ÜÇ-FAZLI DÖRT-TELLİ ŞEBEKE BAĞLANTILI NÖTR NOKTASI KENETLİ BİR EVİRİCİ’NİN YSA İLE KONTROLÜ

Abstract

Bu çalışmada üç fazlı dört telli şebeke bağlantılı nötr noktası kenetli (NNK) bir eviricinin kontrolü için çok katmanlı algılayıcı yapısında olan bir yapay sinir ağı (YSA) kontrolcüsü tasarlanmış ve test edilmiştir. Tasarlanan YSA kontrolcü, MATLAB/Simulink ortamında oransal-integral (PI) kontrolcüler kullanılarak oluşturulan bir kontrol döngüsünden elde edilen veriler ile, Levenberg Marquardt geri yayılım eğitim algoritmasıyla eğitilmiştir. YSA kontrolcünün görevleri, NNK eviricide akım kontrolünü ve kapasitör gerilimlerinin dengelenmesini sağlamaktır. Önerilen YSA kontrolcünün performansı MATLAB/Simulink ortamında modellenen şebeke bağlantılı NNK evirici sistemi kullanılarak test edilmiştir. Test sonuçları, aynı evirici sisteminde PI kontrolcüler kullanılarak elde edilen sonuçlar ile karşılaştırmalı olarak sunulmuştur.

Keywords

• Nötr noktası kenetli evirici
• Oransal-integral kontrolcü
• Şebeke bağlantılı evirici
• Yapay sinir ağları.

Three-Phase Four-Wire Grid-Connected Neutral Point Clamped Inverter with ANN Controllers

Abstract

In this study, an artificial neural network (ANN) controller with a multilayer perceptron structure is designed and tested for the control of a three-phase, four-wire grid-connected neutral point clamped (NPC) inverter. The designed ANN controller is trained using the Levenberg Marquardt backpropagation training algorithm, with data obtained from a control loop created using proportional-integral (PI) controllers in the MATLAB/Simulink environment. The tasks of the ANN controller are to provide current control and capacitor voltage balancing control in the NPC inverter. The performance of the proposed ANN controller is tested using the grid-connected NPC inverter system modeled in the MATLAB/Simulink environment. The test results are presented in comparison with the results obtained using PI controllers in the same inverter system.

Keywords

• Artificial neural networks
• Grid-connected inverter
• Neutral point clamped inverter
• Proportional-integral controller.

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