POWER FACTOR CORRECTION OF A SWITCHING MODE POWER SUPPLY BY USING NEURO-FUZZY CONTROLLER

Abstract

ABSTRACT

The operation of front-end power converters can cause many undesirable effects in the Alternative Current (AC) power system. To prevent these undesirable effects, high-quality rectifiers, also called Power Factor Correctors (PFC) should be used. In this paper, power factor correction of switching mode power supply (SMPS) by using Neuro-Fuzzy (NF) controller is proposed. Average current control technique is used in PFC unit of the SMPS and current mode control technique is used in buck converter unit of the SMPS. To make comparison, the proposed SMPS is also controlled using traditional Proportional and Integral (PI) controller. Performances of these two controllers are compared through the computer simulation. Simulations show that NF controlled SMPS offers faster dynamic response and achieves good power factor correction than PI controlled SMPS.

Keywords

• Key Words: Power factor correction, Switching mode power supply, Neuro-fuzzy controller

SİNİRSEL BULANIK DENETLEYİCİ KULLANARAK BİR ANAHTARLAMALI GÜÇ KAYNAĞINDA GÜÇ FAKTÖRÜ DÜZELTİMİ

Abstract

Çeşitli cihazlarda kullanılan güç dönüştürücüleri, alternatif akım (AA) güç sistemlerinde bir çok istenmeyen etkilere sebep olabilmektedir. Bu istenmeyen etkileri önlemek için, Güç Faktörü Düzelticiler(GFD) olarak adlandırılan yüksek kaliteli doğrultucular kullanılmalıdır. Bu makalede, Sinirsel Bulanık Mantık (SBM) denetleyicisi kullanılarak anahtarlamalı güç kaynağının (AGK) güç faktörü düzeltmesi sunulmaktadır. AGK’ nın GFD biriminde ortalama akım denetim tekniği, gerilim düşüren dönüştürücü biriminde akım mod denetim tekniği kullanılmaktadır. Kıyaslama yapmak için, önerilen AGK aynı zamanda geleneksel oransal integral (PI) denetleyici kullanılarak da denetlenmektedir. Bu iki denetleyicinin başarımı bilgisayar benzetimleri ile karşılaştırılmaktadır. Benzetim çalışmaları, SBM denetleyicili AGK’ nın PI denetleyicili AGK’ ya göre daha hızlı dinamik cevaba sahip olduğu ve daha iyi bir güç faktörü düzeltmesi yaptığını göstermektedir

Keywords

• Güç faktörü düzeltimi, Anahtarlamalı güç kaynağı, Sinirsel bulanık denetleyici

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