A New Approach to Current Transformer Saturation Compensation for Transmission Line Differential Protection

被引:0
|
作者
Ebrahimian, Valiolah [1 ]
Namdari, Farhad [1 ]
Shakarami, Mahmoud-Reza [1 ]
机构
[1] Lorestan Univ, Dept Elect Engn, Khorramabad, Iran
关键词
current differential relaying; transmission networks; wide area protection; signal reconstruction; current transformer saturation; NARX; ALGORITHM;
D O I
10.1080/15325008.2024.2305858
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A non-linear autoregressive network with external inputs (NARX) model to reconstruct the current transformer (CT) secondary waveform distortion in the presence of protected transmission lines is presented. The qualitative analysis carried out on the autonomous model reveals the accurate performance of the current differential relay, because of the ability of the NARX to make accurate predictions and signal reconstruction even when faced with noisy or incomplete datasets. The suggested method uses samples of the line-protected remote current signal to produce a desired waveform. The unsaturated section is artificially expanded because it can estimate up to one sample after saturation with a respectable level of accuracy. The proposed method is evaluated by MATLAB and PSCAD software. The effectiveness of the suggested method for different fault types under varied situations has been proved. The simulation outcome confirms the method's high accuracy concerning the unusual system conditions in the presence of CT saturation.
引用
收藏
页数:15
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