Fault restoration by optimizing switch configuration in distribution systems

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Abstract
This paper describes a method of finding the optimal restoration configuration of inter‐feeder switches in a faulted distribution system. A feeder in a distribution system usually has several interfeeder switches properly located along the feeder to link it with other feeders. Under emergency situations, these switches are operated independently to minimize the loss of load and to prevent the distribution feeders from being overloaded or unbalanced. A computer program is developed to restore the faulted system by applying the binary integer programming (BIP) technique to find the optimal switching decisions by minimizing the objective function, which is defined according to the relief of feeder overloading and unbalance. A distribution system comprised of several substations in the Taiwan Power Company (Taipower) was selected for the simulation of optimal switching and to verify the accuracy and efficiency of this algorithm.

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