Investigation of small signal stability with different generator controller models in power systems

Abstract

Stability analyzes are examined with the help of simulation programs in the continuous, economical and reliable operation of multi-machine power systems. The most common stability analysis in power systems is small signal stability. In this study, small signal stability analysis was investigated with different generator controller models in a 4-machine 2-field test system. Power System Stabilizer (PSS), Automatic Voltage Regulator (AVR) and Turbine Governor (TG) are used as different generator controller models. The simulation study was carried out in the Power Systems Analysis Program (PSAT). Comparisons were made between the situation where there are no controllers in the synchronous generator and the situations with PSS, AVR and TG models. Comparisons are given in figures and tables. In this study, it was observed that the use of PSS, AVR and TG models in a synchronous generator stabilized the system in a short time, the oscillations in the parameters were reduced and the system gave more effective results in terms of small signal stability.

Keywords

• PSS
• AVR
• TG
• Synchronous generator
• Small signal stability

Güç sistemlerinde farklı generatör denetleyici modelleri ile küçük sinyal kararlılığının incelenmesi

Abstract

Çok makinalı güç sistemlerinin sürekli, ekonomik ve güvenilir olarak çalışmasında benzetim programları yardımı ile kararlılık analizleri incelenmektedir. Güç sistemlerinde en yaygın olarak yapılan kararlılık analizi küçük sinyal kararlılığıdır. Bu çalışmada çalışmasında 4 makinalı 2 alanlı test sisteminde farklı generatör denetleyici modelleri ile küçük sinyal kararlılığı analizi incelenmiştir. Farklı generatör denetleyici modelleri olarak Güç Sistem Kararlı Kılıcısı Denetleyicisi (GSKK), Otomatik Gerilim Regülatörü (OGR) ve Türbin Yöneticisi (TY) kullanılmıştır. Benzetim çalışması Güç Sistemleri Analiz Programı (PSAT)’da gerçekleştirilmiştir. Senkron generatörde denetleyicilerin olmadığı durum ile GSKK, OGR ve TY modellerinin olduğu durumların karşılaştırmaları yapılmıştır. Karşılaştırmalar şekiller ve tablolar halinde verilmiştir. Bu çalışmada GSKK, OGR ve TY modellerinin senkron generatörde kullanılması sistemin kısa süre içerisinde kararlı hale geldiği, parametrelerdeki salınımların azaldığı ve sistemin küçük sinyal kararlılığı açısından daha etkili sonuçlar verdiği görülmüştür.

Keywords

• GSKK
• OGR
• TY
• senkron generatör
• Küçük sinyal kararlığı

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