Güç sistemlerinde farklı PSS modelleri ve UPFC-POD ile küçük sinyal kararlılığının incelenmesi

Abstract

Düşük frekanslı salınımların sönümlenmesi güç sistemleri kararlılığı açısından önemli bir konudur. Bu salınımlar güç sistemi kararlı kılıcısı (PSS) tarafından sönümlenmektedir. Son yıllarda güç elektroniği tabanlı Esnek AC İletim Sistemi (FACTS) cihazları güç sistemlerinde kararlılığı çalışmalarında verimli bir şekilde kullanılmaktadır. Bu çalışmada farklı PSS modelleri, FACTS cihazlarının en gelişmiş olan Birleştirilmiş Güç Akışı Kontrolü (UPFC) ve Güç Salınım Sönümlemesi (POD) modeli birlikte koordinasyon kontrolünün sağlanması amacıyla kullanılmıştır. Senkron generatörlerde kullanılan PSS modellerinin yanı sıra Otomatik Gerilim Regülatörü (AVR) ve Türbin Yöneticisi (TG) modelleri de kullanılmıştır. 2 alanlı, 4 makinalı güç sisteminde küçük sinyal kararlılığı analizi gerçekleştirilmiştir. Benzetim çalışması için Güç Sistemleri Analizi Programı (PSAT) kullanılmıştır. Yapılan çalışma neticesinde farklı PSS modellerin UPFC-POD ile birlikte kullanılmasında açısal hız, gerilim, aktif ve reaktif güç karşılaştırmaları yapılmış olup, küçük sinyal kararlılığı analizleri yorumlanmıştır.

Keywords

• Güç sistemleri
• Küçük sinyal kararlılığı
• Farklı PSS modelleri
• UPFC-POD

Investigation of small signal stability with different PSS models and UPFC-POD in power systems

Abstract

The damping of small frequency oscillations is an important issue in terms of power system stability. These oscillations are damped by the power system stabilizer (PSS). In recent years, power electronics based Flexible AC Transmission System (FACTS) devices have been used efficiently in power system stability studies. In this study, different PSS models, the most advanced model of FACTS devices Unified Power Flow Control (UPFC) and Power Oscillation Damping (POD) were used to provide coordination controller. In addition to PSS models used in synchronous generators, Automatic Voltage Regulator (AVR) and Turbine Governor (TG) models were also used. Small signal stability analysis was carried out in a 2-field, 4-machine system. Power Systems Analysis Program (PSAT) was used for the simulation study. As a result of the study, angular velocity, voltage, active and reactive power comparisons were made in the use of different PSS models with UPFC-POD, and small signal stability analyzes were interpreted.

Keywords

• Power systems
• Small signal stability
• Different PSS models
• UPFC-POD

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