Space State Matrices Based Novel PI and Sliding Mode Controllers for Step-Up Converters in Renewable Energy Applications

Year 2019, Issue: 16, 841 - 854, 31.08.2019

Davood Ghaderi

https://doi.org/10.31590/ejosat.590831

Abstract

Photovoltaic panels generate a limited amount of power, so the transmission of this power to the grid side should be done by an efficient DC-DC converter structure and a powerful controller circuit. The controller should be designed based on accurate mathematical analysis to act with high quality and use the minimum number of components as much as possible in order to obtain a cheap and simple topology. In this study, the performance analysis of a novel proportional-integral (PI) controller and Sliding Mode Controller (SMC) methods for a DC-DC power boost converter is examined in Continuous Conduction Mode (CCM). Having a comprehensive mathematical model for the converter allows designing an accurate controller. So, in the first step, an exhaustive model for this converter based on steady space matrixes has been presented. In the next step, these two different controllers investigated based on the proposed model of the boost converter and finally, comparisons for the performance analysis of presented controllers have been done. One of the novelty aspects of the PI controller is that it will give sample currents of the inductor to make a relation between the output voltage and the controller strategy in order to generate suitable pulses to drive the power switch and SMC does not need to any sampling for this purpose and acts through tracking the output voltage.

Keywords

PI controller, Sliding Mode Controller, Renewable energu sources, Step-Up converter, Space state analysis

Yenilenebilir Enerji Uygulamalarında Yükseltici DA DA Dönüştürücüler için Uzay Durum Matrislerine Dayalı yeni PI ve Kayan Kipli Modu Kontrolörler

Abstract

Bir Fotovoltaik (PV)
panelin üretilen güç miktarının belli bir limitleri aşabilmemesi ve sınırlı
olmasını bilmekle birlikte, yenilenebilir energy kaynaklarında verimin son
derece önemli olduğu nedeniyle kontrol devresinin performansı oldukça
önemlidir. Bu enerjinin aktarımı kaliteli kontrol algoritmalarına dayanarak, kayıpları
en az değerlere düşürebilmek için farklı çalışmalarda dikkate alınmıştır. Bu
çalışmada, DA-DA Boost dönüştürücüsü için uzay durumu matrislerini
geliştirerek, yeni Orantılı İntegral (PI) ve Kayan Kipli Modu (SMC) tabanlı
Kontrolör yöntemlerinin performans analizi dönüştürücünün Sürekli İletim
Modunda (CCM) incelenmiştir. Dönüştürücü için kapsamlı bir matematiksel model
elde etmek, doğru bir kontrol sisteminin tasarlanmasına yol açmabilmektedir.
Böylece, ilk adımda, sabit uzay matrislerine dayanan matimatik modelleme
yöntemleriyle, dönüştürücünün çıkış gerilimi ve giriş akımı için kapsamlı bir
model sunulmuştur. Bir sonraki adımda, bu iki farklı kontrolör, sunulan modele
dayanarak, araştırılmış ve son olarak, sunulan kontrolörlerin performans analizi
için karşılaştırmalar yapılmıştır. Bu iki yeni modele göre, SMC metodu daha iyi
sonuçlar sunmaktadır.

Keywords

PI controller, Sliding Mode Controller, Renewable energu sources, Step-Up converter, Space state analysis

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