Assessing the impact of protection system malfunctions on the power transmission system
Abstract
Apowertransmissionsystemreferstomeansoftransmittingpowerfromageneratingsourceto
variousloadcenters.
InUganda,UgandaElectricityTransmissionCompanyLimited(UETCL)isresponsibleforpower
transmissionwhichitthensellstoUmemewheretheendusersareserved.
ThehighvoltagesatwhichpoweristransmittedcurrentlyinUgandaare;66KV,132KVand
220KV,the400KVisbeingestablishedbutnotyetcommissioned.
Thenetworkisprotectedbyvariousprotectionschemeswhichinclude;overcurrent,distanceand
differentialprotectionandothers.Intheduecourseofoperation,protectionsystemmalfunctions
occur,thusthereisaneedtoanalyzethesemalfunctionsinordertoassesstheirimpactonthe
powertransmissionsystemandinthisstudy,wearefocusingontheirimpactonthepower
transmissionsystemreliability.
OurcasestudyisKawandasubstation,andafterouranalysis,weshallgaugethereliabilitylevel
ofourpowertransmissionsystemandthereforesuggestsomemeasuresthatcanbeundertaken
thereafter.