Integrated Use of Time-Frequency Wavelet Decompositions for Fault Location in Distribution Networks: Theory and Experimental Validation

被引:206
作者
Borghetti, A. [1 ]
Bosetti, M.
Nucci, C. A.
Paolone, M. [1 ]
Abur, A. [2 ]
机构
[1] Univ Bologna, Dept Elect Engn, Power Syst Grp, Bologna, Italy
[2] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA
关键词
Continuous wavelet transform; distribution networks; fault location; fault transients; power quality; TRANSMISSION-LINES; TRANSIENTS; TRANSFORM;
D O I
10.1109/TPWRD.2010.2046655
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];
摘要
The paper presents a procedure for fault location in distribution networks, based on the use of the integrated time-frequency wavelet decompositions of the voltage transients associated with the fault-originated travelling waves. The proposed analysis of time-frequency wavelet decompositions has been found to improve the identification accuracy of the frequencies associated to the characteristic patterns of a fault location with respect to a sole frequency-domain wavelet analysis. Several laboratory fault tests, carried out by means of a reduced-scale model of a distribution feeder, are used to illustrate the characteristics and assess the performances of the proposed improved procedure. The paper also illustrates the application of the proposed procedure to a transient, originated by a permanent phase-to-phase fault, measured in a real distribution network in which a post-test analysis has identified the faulted branch.
引用
收藏
页码:3139 / 3146
页数:8
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