Multi-Criteria Optimization of the Functionning of a Distribution Network in Normal Operating Regime

Abstract

The growth of loads on distribution networks and the delay in investment in energy field are driving power systems operators to operate their power grids beyond allowed limits. This mode of operation of the networks generates more distribution losses and violations of the normative voltage ranges. This paper presents the multi-objective optimization of electrical distribution network operation under operational and safety constraints. Since load-flow analysis is the basis for any optimization and planning, and given that radial topology of distribution networks are characterized by high R/X ratio and imbalances, are not adapted and converge with difficulty. An algorithm based on the "backward – forward sweep" principle is developed in MATLAB environment for permanent network regime computation and is tested on a IEEE 33-bus network before it is applied to a 41-bus network of the Beninese Society of Electrical Energy (SBEE). The genetic algorithm (NSGA II) is implemented to optimize the operation of distribution network and the proposed model implemented in MATLAB made it possible, from the reference data of the SBEE test network, to minimize the losses and to reduce the voltage drops under thermal constraints of the conductors.
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