GÜÇ KALİTESİ SORUNLARINI ÇÖZMEK İÇİN FOTOVOLTAIK (PV) PANEL DESTEKLİ BİRLEŞİK GÜÇ KALİTESİ DÜZENLEYİCİSİ İÇİN YENİ BİR DENETLEYİCİ

Öz

Bu çalışmada, enerji sistemlerindeki güç kalitesi sorunlarını çözmek için fotovoltaik (PV) panel destekli üç fazlı birleşik güç kalitesi düzenleyicisinde (PV-UPQC) senkron referans çerçevesine (SRF) dayanan yeni bir denetleyici önerilmiştir. PV panel sistemi tarafından üretilen enerji ile beslenen seri ve paralel aktif güç filtreleri, PV-UPQC sisteminde birlikte kullanılmaktadır. Önerilen denetleyicide, güç sisteminin dört farklı noktasından ölçüm değerleri alınır. Elde edilen değerler ve PV paneller tarafından üretilen DC gerilim, referans akım ve gerilim değerlerinin hesaplanmasında kullanılmaktadır. Aktif filtrelerde kullanılan anahtarların PWM sinyalleri hareketli ortalama filtre ve uzay vektör-PWM yöntemleri kullanılarak üretilmektedir. Her iki filtrede de kullanılan algoritma iki bölümden oluşmaktadır. Birincisi, maksimum gerilimin PV panellerinden elde edildiği mppt algoritması ve ikincisi, referans akımın veya gerilimin elde edildiği SRF tabanlı önerilen denetleyici algoritmasıdır. Önerilen denetleyicinin simülasyon ve deneysel çalışmaları yapılmıştır. Elde edilen sonuçlar incelendiğinde, üç fazlı PV-UPQC için önerilen denetleyici, akım ve gerilimdeki harmoniklerin azaltılmasında geleneksel SRF tabanlı denetleyiciden daha iyi sonuçlar vermektedir.

Anahtar Kelimeler

• Toplam harmonik bozulma
• Aktif güç filtresi
• Fotovoltaik sistem
• Hareketli ortalama filtre HOF
• Güç kalitesi

A NEW CONTROLLER FOR PHOTOVOLTAIC PANEL FED UNIFIED POWER QUALITY CONDITIONER TO POWER QUALITY IMPROVEMENT

Öz

In this study, a new controller based on the synchronous reference frame (SRF) in a photovoltraic (PV) panel supported three-phase unified power quality conditioner (PV-UPQC ) is proposed to solve power quality problems in power systems. The serial and parallel active power filters fed with energy by PV panels are used together in the PV-UPQC system. In the proposed controller, measurement values are taken from four different points of the power system. The obtained values and DC voltage generated by PV panels are used to calculate the reference current and voltage values. PWM signals of switches used in active filters are produced using moving average filter and space vector-PWM. The algorithm used in both filters consists of two parts. The first is the mppt algorithm, in which the maximum voltage is obtained from the PV panels, and the second is the SRF-based proposed algorithm, where the reference current or voltage is obtained. Simulation and experimental studies of the proposed controller are applied. When the results obtained are examined, the proposed controller for three-phase PV-UPQC gives better results than the traditional SRF based controller in attenuation of harmonics in current and voltage.

Anahtar Kelimeler

• Total harmonic distortion
• Active power filter
• Photovoltaic system
• Moving average filter MAF
• Power quality improvement

Kaynakça

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