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NovelandsimpleschemeforMicro-Gridprotectionbyconnectingits
loads neutralpoints:AreviewonMicro-Gridprotectiontechniques

Research Abstract
ThelowfaultcurrentphenomenainthestandaloneMicro-Grid(MG)isaresultofelectronicinterfacingof theMGDistributedGenerators(DGs).DuetolowfaultcurrentphenomenaonthestandaloneMG,thereis a difficultyindifferentiatingbetweenthefaultdisturbanceandtheoverloadconditions.Thispaperpre- sentsacomprehensivesurveyaboutthestandaloneMGprotectionissuesandschemes.Allnewtrendsand schemesavailableandsuggestedforMGprotectionduringboththegridconnectedandthestandalone modesaredescribedindetails.Also,thispaperpresentsasimpletechniqueforsolvingtheproblemsdueto lowfaultcurrentphenomenainthestandaloneMG.Theproposedtechniqueisimplementedbycon- nectingallMGloadsneutralpointswiththeMGearthingsystemneutralline.Theproposedtechnique suppressesthetouchvoltagesatallMGbuses.Also,theproposedschemeresultsindoublingtheMGfault currentinthestandalonemode.Consequently,theMGprotectiondevicescaneasilydetectanddiffer- entiatebetweenthefaultdisturbancesandtheoverloadconditions.Also,theproposedtechniquedamps andsuppressesthetouchvoltagenotonlyatfaultlocationbutalsothroughalltheMGnetworkbuses.The mostcommonfaulttypes(singlephasetogroundanddoublephasetoground)areanalyzedindetails. Resultsprovedthat,employingtheproposedtechniqueabletosolvethelowfaultcurrentandthetouch voltagesproblemsfromtheirroots.Noadditionalhardwareisrequiredforimplementingthenewscheme. Theproposedtechniqueisverysimpleandhighlyeconomicalattractive.
Research Authors
Rashad M.Kamel a,b,n, MohammadA.Alsaffar a, M.K.Habib a
Research Department
Research Journal
RenewableandSustainableEnergyReviews
Research Pages
pp. 931–942
Research Publisher
NULL
Research Rank
1
Research Vol
NULL
Research Website
NULL
Research Year
2016