Title :
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
fDate :
Nov. 29 2005-Dec. 2 2005
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;
Conference_Titel :
Power Engineering Conference, 2005. IPEC 2005. The 7th International
Conference_Location :
Singapore
Print_ISBN :
981-05-5702-7
DOI :
10.1109/IPEC.2005.206979
