154 kV İletim Hatlarındaki Akım Transformatörlerinde Simülasyon Modeli ile Harmonik Bozulmaya Dayalı Doygunluk Algılama Yöntemi

Öz

Akım transformatorlerinin doyması ile sekonder akımlarında bozulmalar başlar. Doyma anına kadar, akım transformatörünün primer ve sekonder akımları doğru orantılı olarak değişir. Doyma anından sonra ise bu orantı bozulur. Bu durum koruma rölelerinin doğru çalışmamasına ve diğer arıza durumlarına neden olur. Bu çalışmada Hızlı Fourier Dönüşümü (Fast Fourier Transform- FFT) ile harmonik tabanlı doyum belirleme, yöntemi örnek bir güç sistemi modeli ile birlikte kullanılarak 154 kV Doğu Anadolu güç sisteminin bir kesitinde oluşturulan çeşitli durum senaryoları analiz edilerek yorumlanmıştır. 

Anahtar Kelimeler

• Akım transformatörü,Doyum,Harmonik analiz

Harmonic Distortion Based Saturation Detection Method via Simulation Model in Current Transformers of 154 kV Transmission Lines

Abstract

Distortions start in the secondary currents when the saturation occurs at the current transformers. The primary and secondary currents of the current transformer change proportionally, until the saturation. After saturation, this proportion is degraded. This causes the protection relays to malfunction and other fault conditions. In this study, the harmonic based saturation detection method with Fast Fourier Transform (FFT) was used in conjunction with an example power system model to analyze various scenarios generated in a section of the 154 kV Eastern Anatolian power system.

Keywords

• Current Transformers,Saturation,Harmonic analysis,FFT

References

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