With the increasing interconnection of distributed generators in distribution networks

some of the existing fault location algorithms may fail. A fault location method based on the minimum 2-norm of voltage deviation vectors is proposed. Firstly

the fault current is injected into each bus of the distribution network model to calculate the voltage variation of the power source. Secondly

the difference between measured voltage variation and calculated voltage variation is analyzed

and the fault current injected bus corresponding to the minimum difference is searched and determined as the first bus of the fault section. Finally

the other bus of the fault section is determined according to the variation trend. An IEEE 34-bus system is chosen to verify the algorithm

the results showing that the algorithm has clear physical meaning

simple calculation process and good fault location accuracy. The more distributed generation is connected

the better fault location accuracy will be. This work is supported by National Natural Science Foundation of China (No. 51307059)

Hebei Provincial Natural Science Foundation of China (No. E2014502065)

Fundamental Research Funds for the Central Universities (No. 2014MS86)

and National Basic Research Program of China (973 Program) (No. 2012CB215200).