Tek fazlı köprüsüz düşürücü GFD konvertörleri için PQ tabanlı yeni bir denetleyici

Abstract

Doğrusal olmayan yükler enerji sistemlerine bağlandıklarında şebekenin güç kalitesini bozmaktadırlar. Bu yüzden enerji sistemlerinde güç faktörünün (GF) yanı sıra toplam harmonik bozulmasınında (THB) iyileştirilmesi gerekmektedir. Bu çalışmada enerji sistemlerinde THB'nin yanı sıra GF'yi geliştirmede kullanılan tek faz köprüsüz düşürücü güç faktörü düzeltme (DGFD) konvertörleri için PQ güç teorisine dayalı yeni bir denetleyici önerilmektedir. Köprüsüz DGFD konvertörlerde, girişte bulunan köprü doğrultucu karmaşıklığı azaltmak ve genel verimliliği artırmak için ortadan kaldırılmaktadır. Önerilen PQ tabanlı denetleyicide referans akım sinyali anlık aktif ve reaktif güçler kullanılarak elde edilmektedir. Elde edilen referans akım sinyali PWM anahtarlama sinyallerini üretmek için akım kontrol döngüsünde kullanılmaktadır. Önerilen denetleyicinin performansı 100W’lık DGFD konvertör için PSIM programı kullanılarak doğrulanmıştır. Önerilen denetleyici geçici ve kararlı durum performansına göre, tek fazlı sistemlerde THB ve GF'nin geliştirilmesi açısından oldukça başarılı bulunmuştur.

Keywords

• Köprüsüz düşürücü GFD konvertörleri,toplam harmonik bozulma THB,güç faktörü GF,PQ güç teorisi,Güç kalitesi

A new controller based on PQ for single phase bridgeless buck PFC converters

Abstract

The abstract of the manuscript will write this section as English. When nonlinear loads are connected to energy systems, they decrease the power quality of the grid. Therefore, There is a need to improve the total harmonic distortion (THD) as well as the power factor (PF). In this study, a new controller based on PQ power theory is presented for single-phase bridgeless buck power factor correction (DPFC) converters to improve the THD as well as the PF of the energy systems. In bridgeless BPFC converters, the input bridge rectifier is removed to reduce complexity and increase overall efficiency. In the proposed PQ based controller, the reference current signal is obtained by using the active and reactive powers. The reference current signal is used in the current control loop to generate PWM switching signals. The performance of the proposed controller is verified using the PSIM circuit simulation for a 100W BPFC converter. The proposed controller is found to be quite successful in terms of the improvement of THD and PF in single phase systems according to the transient and steady state performance.

Keywords

• Bridgeless buck PFC converters,total harmonics distortion (THD),power factor PF,PQ theory,power quality

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