PV Modüller/Hücrelerin Tek-Diyot Eşdeğer Devre Parametrelerinin Kestirimi İçin Yeni Bir Analitik Model

Abstract

Bu çalışmada PV modüller için tek-diyot eşdeğer devre parametrelerinin belirlenmesine ilişkin analitik bir model önerilmektedir. Çalışmada ilk olarak literatürde mevcut çok sayıda PV modüller için kısa devre akımı (Isc) ve foton akımı (Ipv) değerleri kullanılarak eğri uydurma yöntemi ile akımlar arasında bir matematiksel bağıntı oluşturulmuştur. Daha sonra, akımlar arasında geliştirilen bu bağıntı eşdeğer devre denklemlerinde kullanılarak 3 bilinmeyenli (Rp, Rs ve a) denklem sisteminden oluşan analitik model geliştirilmiştir. Yapılan analizler, model ile elde edilen eşdeğer devre parametrelerinin ve sonucunda oluşturulan I-V ve P-V karakteristiklerinin deneysel veriler ile çok büyük oranda örtüştüğünü göstermektedir. Bu nedenle hesaplanan ve gerçek veriler arasındaki Hatanın Ortalama Karekökü (RMSE) ve Belirleme Katsayısı (R2) değerleri ihmal edilebilir düzeyde bulunmuştur. Ayrıca modelin diğer yöntemlere göre parametre kestiriminde kullanım kolaylığı, deneysel verilere daha az ihtiyaç duyma ve tüm parametreleri belirleyebilme gibi avantajları olduğunu söylemek mümkündür.

Keywords

• Eğri uydurma
• matematiksel model
• PV Modülü/Hücresi
• parametre kestirimi

Kaynakça

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