The noncommutation operation mode is commonly utilized in distribution network, but there exist threephase unbalanced loads resulting in line parameter imbalance. This situation brings some difficulties into the fault location. In this paper, a new fault location algorithm is proposed for radial distribution networks. Just singleended fault information is considered to realize the accurate fault location. Firstly, a network matrix is employed to study the distribution network structure and the calculation complexity is reduced. Then, the Fibonacci (Fibonacci) sequence search method is adopted to speed up the fault point searching process. Finally, PSCAD/ EMTDC is utilized to model a typical distribution network under different fault types. It is shown that the presented algorithm is able to identify fault locations with high accuracy.