Fault location determination for transmission lines with different series-compensation levels using transient frequencies

Authors : Düzgün AKMAZ, Mehmet Salih MAMİŞ, Müslüm ARKAN, Mehmet Emin TAĞLUK

Pages : 3764-3775

View : 35 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this paper, based on the theory of traveling waves, the fault distances on long transmission lines with various series-compensation levels are determined using transient current and voltage frequencies. Transmission lines with series compensation are modeled using Alternative Transients Program software with frequency-dependent effects on the line included in the simulation. The transient current and voltage signals are obtained from the model. A fast Fourier transform is used for frequency-domain conversion and fault location is estimated from the frequencies of fault-generated harmonics in the transient spectrum. The algorithm is implemented in MATLAB. To investigate the effect of compensation on accuracy, the results are obtained for different series-compensation levels. The undesirable source-inductance effect is removed and estimation accuracy is further improved using a waveform-relaxation method. The method is found to be successful in determining fault location on series-compensated transmission lines. The effects of the compensation level, fault resistance, and phase angle are investigated.
Keywords : Fault location estimation, traveling waves, series compensation, transmission lines, transients