Stability Analysis of the Automatic Voltage Regulation System with PI Controller

Year 2017, Volume: 21 Issue: 4, 698 - 705, 01.08.2017

Mahmut Özdemir Vedat Çelik

https://doi.org/10.16984/saufenbilder.270251

Abstract

The system voltage is one of the
most important parameters, which determines the power quality. The stability of
the system voltage is critical for the power system. This paper investigates
the stability analysis of the automatic voltage regulation (AVR) system
controlled by a PI controller related to the controller gains. For this
purpose, a graphical-based technique called as the stability boundary locus
method is proposed in the paper to obtain the stable parameters space of PI
controller gains. Stability of closed region computed on parameters space
determines from roots of characteristic equation of AVR system. The time-domain
simulations are performed in Matlab/Simulink environment to validate the
theoretical results.  

Keywords

Automatic voltage regulation, Stability boundary locus, Stable parameters space, Electric power system

PI Kontrolörlü Otomatik Gerilim Regülasyon Sisteminin Kararlılık Analizi

Abstract

Elektrik güç sistemlerinde güç kalitesine etki eden en önemli parametre sistem gerilimidir. Sistem geriliminin kararlılığı güç sistemi açısından çok kritik öneme sahiptir. Bu çalışma, otomatik gerilim regülasyon (OGR) sisteminde PI kazançlarının değerlerine bağlı olarak sistem kararlılığını analiz etmiştir. Bu amaçla, kararlı PI parametre uzayını elde etmek için grafik tabanlı olan kararlılık sınır eğrisi metodu önerilmiştir. OGR sisteminin karakteristik denkleminin köklerine göre kararlılık kapalı bölgesi hesaplanmıştır. Teorik olarak elde edilen bu bölge, Matlab/Simulink ortamında gerçekleştirilen zaman domain benzetimleri ile doğrulanmıştır. 

Keywords

Otomatik Gerilim Regülasyonu, Kararlı Parametre Uzayı, Elektrik Güç Sistemi, PI kontrolör, kararlılık sınır eğrisi

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