Journal
ELECTRIC POWER SYSTEMS RESEARCH
Volume 114, Issue -, Pages 136-145Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.epsr.2014.03.033
Keywords
Low-voltage micro grid; Droop control; Inverter control; Reactive power dispatch; Frequency restoration; Secondary control
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The first part of this work introduced a control architecture for a low-voltage AC microgrid with distributed battery energy storage working in isolated mode. A primary control layer, based on applying decoupled droop control methods to the inverters, was proposed and analyzed, demonstrating its capability to share power and keep frequency and voltage within prescribed ranges under load changes. This second part of the work extends the analysis of the primary control actuation and proposes a secondary control layer, supported over a communications network, to add improvements such as local reactive power dispatching and nominal frequency and voltage restoration. (C) 2014 Elsevier B.V. All rights reserved.
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