Investigation of small signal stability with automatic voltage regulation-secondary voltage control in power systems

Abstract

It is an important issue to correct the disturbances that occur in the system during transient stability in power systems in a short time. For this, both the generator and the buses must be controlled in a coordinated manner. In this study, small signal stability analysis in a multi-machine power system was examined using automatic voltage regulator and secondary voltage control. While automatic voltage regulator is used to control the generator, secondary voltage control is used to control the pilot bus determined depending on the fault. Various results have been examined for the small signal stability as well as the angular speed change of the system. Comparisons are made according to the situations in which automatic voltage regulator-secondary voltage control is used and not used. According to the results obtained, it has been determined that the system gives better results by using the automatic voltage regulator-secondary voltage control in a coordinated manner.

Keywords

• Power systems
• Secondary voltage control
• Automatic voltage regulator
• PSAT

Güç sistemlerinde otomatik gerilim regülatörü-sekonder gerilim kontrolü ile küçük sinyal kararlılığının incelenmesi

Abstract

Güç sistemlerinde geçici kararlılık esnasında sistemde oluşan bozunumların kısa sürede düzeltilmesi önemli bir konudur. Bunun için hem generatör hem de baraların koordineli bir şekilde kontrol edilmesi gerekmektedir. Bu çalışmada, otomatik gerilim regülatörü ve sekonder gerilim kontrolü kullanılarak çok makineli bir güç sisteminde küçük sinyal kararlılığı analizi incelenmiştir. Generatörün denetlenmesinde otomatik gerilim regülatörü kullanılırken, arızaya bağlı olarak belirlenen pilot baranın denetiminde sekonder gerilim kontrolü kullanılmaktadır. Sistemin açısal hız değişiminin yanı sıra küçük sinyal kararlılığı için de çeşitli sonuçlar irdelenmiştir. Karşılaştırmalar, otomatik gerilim regülatörü-sekonder gerilim kontrolünün kullanıldığı ve kullanılmadığı durumlara göre yapılmıştır. Elde edilen sonuçlara göre otomatik gerilim regülatörü-sekonder gerilim kontrolünün koordineli bir şekilde kullanılması ile sistemin daha iyi sonuçlar verdiği tespit edilmiştir.

Keywords

• Güç sistemleri
• Otomatik gerilim regülatörü
• Sekonder gerilim kontrolü
• PSAT

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