%0 Journal Article
%T Modelling and Simulation of Performance of the Microgrid Frequency Stability Control during Unplanned Islanding: The Case Study of Mwenga Hydropower
%A Eligard Kyaruzi Francis
%A Arthur M. Omari
%A John P. John
%J Smart Grid and Renewable Energy
%P 160-171
%@ 2151-4844
%D 2022
%I Scientific Research Publishing
%R 10.4236/sgre.2022.137010
%X <span style=\"font-family:Verdana;\">A grid connected microgrid connects to the grid at a point of common</span><span style=\"font-family:&quot;\"><span style=\"font-family:Verdana;\"> coupling. Due to the great inertia of the grid which accelerates and
decelerates the generator when its frequency tends to deviate, the grid connected
microgrid operates at a frequency of the infinity bus. Frequency instability is
one of the major challenges facing the grid connected microgrid during islanding.
The power demand variation causes the variation in rotor speed, resulting to
frequency deviation. Frequency can be brought back to standard by varying the </span><span style=\"font-family:Verdana;\">power generation to match with the varying load.
The performance of the frequency stability control system at Mwenga
hydroelectric microgrid has</span><span style=\"font-family:Verdana;\"> been studied. Through site visitation, the
power demand and generation status data were collected and analysed for model
preparation. The results of the study indicate</span></span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">that, during islanding, the Mwenga rural
electrification project is observed to be subjected to power imbalance which
leads to frequency instability. Although the frequency control system tries to
keep the system at a nominal frequency by maintaining the continuous balance
between generation and varying load demand, however the system still operate</span><span style=\"font-family:Verdana;\">s</span><span style=\"font-family:Verdana;\"> with large magnitude of
overshoot, undershoot and longer settling time.</span>
%K Modelling
%K Frequency Stability
%K Unplanned Islanding
%K Mwenga
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=118728