| dc.description.abstract | In 2005, low rainfall levels resulted in a significant deficiency in generation compared to demand.
Government policy thus prioritized the development of new plants and the diversification of
generation to reduce the country’s dependence on the Nalubaale power station. Since then, several
Distributed Energy Resources (DER’s) have been installed on Uganda’s network in a bid to
supplement Uganda’s installed generation capacity and also diversify the energy mix. However,
they provide another critical benefit when operated in island mode, through reduction of the impact
of Low Probability-High Impact (LPHI) fault events that could lead to widespread blackouts. The
networks ability to detect, withstand and recover from effects of LPHI events is power system
resilience. This research therefore focuses at quantifying the contribution of Distributed Energy
Resources to power system resilience as modelled in DigSilent. Three scenarios were considered
i.e. (i) Low Probability High Impact (LPHI) on current network with Existing DER’s and no
reconfiguration made (Base case), (ii`) LPHI event on Current network with existing DER’s and
reconfiguration made (Scenario 1), (iii) LPHI event on current network with both existing and
Future DER’s and reconfigurations made (Scenario 2). Results showed that power system
resilience improved from the base case by 35.4% and 52.2% in scenario 1 and 2 respectively.
Expressing resilience benefits in cost terms showed that $3,223,042.05 and $10,378,544.83 could
be additional sales of power in scenario 1 and scenario 2 respectively. Henceforth, exploitation of
DGs can improve the resilience of the Uganda power system network to LPHI events through
continued power supply during power outages. | en_US |
