Optimal merging of primary and secondary power distribution systems considering overall system cost and reliability

Feeder reconfiguration has been researched from past few years for optimal planning of primary power distribution system (PDS) with objectives of minimizing the overall system cost and power loss. Till now the research work done for simultaneous reconfiguration of the secondary with primary PDS are very less. The proposed methodology incorporates both primary and secondary reconfiguration simultaneously with a single objective framework (weighted aggregation of both cost and reliability into account) including the position of tie and the sectionalizing switches. In this paper the parameters of a novel human randomized search method called Seeker optimization algorithm (SOA) is used for planning purpose. And, is modified based on position of status of switches by changing the population in a binary array and make a shift operator to change the position of switch to make a new population to construct binary coding SOA for feeder reconfiguration of both primary and secondary network simultaneously. For reliability purpose a contingency-load-loss-index is used. Related results are shown by the use of the proposed methodology for a real case of a residential primary and secondary network consisting of 75 electrical nodes.