Hasan ÜZMUŞ, Naci GENÇ, Mehmet Ali ÇELİK

FV sistemler için DSP tabanlı hibrit kontrol yöntemi

Güneşten gelen ışınları elektrik enerjisine dönüştüren fotovoltaik (FV) paneller çıkışlarında doğrusal olmayan düşük seviyeli doğru akım (DA) formunda gerilim üretirler. Bu çalışmada, yüksek güçlü uygulamalar için FV panellerin gerilimini regüle etmek amacıyla yükselten tip DA/DA dönüştürücü devresine DSP tabanlı hibrit kontrol yöntemi önerilmiştir. Önerilen bu kontrol yöntemi aynı zamanda değiştir ve gözle maksimum güç noktası izleme (D&G MGNİ) işlevini de içermektedir. Gerilim kontrolü için PI ve akım kontrolü için ortalama kayan kipli (OKK) kontrolcü kullanılmıştır. Önerilen hibrit kontrol yöntemi, D&G MGNİ, PI, OKK kontrolcülerinin arka arkaya seri bağlanmasıyla elde edilmiştir. Önerilen kontrol yöntemi ile FV panel maksimum güç noktasında çalıştırılırken, çıkış gerilimi ve akımı sırasıyla PI ve OKK kontrolcüleri ile kontrol edilmiştir. DA/DA yükselten tip dönüştürücünün giriş kaynağı FV panel olarak modellenmiş ve MATLAB/Simulink benzetim ortamında önerilen hibrit kontrol yöntemi ile kontrol edilmiştir. Önerilen sistem ve kontrolcü için deney düzeneği kurulmuş ve DSP TMS320F28379D kartı vasıtasıyla çıkış gerilimi 200V ve çıkış gücü 400W olan sistemin deneysel sonuçları aktarılmıştır.

Anahtar Kelimeler:

FV panel, DA/DA dönüştürücü, MGNİ, hibrit kontrol, DSP

DSP based hybrid control method for PV systems

Photovoltaic (PV) panels, which convert solar energy into electrical energy, generate non-linear, low-level direct current (DC) voltage. In this study, a DSP-based hybrid control method was proposed for the DC/DC boost converter to regulate the voltage of PV panels for high power applications. This proposed control method also includes perturb and observation maximum power point tracking (P&O MPPT) method. The output voltage was controlled with PI controller, and the current with average sliding mode (ASM) controller. The proposed hybrid control method was obtained by cascading P&O MPPT, PI, ASM controllers. With the proposed hybrid control method, while the PV panel was operated at the maximum power point, the output voltage and current were controlled by PI and ASM controllers, respectively. The input source of the DC/DC boost converter was modeled as FV panel and controlled with the proposed hybrid control method in the MATLAB/Simulink environment. The experimental setup was established for the proposed system and controller, and the experimental results of the system with 200V output voltage and 400W output power by DSP TMS320F28379D card were presented.

Keywords:

PV panel, DC/DC converter, MPPT, Hybrid control, DSP,

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