Models for conductor size selection in Single Wire Earth Return distribution networks

Abstract

The use of the ground as the current return path often presents planning and operational challenges in power distribution networks. This study presents optimization-based models for the optimal selection of conductor sizes in Single Wire Earth Return (SWER) power distribution networks. By using mixed integer non-linear programming (MINLP), models are developed for both branch-wise and primary-lateral feeder selections from a discrete set of overhead conductor sizes. The models are based on a mathematical formulation of the SWER line, where the objective function is to minimize fixed and variable costs subject to constraints specific to SWER power flow. Load growth over different time periods is considered. The practical application is tested using a case study extracted from an existing SWER distribution line in Namibia. The results were consistent for different network operating scenarios.

Potential for Increased Rural Electrification Rate in Sub-Saharan Africa using SWER Power Distribution Networks

“…Further, note that instead of using single 200 kVA transformer, the design has chosen two transformers rated 100 kVA each (Table 6). Bakkabulindi et al (2013) specified ACSR for Uganda SWER network, similarly this paper chooses the same for Homboza. All these specifications and other materials are displayed in Table 6.…”

Selección óptima de conductores en sistemas de distribución empleando el algoritmo búsqueda tabú

“…Dentro de los trabajos más destacados en este campo se resalta la aplicación de algoritmos heurísticos [6][7], técnicas de optimización combinatorial como algoritmos genéticos [4] y estrategias evolutivas [8][9][10]. Otros autores han propuesto modelos lineales [11] y no lineales [12] para representar el problema, los que son resueltos por medio de técnicas exactas disponibles en software de optimización comercial.…”