A new hybrid multi-objective quick service restoration technique for electric power distribution systems

This paper presents a New Hybrid Multi-Objective Quick Service restoration (QSR) technique for Electrical Power Distribution Systems (EPDS). The main features of this new technique includes the development New Network Connectivity Method, objective function formulation with the consideration of various constraints in addition to the Priority Based Load Constraints and the incorporation of Service Restoration Time Estimation which helps the Electrical Power Distribution Engineers (EPDE) to restore the supply in minimum time. In order to satisfy various operational constraints while restoring the power supply to the consumer localities, the capacity of Transformer/Feeders in the post fault distribution network creates a serious problem to the EPDE and Distribution System Substation Operators (DSSO). Hence, the Electric Power Service Restoration Problem (EPSRP) becomes a nonlinear, combinatorial, non-differential and multi-objective optimization problem with several constraints. The solution to this multi-objective optimization problem has been obtained using a New Hybrid Method. A Computer program has been developed to solve this EPSRP. The validity of this new approach bas been tested on the various EPDS viz., 12-Bus, 15-Bus, 16-Bus, 26-Bus, 29-Bus, 33-Bus, 69-Bus, 79-Bus and 133-Bus systems. The fast and effective convergence of this approach helps to find the Optimal Operating Condition for the QSR of EPDS. The results reveal that it is a highly suitable technique for use in Service Restoration Procedures of Distribution Automation Systems (DAS). (c) 2006 Elsevier Ltd. All rights reserved.