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Dynamic performance of a low voltage microgrid with droop controlled distributed generation

Papadopoulos, Theofilos and Papadopoulos, Panagiotis and Papagiannis, Grigoris and Crolla, Paul and Roscoe, Andrew and Burt, Graeme (2013) Dynamic performance of a low voltage microgrid with droop controlled distributed generation. In: 2013 IEEE Power and Energy Society (PES) General Meeting, 2013-07-22 - 2013-07-25.

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Microgrids are small-scale highly controlled networks designed to supply electrical energy. From the operational point of view, microgrids are active distribution networks, facilitating the integration of distributed generation units. Major technical issues in this concept include system stability and protection coordination which are significantly influenced by the high penetration of inverter-interfaced distributed energy sources. These units often adopt the frequency-active power and voltage-reactive power droop control strategy to participate in the load sharing of an islanded microgrid. The scope of the paper is to investigate the dynamic performance of a low voltage laboratory-scale microgrid system, using experimental results and introduce the concept of Prony analysis for understanding the connected components. Several small disturbance test cases are conducted and the investigations focus on the influence of the droop controlled distributed generation sources.