The Optimized Combination of Fault Location Technology Based on Traveling Wave Principle

The accuracy and the reliability of modern D-type double-ended and A-type single-ended traveling wave fault location principles used for transmission lines is comprehensively evaluated. Based on the evaluation, this paper presents the idea of optimized combination of location based on these two traveling wave principles, and successfully applies the idea in actual fault analysis of transient traveling waves. Compared with the traveling wave location schemes based on D-type or A-type principle alone, this scheme has the greatest advantages of utilizing the A-type traveling wave principle to verify and correct the location results obtained with the D-type traveling wave principle, so that both the location reliability and accuracy are enhanced. Practical applications showed that the optimized combination of traveling wave location schemes is feasible, and the location precision is improved significantly.