Optimal Planning of Fault Current Limiters for Recloser-Fuse Coordination in Distribution Systems with DGs.

Document Type : Research Studies

Authors

1 Electrical Engineering Department, Mansoura University, Mansoura 35516, Egypt

2 Electrical Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Abstract

 In this paper, the fault current limiter (FCL) is used to restore the coordination between the protection devices in distribution systems with high-level of DG penetration. The FCL allocation may be described as an optimization problem involving multiple objective functions which are contradictory and of different dimensions. So, it is formulated as a multi-objective constrained nonlinear programming problem. The interaction among different objectives gives rise to a set of compromised solutions, largely known as the Pareto-optimal solutions. The objectives are to simultaneously minimize: the increase in fault current levels due to the penetration of DG, voltage sag, and the total cost (size) of required limiters. The optimization problem is solved using Particle Swarm Optimization (PSO). The method is applied to two distribution test systems. Effects of different operating factors are assessed and comparative analysis of results is provided.

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