Modeling and Performance Analysis of Grid Tied Photovoltaic Panel/Battery System Feeding Linear Loads on Complete/Partial Shading Conditions

Öz

The use of renewable energy sources has been increasing rapidly in recent years. As a result of this situation, PV panels are encountered in many applications in daily life. The performance of PV systems is greatly influenced by factors such as the environment and the weather. Examples include shading or partial shading conditions due to clouding, dusting and snow that cause PV systems not to operate at maximum power points. In this study, in order to analyze the results of these conditions modelling of a grid connected PV/Battery system feeding linear loads was performed. The proposed system simulated via PSCAD and the performance analysis of the system under different shading scenarios was conducted. As a result of simulation studies, it is observed that perturb and observe (P&O) algorithm used for maximum power point tracking was stuck at local maximum power points and the PV system operated at low efficiency. 

Anahtar Kelimeler

• Photovoltaic,Battery,Partial shading,Maximum power point tracking

Doğrusal Yükleri Besleyen Şebeke Bağlantılı PV/Akü Sisteminin Tasarımı ve Tam/Kısmi Gölgelenme Durumlarında Performans Analizi

Öz

Yenilenebilir enerji kaynaklarının kullanımı son yıllarda hızla artmaktadır. Bu durum sonucunda PV paneller ile günlük hayatta birçok uygulamada karşılaşılmaktadır. PV sistemlerin performansı çevre ve hava durumu gibi etmenlerden büyük oranda etkilenmektedir. Buna örnek olarak bulutlar, tozlanma, kar gibi nedenlerle meydana gelen gölgelenme veya kısmi gölgelenme durumlarının PV sistemlerin maksimum güç noktalarında çalışmasına neden olması gösterilebilir. Bu çalışmada bu durumun sonuçlarını incelemek üzere şebeke bağlantılı ve doğrusal yükleri besleyen bir PV/Akü sisteminin modellemesi yapılmıştır. Önerilen sistemin PSCAD ile benzetim çalışmaları yapılmış ve farklı gölgelenme senaryoları için performansı incelenmiştir. Benzetim çalışmaları sonucunda PV sistemin maksimum güç noktası izlemesi (MPPT) için kullanılan hata & gözlem (P&O) algoritmasının PV sistemin yerel maksimum noktalarında takılıp düşük verimle çalıştığı gözlenmiştir. 

Anahtar Kelimeler

• Fotovoltaik,Akü,Kısmi gölgelenme,Maksimum güç noktası izleme

Kaynakça

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