A new protection algorithm for EHV transmission line based on singularity detection of fault transient voltage

Author

Yang, Ming-Yu ; Yao, Wan-ye ; Wang, Zeng-ping ; Jiao, Yan-Jun ; Zhang, Ju

Author_Institution

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

fYear

2005

fDate

Nov. 29 2005-Dec. 2 2005

Firstpage

1

Lastpage

608

Abstract

A new non-unit voltage protection algorithm for extra high voltage (EHV) transmission lines is presented in this paper. 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 transmission faults; power transmission protection; wavelet transforms; EHV transmission line; Lipschitz exponent; external faults; extra high voltage transmission lines; fault transient voltage; internal faults; nonunit voltage protection algorithm; singularity detection; Circuit faults; Fault detection; Frequency; Power system protection; Power system transients; Power transmission lines; Signal detection; Transmission lines; Voltage; Wavelet transforms; Lipschitz exponent; non-unit voltage protection; wavelet modulus maxima; wavelets transform;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference, 2005. IPEC 2005. The 7th International

Conference_Location

Singapore

Print_ISBN

981-05-5702-7

Type

conf

DOI

10.1109/IPEC.2005.206979

Filename

1627268