Investigation into the steady-state load sharing of weak sources in a low voltage three-phase islanded microgrid
Date
2016
Authors
Wu, Meng-Chun Merelda
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
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
Description
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
Keywords
Citation
Wu, Meng-Chun Merelda (2016) Investigation into the steady-state load sharing of weak sources in a low voltage three-phase islanded microgrid, University of Witwatersrand, Johannesburg, <http://wiredspace.wits.ac.za/handle/10539/21052>