Stability analysis of the automatic voltage regulation system with PI controller

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 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 automatic voltage regulation system. The time-domain simulations are performed in Matlab/Simulink environment to validate the theoretical results.

PI Kontrolörlü otomatik gerilim regülasyon sisteminin kararlılık analizi

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.

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