A method of line fault location based on traveling wave theory

This paper combines traveling wave distance measuring principle with the wavelet transform and applies it to the detection and localization of power system short-circuit fault to avoid the severity and multiple of line short-circuit fault. Firstly, according to the current or voltage traveling wave signals detected by traveling wave detection devices put on the bus bar ends, we take traveling wave distance measuring principle as the theoretical basis to extract signals. Then, using wavelet transform to process the signal in order to extract the singular points. Also, traveling wave fault location is established by using B-type double-terminal traveling wave fault location algorithm. Finally, in order to locate the fault precisely and make simulation on different fault types and different sampling frequencies to come to a conclusion, we make wavelet transform of the transient fault signals and make further simulation about the location of single-phase grounding fault. © 2016 SERSC.