In this paper, a distributed convex optimization framework is developed for energy trading between islanded microgrids. More specifically, the problem consists of several islanded microgrids that exchange energy flows by means of an arbitrary topology. Due to scalability issues, and in order to safeguard local information on cost functions, a subgradient-based cost minimization algorithm is proposed that converges to the optimal solution in a practical number of iterations and with a limited communication overhead. Furthermore, this approach allows for a very intuitive economics interpretation that explains the algorithm iterations in terms of "supply-demand model" and "market clearing". Numerical results are given in terms of convergence rate of the algorithm and attained costs for different network topologies.
Finally, the prices of MG1 in this paper and REF converge to the same value.
Distributed Energy Trading: The Multiple-Microgrid Case
IEEE Transactions on Industrial Electronics, vol. 62, no. 4, pp. 2551-2559, Apr. 2015
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