THE VOLTAGE CONTROL IN AN ENERGY TRANSMISSION SYSTEM BY STATCOM

Öz

Voltage stability is very important in power systems. It is known that reactive power flows are very efficient  on the system voltage and stability. STATCOM is one of the converter based FACTS devices used for reactive power compensation. In this study, at the distribution bus of an energy transmission system, in spite of load variations, control of the bus voltage have been done with STATCOM. Firstly STATCOM operation is investigated and then the equations related with STATCOM and energy transmission system is given.  The simulation of this energy transmission system which the STATCOM installed at distribution bus is realized in the MATLAB/Simulink environment. In the simulation results; It has been seen that STATCOM  hold the bus voltage at desired values,  inspite of load variations reactive power compensation is provided very fast and voltage stability of the system is improved.

Anahtar Kelimeler

• Voltage stability,FACTS,STATCOM,Reactive Power Compensation

STATCOM İLE BİR ENERJİ İLETİM SİSTEMİNDE GERİLİM KONTROLÜ

Öz

Güç sistemlerinde gerilim kararlılığı çok önemlidir. Reaktif güç akışlarının sistem gerilimi ve kararlılığı üzerinde çok etkili olduğu bilinmektedir. STATCOM reaktif güç kompanzasyonu için kullanılan konverter tabanlı FACTS (Esnek Alternatif Akım İletim Sistemleri) cihazlarından biridir. Bu çalışmada bir enerji iletim sistemindeki dağıtım barasında, yük değişimlerine karşın STATCOM ile bara geriliminin kontrolü yapılmıştır. Öncelikle STATCOM çalışma prensibi incelenmiş, daha sonra STATCOM ve enerji iletim sistemi ile ilgili denklemler verilmiştir. Dağıtım barasında STATCOM kurulu olan bu enerji iletim sisteminin benzetimi MATLAB/Simulink ortamında gerçekleştirilmiştir. Benzetim sonuçlarında; STATCOM’un bara gerilimini istenen değerlerde tuttuğu, yük değişimlerine karşın hızlı bir şekilde reaktif güç kompanzasyonu sağladığı ve sistemin gerilim kararlılığını iyileştirdiği gözlenmiştir.

Anahtar Kelimeler

• Gerilim Kararlılığı,FACTS,STATCOM,Reaktif Güç Kompanzasyonu

Kaynakça

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