Research on the Arithmetic of Non-unit Voltage Protection for EHV Transmission Line Based on Wavelet Analysis

Author

Yang, Ming-Yu ; Wang, Shi-Xu ; Mao-Ying, Chen

Author_Institution

Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control., North China Electr. Power Univ., Baoding

fYear

2005

fDate

2005

Firstpage

1

Lastpage

4

Abstract

This paper presents a new non-unit voltage protection algorithm for extra high voltage (EHV) transmission lines. This scheme is developed using wavelet analysis, in which the singularity of fault transient voltage signals in one terminal is utilized to discriminate clearly between internal and external faults. Lipschitz exponent (LE) is obtained from wavelet modulus maximum to detect singularity of signals. A typical 500-kV EHV transmission system has been simulated by ATP to evaluate the scheme. The simulation results show that this scheme is capable of providing correct responses under various system configurations and fault conditions

Keywords

power system simulation; power transmission faults; power transmission lines; power transmission protection; wavelet transforms; 500 kV; ATP simulation; EHV transmission line; Lipschitz exponent; extra high voltage transmission lines; fault transient voltage signals; nonunit voltage protection algorithm; signal singularity; wavelet analysis; wavelet modulus; wavelet transform; Arithmetic; Circuit faults; Power system protection; Power system transients; Power transmission lines; Signal detection; Transmission lines; Voltage; Wavelet analysis; Wavelet transforms; Lipschitz exponent; non-unit voltage protection; wavelet modulus maxima; wavelets transform;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES

Conference_Location

Dalian

Print_ISBN

0-7803-9114-4

Type

conf

DOI

10.1109/TDC.2005.1546911

Filename

1546911