A transient current based double line transmission system protection using fuzzy-wavelet approach in the presence of UPFC

作者：Goli Ravi Kumar^*; Shaik Abdul Gafoor; Ram S S Tulasi

来源：International Journal of Electrical Power & Energy Systems, 2015, 70: 91-98.

DOI：10.1016/j.ijepes.2015.01.024

• Fault index
• Multi Resolution Analysis
• Transmission line protection
• UPFC
• Fuzzy logic

This paper presents a wavelet fuzzy based protection scheme for a double line transmission system with unified power flow controller. The protection scheme makes use of current signals at both the ends of transmission line which are synchronized with the help of global position system clock. A wavelet based multiresolution analysis is used to find the detailed coefficients of these signals which are utilized to calculate fault index. These fault indexes are compared with a threshold value to detect and classify faults on transmission system. The approximate decomposition of the current signals is utilized to locate the fault using Fuzzy logic from their respective terminals. The proposed algorithm has been tested successfully for various faults at different locations.

• 出版日期2015-9