Fault current limiter （FCL） is a promising solution to limit the fault current of large scale power grid.With the application of FCL

which location can be selected to install FCL is becoming another problem.A new concept of branch correlation degree and correlation factor was proposed in this paper

and a new method of branch correlation degree was adopted to find the potential location of FCL.The relationship formula between the target short-circuit current and limiting reactance was deduced by the application of Thevenin’s theorem and linear superposition principle.The limiting reactance can be calculated conveniently with this formula which can be employed to evaluate the effectiveness of FCL locations selected according to the method of branch correlation degree.Then different FCL installation location schemes can be established through different location combinations.