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

Yıl 2018, Sayı: 14, 353 - 363, 31.12.2018

Ozan Akdağ Celaleddin Yeroğlu

https://doi.org/10.31590/ejosat.473773

Cited By: 1

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

Öz

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.

Anahtar Kelimeler

Current Transformers, Saturation, Harmonic analysis, FFT

Kaynakça

• Yildirim A., Analysis of nearby phase current effects on current transformer errors in three phase systems, Master's Thesis. Istanbul Teknik University, İstanbul, Turkey, 2011.
• Cinar H., Operating zone and stability analysis in current transformers based on measurement, Master's Thesis. Bilecik Şeyh Edebali Üniversitesi, Karabük, Turkey, 2016.
• Guzman, A., Zocholl, Z., Benmouyal, G., Altuve, H. J. A., current-based solution for transformer differential protection. I. Problem statement. IEEE Transactions on power delivery, 16(4), 485-491, 2001.
• Ajaei, F. B., Sanaye-Pasand, M., Davarpanah, M., Rezaei-Zare, A., Iravani, R., Compensation of the current-transformer saturation effects for digital relays. IEEE Transactions on Power Delivery, 26(4), 2531-2540, 2011.
• Pan, J., Vu, K., & Hu, Y., An efficient compensation algorithm for current transformer saturation effects. IEEE Transactions on Power delivery, 19(4), 1623-1628, 2004
• Rebizant, W., & Bejmert, D., Current transformer saturation detection with genetically optimized neural networks. In Power Tech, 2005 IEEE Russia (pp. 1-6). IEEE, 2005.
• Dommel, H. W., Yan, A., Wei, S., Harmonics from transformer saturation. IEEE transactions on power delivery, 1(2), 209-215, 1986.
• Pandey, R. P., Patel, R. N., An efficient Detection Algorithm for CT Saturation using linear predictive coding. International Journal of Engineering Development and Research, 2(2), 1648-1652, 2014.
• Hajipour, E., Vakilian, M., & Sanaye-Pasand, M. Current-Transformer Saturation Prevention Using a Controlled Voltage-Source Compensator. IEEE Transactions on Power Delivery, 32(2), 1039-1048, 2017.
• Macieira, G. L., Coelho, A. L. M. Evaluation of numerical time overcurrent relay performance for current transformer saturation compensation methods. Electric Power Systems Research, 149, 55-64, 2017.
• Liu, P., Huang, C., Jiang, Y., & Yang, Y. A digital scheme to minimize the influence of transformer magnetizing inrush or CT saturation on line protection. International Journal of Electrical Power & Energy Systems, 101, 394-402, 2018.
• G. Sybille, Current Transformer Saturation. Mathworks. Hydro-Quebec. Web. 22
• Li, X., Mathematical Model for Current TransformerBased On Jiles-Atherton Theory and Saturation Detection Method, Master's Thesis. University of Kentucky, Lexington, Kentucky, 2016.
• Yang, L., Dolloff, P. A., Phadke, A. G., A microprocessor based bus relay using a current transformer saturation detector. In Power Symposium, Proceedings of the Twenty-Second Annual North American 193-202, IEEE, 1990
• Zheng, E., Liu, Z., & Ma, L., Study on harmonic detection method based on FFT and wavelet transform. In Signal Processing Systems (ICSPS), 2010 2nd International Conference on (Vol. 3, pp. V3-413). IEEE, 2010.
• Yu, D. C., Cummins, J. C., Wang, Z., Yoon, H. J., Kojovic, L. A., Stone, D., Neural network for current transformer saturation correction. In Transmission and Distribution Conference, 1999 IEEE (Vol. 1, pp. 441-446). IEEE, 1999.
• Senyurt Ö., Harmonic Analysis Determined With Fast Fourier Transform On Electric Networks, Analysis of nearby phase current effects on current transformer errors in three phase systems, Master's Thesis. Gazi University, Ankara, Turkey, 2006.