A dissertation submitted to the Faculty of Engineering and the Built Environment,
University of the Witwatersrand, in ful lment of the requirements for the degree of
Master of Science in Engineering.
Johannesburg, 2016 / This research investigates the power sharing between distributed energy resources
with voltage and frequency droop control. A case study based on voltage sources
in an islanded microgrid is set up in the laboratory, referred to as: The Example
Microgrid. The Example Microgrid consists of two synchronous generators, active
and reactive power loads.
A simulation model is constructed based on the laboratory set-up, where componentwise
and system-wise testing are completed. The simulation results are validated
with the experimental set-up, and it is concluded that the model accurately represents
the physical system under steady-state conditions. Further simulation studies
on conventional droop controllers are conducted based on the Example Microgrid
model. The results indicate that the use of conventional droop control is inappropriate
for small, low-voltage islanded microgrids.
As a possible application of this work, three variations of adapted droop controllers
are simulated and their performance evaluated. It is found that with the adapted
droop controllers, the power sharing error can be minimised / M T 2016
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:wits/oai:wiredspace.wits.ac.za:10539/21052 |
| Date | January 2016 |
| Creators | Wu, Meng-Chun Merelda |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | Online resource (146 leaves), application/pdf, application/pdf |
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