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Planning the expansion of distribution systems (DS) is a nonlinear and combinatorial problem that combines technical and regulatory constraints. Commonly, the planning of DS is intended to achieve a radial topology to reduce its complexity. However, in a smart-grid context, distribution feeders are subject to reconfigurations to transfer load between feeders in failure events, or to compensate for...
Given the relatively new context in which Distributed Geeneration (DG) is inserted in distribution systems, for certain aspects of the operation of this type of system there are relatively few studies of power quality considering the presence of DG. One of these aspects is certainly the possibility of DG operating under unbalanced three-phase operating conditions, which is quite common in distribution...
This paper presents an overview of the minimal complexity level requirement for modeling generic grid-interactive inverter to conduct power flow, protection, stability and power quality studies. For each functional, control or protection block of the inverter system, it describes the appropriate level of complexity needed to perform each of the power system studies. This work serves as a foundation...
The implementation of high-reliability microgrids requires proper protection schemes that effectively function in both grid-connected and island modes. This paper presents a communication-assisted four-level hierarchical protection strategy for high-reliability microgrids, and tests the proposed protection strategy based on a loop structured microgrid. The simulation results demonstrate the proposed...
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