Design Optimization of a Hybrid Energy System Through Fast Convex Programming

Ronald Clark (University of the Witwatersrand); Willem Cronje and Michael Van WYk (University of the Witwatersrand, South Africa)

In this paper, a methodology for the optimal economic design of a hybrid energy system is presented. The novelty of the proposed methodology lies in the fact that a convex optimisation approach is used - allowing a solution to be found very efficiently compared to existing techniques. First, a simulation model for a grid-connected PV/wind/diesel hybrid system is implemented in Mathworks (TM) Simulink. Using this simulation model, it is shown that the design problem under consideration is indeed convex. An interior-point convex solver is then used to design a sample PV/wind/diesel system for a small university campus and the results compare favourably to those obtained using the closed-source HOMER software package which is based on slow discrete combinatorial optimization.

Journal: International Journal of Simulation- Systems, Science and Technology- IJSSST V15

Published: Jun 30, 2014

DOI: 10.5013/IJSSST.a.15.03.02