access icon free Medium- and low-voltage planning of radial electric power distribution systems considering reliability

© The Institution of Engineering and Technology
Received 15/09/2016, Accepted 07/04/2017, Revised 22/02/2017, Published 25/04/2017

This study proposes a new methodology to carry out distribution network planning considering medium-voltage (MV) and low-voltage (LV) systems. The integrated planning problem of a MV/LV distribution system is formulated as a mixed-integer non-linear program and aims at minimising investment (substations, transformers, conductors, poles, and structures), operating, and reliability costs. The coupling constraints between MV/LV networks are represented by MV/LV modelling transformers through the power flow equations. The mathematical model is solved by the general variable neighborhood search metaheuristic method, which allows us to explore the search space through intensification and diversification criteria. The proposed methodology is applied in a system with 50 buses at the MV level and 410 buses at the LV level.

Inspec keywords: search problems; integer programming; nonlinear programming; power distribution planning; power distribution reliability; load flow

Other keywords: radial electric power distribution systems; mixed-integer nonlinear program; low-voltage planning; medium-voltage planning; variable neighborhood search metaheuristic method; power flow equations; distribution network planning

Subjects: Power system planning and layout; Distribution networks; Combinatorial mathematics; Optimisation techniques

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