Method of DC Transmission Line Fault Location Based on Double Data Source
This paper introduces the principle,characteristics and application status of various fault location methods for DC transmission lines,including double ended traveling wave method,single ended traveling wave method and time-domain fault analysis method.A comprehensive method for fault location of DC transmission line is proposed in this paper,which combines time domain fault analysis method with traveling wave method,aiming to solve the issues of relatively low reliability of data sources of the traveling wave method and low accuracy of fault location for the time domain method in the practical engineering application.Using dual data sources including high-speed and low-speed data,possible fault points are calculated using single ended traveling wave method/time-domain method,and fault points are determined by filtering the amplitude and polarity characteristics of wavelet transform modulus maximum.The accuracy advantage of single ended traveling wave method is combined with the reliability advantage of time-domain method.Through EMTDC simulation,the validity of the method is verified in this paper.
DC transmission linedouble data sourcefault locationtime domain methodtraveling wave methodtime domain fault analysis method
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