In order to solve the configuration problem of fault current limiter in power grid

an optimal configuration method of fault current limiter based on virtual branch method is proposed. Through the virtual branch processing of the bus connection

the fault current limiter installed in the branch and bus connection is optimized simultaneously. The current limiting cost and current limiting effect of fault current limiter are taken as the optimization objectives and the node short-circuit current and the reactance value of a single fault current limiter are taken as the constraint conditions to establish a multi-objective optimization model after taking the number

impedance value and installation location of fault current limiter into comprehensive consideration. Combined with the improved immune algorithm

an optimal scheme under the consideration of current limiting cost and current limiting effect is obtained. Finally

IEEE39 node standard network is analyzed to verify that this method can obtain a more comprehensive and more suitable optimization scheme than the one only considering the line installation case on the premise of ensuring the universality of the solution model

and the improved immune algorithm can converge to the optimal solution better than before.