A CT saturation detection algorithm based on wavelet transformation

Author

Sang-Hee Kang ; Min-Soo Kim ; Soon-Ryul Nam ; Shin, J.H. ; Jong-Jin Jung

Author_Institution

Myongji Univ., Yongin, South Korea

fYear

2014

fDate

March 31 2014-April 3 2014

Firstpage

1

Lastpage

4

Abstract

Current Transformer (CT) saturation may cause the maloperation or operating time delay of protective relays. In this paper, a CT saturation detection algorithm based on wavelet transformation is suggested. The WT (Wavelet Transformation) can be easily implemented with the multilevel filter banks. Daubechies 2 is used as the mother wavelet in the proposed algorithm. A second order Butterworth high-pass filter is used to extract the fine peak feature from the output signal of the filter banks. A series of test results show that the proposed algorithm detects the saturated region accurately under various faults and CT conditions of a C800 CT model.

Keywords

Butterworth filters; channel bank filters; delays; relay protection; wavelet transforms; C800 CT model; CT saturation detection algorithm; Daubechies 2; current transformer saturation; maloperation; multilevel filter banks; peak feature; protective relays; second order Butterworth highpass filter; time delay; wavelet transformation; CT Saturation; Filter Bank; Power System Protection; Saturation Detection; Wavelet Transformation;

fLanguage

English

Publisher

iet

Conference_Titel

Developments in Power System Protection (DPSP 2014), 12th IET International Conference on

Conference_Location

Copenhagen

Print_ISBN

978-1-84919-834-9

Type

conf

DOI

10.1049/cp.2014.0116

Filename

6822924