Title :
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
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;
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1546911
