基于解列補償法的多電源配電網(wǎng)潮流分析基于解列補償法的多電源配電網(wǎng)潮流分析

摘要：

隨著城市化進(jìn)程的不斷加速，現(xiàn)代城市配電網(wǎng)面臨著越來越嚴(yán)峻的挑戰(zhàn)。傳統(tǒng)的單電源配電網(wǎng)已不能滿足發(fā)展需求，為了進(jìn)一步提高配電網(wǎng)的可靠性和穩(wěn)定性，多電源配電網(wǎng)逐漸被廣泛采用。在多電源配電網(wǎng)中，各個電源之間的協(xié)調(diào)配合是保障整個配電網(wǎng)安全運行的重要保障，同時也很大程度上決定著電力質(zhì)量的優(yōu)劣。因此，如何準(zhǔn)確地分析多電源配電網(wǎng)的潮流特性，對于保證配電網(wǎng)的可靠性和穩(wěn)定性至關(guān)重要。

本文將介紹基于解列補償法的多電源配電網(wǎng)潮流分析法。首先對多電源配電網(wǎng)的結(jié)構(gòu)和工作原理進(jìn)行了簡要介紹，然后詳細(xì)講解了解列補償法的基本原理和在多電源配電網(wǎng)中的應(yīng)用。在潮流計算過程中，本文利用了解列補償法和高斯-塞德爾迭代法相結(jié)合，同時考慮配電網(wǎng)中各個電源的功率因數(shù)，進(jìn)一步提高了潮流計算的準(zhǔn)確性和可靠性。最后，本文通過實驗仿真驗證了基于解列補償法的多電源配電網(wǎng)潮流分析法的有效性。

關(guān)鍵詞：多電源配電網(wǎng)，解列補償法，潮流分析，功率因數(shù)，高斯-塞德爾迭代法。

Abstract:

Withtheaccelerationofurbanization,modernurbandistributionnetworkfacesmoreandmoreseverechallenges.Traditionalsingle-sourcedistributionnetworkcannolongermeetthedevelopmentneeds.Inordertofurtherimprovethereliabilityandstabilityofdistributionnetwork,multi-sourcedistributionnetworkisgraduallybeingwidelyused.Inmulti-sourcedistributionnetwork,thecoordinationbetweendifferentpowersourcesisanimportantguaranteeforensuringthesafeoperationoftheentiredistributionnetwork,andalsolargelydeterminesthequalityofpower.Therefore,itisessentialtoaccuratelyanalyzetheflowcharacteristicsofmulti-sourcedistributionnetworktoensurethereliabilityandstabilityofdistributionnetwork.

Thispaperpresentsaflowanalysismethodbasedonthecompensationofslack-busbyeliminated-busmethodinmulti-sourcedistributionnetwork.Firstly,thestructureandworkingprincipleofmulti-sourcedistributionnetworkarebrieflyintroduced,thenthebasicprincipleoftheeliminated-busmethodanditsapplicationinmulti-sourcedistributionnetworkaredescribedindetail.Intheflowcalculationprocess,thispapercombinestheeliminated-busmethodwithGauss-Seideliterationmethod,andconsidersthepowerfactorofeachpowersourceinthedistributionnetwork,whichfurtherimprovestheaccuracyandreliabilityofflowcalculation.Finally,theeffectivenessoftheflowanalysismethodbasedoneliminated-buscompensationmethodinmulti-sourcedistributionnetworkisverifiedbyexperimentalsimulation.

Keywords:Multi-sourcedistributionnetwork,eliminated-busmethod,flowanalysis,powerfactor,Gauss-SeideliterationmethodWiththeincreasinguseofrenewableenergysourcesindistributionnetworks,thetraditionalflowanalysismethodshavebecomeinsufficienttoaccuratelyhandlethemulti-sourcenatureofthesystem.Toovercomethisissue,theeliminated-buscompensationmethodhasbeenproposed,whichcansignificantlyimprovetheaccuracyofflowanalysis.

Theeliminated-buscompensationmethodusesacompensationnetworktoeliminatetheinfluenceofloadsonthebusvoltages,thusobtainingtheaccuratebusvoltages.Byapplyingthismethod,theflowcalculationaccuracycanbeimproved,andtheresultsaremorereliable.

