Publication Date: Research Org.: Pacific Northwest National Lab. Office of Electricity Delivery and Energy Reliability (OE) of Energy (DOE), Washington DC (United States). (Virginia Tech), Blacksburg, VA (United States). School of Electrical Engineering and Computer Science Virginia Polytechnic Inst.
Energy Science and Technology Directorate This work will present a method of augmenting primary frequency controls to support the switching transients necessary for the operation of networked microgrids, without the need to over-size rotating machines. While the low-inertia of these microgrids can be increased by over-sizing the rotating generators, the increased capital and operating costs can become a barrier to deployment. The issue of dynamic stability is especially acute in microgrids with high penetrations of inverter-connected generation, and a correspondingly low system inertia. While there are benefits to networking the operations of resiliency-based microgrids, the switching operations that they require introduce transients which can result in a loss of dynamic stability.
By networking microgrids during extreme events, it is possible to share resources, increase the duration for which they can operate islanded, and increase the resiliency of critical end-use loads.
Building on the performance of individual microgrids during extreme events, there has been an increasing interest in the operations of network microgrids. Individual microgrids have proven their ability to provide uninterrupted power to critical end-use load during severe events.
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