Optimal partitioning of smart distribution systems into supply-sufficient microgrids
Journal article, Peer reviewed
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Original versionIEEE Transactions on Smart Grid. 2018, 1-10. 10.1109/TSG.2018.2803215
This paper presents a systematic procedure for partitioning smart distribution systems into supply-sufﬁcient microgrids. Firstly, renewable distributed generations (DGs) are optimally allocated in the distribution system. A multiobjective performance index including voltage proﬁle and energy losses indices is utilized in this problem as the objective function. Two alternative control approaches of future smart grids including on load tap changer (OLTC) control and adaptive power factor control (PFc) are assessed to maximize potential beneﬁts and increase the penetration level of DGs. Then, optimal allocation of protection devices and energy storage systems (ESSs) for constructing supply-sufﬁcient microgrids is presented for a feeder equipped with capacity-constrained DGs. To this end, two different optimization problems are formulated and proper indices are developed for minimizing power exchange between microgrids and minimizing generation-load imbalance within microgrids. Finally, test results of the proposed models on 33-bus IEEE radial distribution system are presented and discussed.