Moreover,thepowerfactorofeachpowersourceinthedistributionnetworkisalsoconsideredintheflowanalysis.Thisisimportantbecausethepowerfactoraffectsthevoltagelevelofthesystem,andthus,theaccuracyofflowanalysis.Byincorporatingthepowerfactor,theflowanalysisbecomesmorepreciseandrealistic.

TheGauss-Seideliterationmethodisusedfortheflowanalysisoftheeliminated-buscompensationmethod,whichisanefficientandaccuratealgorithmforsolvingpowerflowequations.Thismethodisusedtocalculatethebusvoltagesandbranchcurrentsinthesystem,anditconvergesfasterthanotheriterativemethods.

Finally,theeffectivenessoftheflowanalysismethodbasedontheeliminated-buscompensationmethodisverifiedbyexperimentalsimulation.Thesimulationresultsshowthattheproposedmethodiseffectiveinaccuratelyanalyzingtheflowinmulti-sourcedistributionnetworks.

Inconclusion,theeliminated-buscompensationmethod,combinedwiththeGauss-Seideliterationmethodandconsiderationofpowerfactor,isaneffectiveandreliablemethodforflowanalysisinmulti-sourcedistributionnetworksMoreover,theproposedmethodhastheadvantageofbeingcomputationallyefficient,whichisimportantforpracticalapplications.Itnotonlyprovidesaccurateresultsbutalsoreducescomputationaltimeandresourcescomparedtoothermethods.

Inadditiontotheaboveadvantages,theeliminated-buscompensationmethodalsohastheflexibilitytohandlevarioustypesofloads,suchasconstantpower,constantimpedance,andconstantcurrentloads.Thisisbecausethemethodconsidersthepowerfactoroftheloadsandadjuststheflowaccordingly,makingitsuitableforuseinreal-worlddistributionnetworksthathaveamixofdifferenttypesofloads.

Furthermore,theeliminated-buscompensationmethodcanalsobeextendedtoanalyzemulti-phasedistributionnetworks.Withsomemodificationstotheequations,themethodcanhandlethree-phasesystemsandprovideaccurateresultsformulti-phasenetworksaswell.

Insummary,theeliminated-buscompensationmethodisapromisingtechniqueforflowanalysisinmulti-sourcedistributionnetworks.Itprovidesaccurateresultswhilebeingcomputationallyefficientandflexibleenoughtohandlevarioustypesofloadsandevenmulti-phasesystems.Themethodcancontributetotheoptimizationofdistributionnetworkplanningandoperation,whichisessentialforreducingenergylossesandimprovingpowerqualityOnelimitationoftheeliminated-buscompensationmethodisthatitassumeslinearloadsandidealpowersources.Inreality,loadscanbenon-linearandintermittent,andpowersourcescanhavevoltageorfrequencyvariations.Therefore,themethodmaynotaccuratelyreflecttheactualbehaviorofthedistributionnetworkundertheseconditions.However,therearewaystoovercometheselimitations.Non-linearloadscanbemodeledusingharmonicanalysis,andvoltageorfrequencyvariationscanbeincorporatedintothepowersourcemodels.Theseextensionscanprovideamorerealisticrepresentationofthedistributionnetwork,buttheyalsoincreasethecomputationalcomplexityofthemethod.

Anotherpotentiallimitationoftheeliminated-buscompensationmethodisitsrelianceontheassumptionofbalancedthree-phasesystems.Inpractice,distributionnetworksmaynotbeperfectlybalanced,andtheremaybevoltageorcurrentunbalancesthatcanaffecttheaccuracyofthemethod.However,therearetechniquestoaccountforunbalances,suchassequencecomponentanalysis,whichdecomposestheunbalancedsignalsintotheirpositive-,negative-,andzero-sequencecomponents.Themethodcanthenbeappliedseparatelytoeachsequencecomponent,providingamoreaccurateanalysisofthedistributionnetwork.

Despitetheselimitations,theeliminated-buscompensationmethodhasproventobeavaluabletoolforflowanalysisindistributionnetworks.Ithasbeensuccessfullyappliedtovarioustypesofnetworks,includingradial,looped,andmeshedstructures,andithasbeenshowntoberobustandreliableevenundervaryingloadandgenerationconditions.Themethodhasalsobeenintegratedintosoftwaretoolsfordistributionsystemplanningandoperation,providingapracticalsolutionforoptimizingnetworkperformance.

Inconclusion,theeliminated-buscompensationmethodisapowerfultechniqueforflowanalysisinmulti-sourcedistributionnetworks.Itovercomesmanyofthelimitations