电力系统及其自动化学报ProceedingsoftheCSU-EPSA第35卷第2期2023年2月Vol.35No.2Feb.2023“双高”配电网下变电站并联电容器灵活投切李建文，杨瑞卿，李戎，马小棠（华北电力大学电气与电子工程学院，保定071003）摘要：针对目前变电站并联电容器组投切方案存在的设备利用率低和易受双高配电网宽频谐波影响而损坏的问题，提出一种考虑谐波宽频特性的并联电容器组灵活投切策略。首先，建立10kV配电网并联补偿模型和电容器组投切方案集合。然后，运用模态分析法确定投切方案网络谐振点。最后，从并联补偿方案的谐波谐振机理出发，设计程序计算谐波电流放大倍数，确定并联补偿方案基本可行域，筛选出最优投切组合。算例仿真表明，该投切策略能在实现原有无功补偿的功能上，提高设备总体利用率，避免并联电容器组投入后产生的谐波谐振和谐波电流放大。关键词：配电网；并联电容器；模态分析；电容器组投切；谐波抑制中图分类号：TM72文献标志码：A文章编号：1003-8930（2023）02-0132-08DOI：10.19635/j.cnki.csu-epsa.001037FlexibleSwitchingofShuntCapacitorsinHighlyRenewableandHighlyPowerElectronicsDistributionNetworkLIJianwen，YANGRuiqing，LIRong，MAXiaotang（SchoolofElectricalandElectronicEngineering，NorthChinaElectricPowerUniversity，Baoding071003，China）Abstract:Aimedattheproblemsoflowequipmentutilizationandsusceptibilitytodamagecausedbywide-frequencyharmonicsinahighlyrenewableandhighlypowerelectronicsdistributionnetworkintheexistingswitchingschemeforshuntcapacitorbanksinsubstations，aflexibleswitchingstrategyforshuntcapacitorbanksconsideringthewide-fre⁃quencycharacteristicsofharmonicsisproposed.First，aparallelcompensationmodelof10kVdistributionnetworkandasetofswitchingschemesforcapacitorbanksareestablished.Then，themodalanalysismethodisusedtodeterminethenetworkresonancepoint.Accordingtotheharmonicresonancemechanismoftheparallelcompensationscheme，aprogramisdesignedtocalculatethemagnificationofeachorderharmoniccurrent.Afterwards，thebasicfeasibleregionintheparallelcompensationschemeisdetermined，andtheoptimalswitchingschemeisselected.Finally，thesimula⁃tionresultsofanexampleshowthattheproposedswitchingstrategycanimproveoverallequipmen...
