基于最优分段的城市中压配电网接线模式研究

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1、ABSTRACTDistributionnetworklocatesattheendofpowersystem．DLietoitsdirectconnectionwithusers，thequalityandabilityofpowerisguaranteedbyit．ConnectionmodesurethebasicreflectionofdistributionnetworkstruetnrewhichiSthefocusoftheurbandistributionnetworkplanningandrebuildin

2、g．Inorder"COrealizetheseenreandeconomicaloperationofthedistributionnetwork,itisnecessarytomakesomeresearchesonnetworkstructureundertheconditionofdifferentIoaddensityandsubstationcapacity，whichcanofferusefulreferencesfor廿lepowersystemplannersandoperators．Inthispaper

3、,undertheconditionofdifferentloaddensityofpower-supply∞％anddifferentsubstationcapacity,raliabilityofsometypicalconnectionmodesfordistributionsystem’Soverheadlinesandcablesiscalculated，AndbasedODthis．theeconomicresultsofoutagelossarealsocalculatedandanalyzedtostudyt

4、heirtrendwiththevarianceofloaddensityandsubstationcapaeity．Thedifferencesbetweentheseconnectionmodesunderthesameconditioncabbeknowntiomthecomparison”sulLSomeconnectionmodesalerecommendedaccordingtodi任brentca鞴s．AnewmethodofoptimalsectionfordistributionnetworkiSputfo

5、rward．Accordingtotherelationshipbel：wcenreliabilityandeconomy,alloptimalsectioncalculatingmodelforconnectionmodesofmid-voltagedistributionsystemisestablished．nmresultsofoptinmlsectionofconnectionmodesfordistributionsystemsateanalyzedthrou豇thesection-costprofileandf

6、ormsabouttherelationshipbetweenoptimalsectionnumbersandradiusofpowersupplyarcproposed．ThensensitivityanalysisOBoptimalsectioncalculatingmodelarealsoprovided．Therearedifierentkindsof10adSexistingintheurbandistdbutionnetwork．Inordertomaketheresearchofcormeetionmodesm

7、orepractical，reliabilityandeconomyandthedistributionregularityofoptimalsectionnumbersfordifferentkindsofloadsareanalyzed．Accordingtotheclassificationmethodofdifferentloadsmadebypowerdepartment,thecorrespondingmethodforoutagelosscalculationisputforward．Thenbasedonth

8、is，loadsoftypicalsmalldistrictiscomputedanditsoptimalsectionresultsa∞alSOachieved．KEYWoRDS：medium-voltagedistributionnetwork,connectionmodes．opti