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

Year 2018, , 349 - 360, 28.12.2018

Yasemin Önal

https://doi.org/10.17798/bitlisfen.428480

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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