Yapay Sinir Ağları Kullanarak Üç Seviyeli NPC İnvertörler için Sektör ve Bölge Tahmini

Abstract

Yenilenebilir enerji sistemlerinin en önemli donanım birimi olan inverterlerin performansı, referans gerilim vektörüne bağlı olarak çalıştığı sektör ve bölge değerlerine bağlıdır. Sektör ve bölgenin doğru bir şekilde tespit edilmesi kritik bir öneme sahiptir. Bu çalışma, klasik matematiksel modellere dayalı sektör ve bölge tespitinin eksikliklerini ortadan kaldırmayı amaçlamaktadır. Bu amaç doğrultusunda sektör (6 sınıf) ve bölge (4 sınıf) tespitinin yapay sinir ağları (ANN) mimarileri yardımıyla yüksek doğrulukta tahmin edilmesi sağlanmıştır. Bu kapsamda, Narrow, Medium, Wide, Bilayered ve Trilayered mimari yapıları kullanılmıştır ve sistematik bir şekilde karşılaştırılmıştır. Sektör tespitinde, Narrow NN ve Wide NN %99,97 doğruluk elde ederek en yüksek performansı göstermişlerdir. Bölge tespitinde ise Wide NN %98,81 başarım oranı ile diğer mimari yapılar arasında en yüksek performans değerine sahiptir. Önerilen mimari simülasyon ortamında modellenerek inverter sektör ve bölge, çıkış akım ve gerilim değerleri bakımından incelenmiştir. Simulasyon sonuçları, klasik ve yapay sinir ağları mimarisine dayalı modellerin uyumlu olduğunu ortaya koymakta ve işlem yükünü azaltmaya yönelik bir çözüm sunmaktadır.

Keywords

• Inverter
• sektör ve bölge tespiti
• yapay sinir ağları

Prediction of Sector and Region for Three-Level NPC Inverters Using Artificial Neural Networks

Abstract

The performance of inverters, the most important hardware unit of renewable energy systems, depends on the sector and region values in which they operate in relation to the reference voltage vector. The accurate identification of sectors and regions is crucial. This study aims to overcome the shortcomings of sector and region identification based on classical mathematical models. To this end, the identification of sectors (6 classes) and regions (4 classes) is predicted with highly accuracy using artificial neural network (ANN) architectures. In this context, Narrow, Medium, Wide, Bilayered and Trilayered architectures were used and systematically compared. For sector detection, Narrow NN and Wide NN showed the highest performance with 99.97% accuracy. For region detection, Wide NN has the highest performance among the other architectures with 98.81% accuracy. The proposed architecture is modelled in a simulation environment and analyzed in terms of inverter sector and region, output current and voltage values. The simulation results show that the models based on classical and artificial neural networks are compatible and provide a solution to reduce the processing load.

Keywords

• Inverter
• sector and region
• artificial neural networks

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