Abstract
Large scale application of intermittent energy resources in power grid has been resulting in significant impacts on power flow, voltage profile and system stability. In this paper, a novel coordinate scheduling approach in multi time scales is proposed. The approach handles problems in both integrated transmission grid with distribution grid. On one hand, it gradually mitigates adverse effects caused by the uncertain output power of intermittent energy resources through hierarchical coordination and stepwise refinement in muti time scales. On the other hand, it makes full use of flexible and available power scheduling resources in both transmission grid and distribution grid to achieve the goal of economical and secure operation adaptive to high penetration of intermittent energy resources. Finally, a study case is established to demonstrate the advantages taken by the approach on intermittent energy resources accommodation and system stability margin improvement.
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