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Journals / Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi / 2026 / Cilt: 25 Sayı: 3

Implementation of an ANN based Controllers for Three Phase NPC Grid Connected PV Inverter

Üç Fazlı NNK Şebeke Bağlantılı Fotovoltaik Eviriciler için YSA Tabanlı Kontrolörlerin Uygulanması

Yunus Emre Yağan(Kütahya Dumlupınar Üniversitesi)0000-0002-1523-0306
Kadir Vardar(DUMLUPINAR ÜNİVERSİTESİ)0000-0002-0197-0215
Pages
544–557
Publication Date
2025-06-10
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Laboratory tests are carried out with a 9kVA 3-phase NPC inverter circuit.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, an Artificial Neural Network-based Current Controller (ANN-CC) and an ANN-based Capacitor Voltage Balancer (ANN-CVB) for a three-phase three-level Neutral Point Clamped (NPC) single-stage and transformerless grid-connected Photovoltaic (PV) inverter system is designed.
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Key Findings & Data:The performances of ANN controllers and classical controllers have been comparatively tested both in the simulation environment and in the laboratory environment.
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Conclusion & Impact:Laboratory tests are carried out with a 9kVA 3-phase NPC inverter circuit.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Yapay Sinir Ağları · Kapasitör Gerilim Dengeleyici · Akım Kontrolcü

Abstract

In this study, an Artificial Neural Network-based Current Controller (ANN-CC) and an ANN-based Capacitor Voltage Balancer (ANN-CVB) for a three-phase three-level Neutral Point Clamped (NPC) single-stage and transformerless grid-connected Photovoltaic (PV) inverter system is designed. ANNs are trained using the data obtained from the inverter simulation prepared using Proportional-Resonant (PR) and Proportional-Integral (PI) controllers in MATLAB/Simulink environment. The designed ANN-CVB is a PI-based static network. ANN-CC, on the other hand, is PR based and has a dynamic structure. When the obtained ANN controllers are compared with the other ANN controllers found in the literature on the basis of the size and tasks of the network structures, it is seen that they do not require much computational burden and are easy to implement. The performances of ANN controllers and classical controllers have been comparatively tested both in the simulation environment and in the laboratory environment. Simulation tests are carried out in a cooperation simulation approach. In the cooperation simulation, the entire controller of the grid connected PV inverter is programmed on the prototype inverter control card whereas its power circuits are kept in the Simulink. Using such a cooperation approach in power electronics applications is a generalized method for testing the prepared software safely before the experimental work. In the prototype inverter control card, STM32F407VGT6 DISCOVERY Board is used and the control software is prepared in MikroC language. Laboratory tests are carried out with a 9kVA 3-phase NPC inverter circuit.

Özet

Bu çalışmada, üç fazlı üç seviyeli Nötr Noktası Kenetli (NNK) tek aşamalı ve transformatörsüz şebeke bağlantılı bir Fotovoltaik (FV) evirici sistemi için bir Yapay Sinir Ağı tabanlı Akım Kontrolcüsü (YSA-AK) ve bir YSA tabanlı Kapasitör Gerilim Dengeleyici (YSA-KGD) tasarlanmıştır. MATLAB/Simulink ortamında, Orantısal-Rezonans (PR) ve Orantısal-İntegral (PI) kontrolcüler kullanılarak hazırlanan evirici benzetimden elde edilen veriler kullanılarak YSA’lar eğitilmiştir. Tasarlanan YSA-KGD, PI tabanlı statik yapıda bir ağdır. YSA-AK ise PR tabanlıdır ve dinamik bir yapıya sahiptir. Elde edilen YSA kontrolcüler, literatürde bulanan diğer YSA kontrolcüler ile ağ yapılarının büyüklüğü ve görevleri esas alınarak karşılaştırıldığında, fazla işlem yükü gerektirmeyen, uygulanması kolay yapıda oldukları görülmüştür. YSA ve klasik kontrolcülerin performansları hem benzetim ortamında hem de laboratuvar ortamında karşılaştırmalı olarak test edilmiştir. Benzetim ortamındaki testler, FV evirici sisteminin güç katı MATLAB ortamında, tüm kontrol yazılımları prototip evirici kontrol kartı içerisinde olacak şekilde bir ortak çalışma yaklaşımı ile gerçekleştirilmiştir. Bu yaklaşım güç elektroniği uygulamalarında deneysel çalışmaya geçilmeden önce, hazırlanan yazılımın güvenli şekilde test edilebilmesi için genelleştirilmiş bir yöntemdir. Prototip evirici kontrol kartı tasarımında STM32F407VGT6 DISCOVERY Board kiti kullanılmıştır ve kontrol yazılımları MikroC dilinde hazırlanmıştır. Laboratuvar testleri 9kVA’lik 3 fazlı bir NNK evirici devresi ile gerçekleştirilmiştir.

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Cite This Article

Yağan, Y. E., Vardar, K. (2025). Implementation of an ANN based Controllers for Three Phase NPC Grid Connected PV Inverter. Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, Cilt: 25 Sayı: 3, 544–557. https://doi.org/10.35414/akufemubid.1559119

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