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Control and management of a microgrid and the use of Droop control

Wilson, Travis (2015) Control and management of a microgrid and the use of Droop control. Other thesis, Murdoch University.

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Microgrids are a group of distributed generation systems that enable the support of local loads and have the ability to connect and disconnect to the main electrical utility grid. To respond to the increase in electrical power requirements from the customer base, Microgrids are a useful method of achieving network expansion, but have a number of protection issues related to reliability of supply, which is why the need of some form of microgrid control is required. This thesis report includes an analysis of droop control methods for control of a microgrid when connected to the distributed network, and when operating in islanded mode. The microgrid control strategies investigated as part of this report included an initial analysis of the various methods, and a more detailed analysis of synchronous generator control, including cooperative droop. This method has an improved response in regards to voltage regulation, frequency regulations and active power sharing. The use of droop control including primary and secondary control, to ensure the reliability of the network supply in the event of minor disruption includes events such as a load increase or decrease and larger disruptions that occur such as the loss of a generator, or the main electricity grid. It was found through the investigation of the governor control and the use of power-frequency droop control, that active power and frequency remained within the defined parameters of as set by the standard. Voltage regulation did have some events that caused the Distributed Generation (DG) voltage to exceed the limits, which is attributed to the grid-restoration event and would benefit from further investigation into control methods that would better support these types of events.

Item Type: Thesis (Other)
Murdoch Affiliation(s): School of Engineering and Information Technology
Supervisor(s): Crebbin, Gregory
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