Abstract: Recent short-circuit current limiters normally present zero impedance and don’t affect the operation of power grid.When confronted with system fault,impedance of limiters will increase rapidly to limit short-circuit current to ensure fault current staying below the breaker interrupt capacity.The optimal configuration for the short-circuit current limiters is studied,in which the self-impedance sensitivity weighted sum is used as an index to evaluate the current limiting effect,and the branch-adding method is applied to greatly reduce the calculation of optimization process.A fast calculating global optimization algorithm for configurating ultra-high voltage short-circuit current limiters is proposed with particle swarm optimization（PSO） modeling and corresponding adaptive function.The planning operating modes of Guangdong Grid in 2015 are calculated and analyzed by using the algorithm proposed,and corresponding optimal configuration scheme is obtained for ultra-high voltage short-circuit current limiters.