ve enerjide gösterdiğini göstermiştir.

Keywords

PV paneli, DC-DC Boost dönüştürücü, Maksimum Güç Noktası İzleme MPPT, küçük sinyal

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