Based on the multi-infeed short circuit ratio，the influence on multi-infeed short circuit ratio caused by current limiting measures is analyzed

and a mathematical model of multi-objective optimization for short-circuit current limitation schemes is developed. The objective functions considering the voltage support ability

the costs of limitation schemes and short-circuit capacity margin are presented. The procedure of optimizing short-circuit current limitation schemes in multi-infeed DC systems is presented as follows. Firstly

using a branch screening strategy to reduce the dimensions of the decision variables. Then

the nondominant sorting genetic algorithm Ⅱ is used to find the Pareto optimal solutions. Simulation results of actual power grid planning show that the model proposed has good applicability.