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Demand dispatch of an islanded microgrid

Jian, Jiuhe (2017) Demand dispatch of an islanded microgrid. Honours thesis, Murdoch University.

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As the air pollution has become a serious problem, there is an increasing number of renewable source generators used in the electrical grid system, especially in microgrid system. Microgrid system usually including distributed generator resources, client loads and commercial loads, etc. And it also can be switched between grid-connected mode and island mode. For a large-scale microgrid is more stable than a small-scale microgrid, and it will not have affected by the fluctuations of voltage and frequency. In recent years, as an old technique, demand response has been widely used to control and limit the load so that the demand matches the generation. In this paper, demand dispatch as a new technique has been analyzed which is not only decrease the loads when the supply is limited but also add some extra loads when the generation capacity is increased. Droop control methods are considered as the most effective strategy in Demand response and Demand Dispatch. The droop control method is related to the load changes in microgrid system, and output power can be adjusted by droop control automatically. According to the characteristics of the equation of droop control, the number of loads can be curtailed or added when the generated power change happens. Moreover, a typical microgrid system has been built base on ETAP software; some case studies results have presented the frequency control method was successful for the demand control.

Item Type: Thesis (Honours)
Murdoch Affiliation(s): School of Engineering and Information Technology
Supervisor(s): Shahnia, Farhad
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