综合研究蒲斌等：供电改造提升大功率变频器低电压穿越能力的措施油气田地面工程https://yqtd.cbpt.cnki.net供电改造提升大功率变频器低电压穿越能力的措施蒲斌杨福超韩小虎李扬国家管网集团西部管道公司摘要：目前国内天然气需求逐年增长，输气管道常年高压力运行，变频器低电压穿越能力不断提升使电驱压缩机在电网波动时连续运行的能力增强，但是供电线路故障引起压气站供电系统短时失电导致的停机停输可能造成管线运行超压。从维持变频器直流母线电压的时间需求出发，通过线路分列运行、调整线路重合闸、快速切换装置等方式提升供电可靠性；根据励磁变频器在电源切换过程中直流母线电压的变化趋势，使用静态转换开关、增加变频器直流电源的方式提升励磁变频器的供电可靠性。长输管道电驱压气站高压、低压供电系统改造方案对于压气站供电系统设计及电气系统运行提升具有借鉴意义。关键词：变频器；低电压穿越；直流母线；快切装置；直流电源MeasurestoImprovetheLowVoltageRideThroughCapabilityofHighPowerInverterbyPowerSupplyTransformationPUBin，YANGFuchao，HANXiaohu，LIYangWestPipelineCompany，PipeChinaAbstract：Atpresent，thedomesticdemandfornaturalgasisincreasingyearbyyear.Thegastrans-missionpipelineoperatesunderhighpressureallyearround，andthelowvoltageridethroughcapabilityofinvertershasbeencontinuouslyimproved，whichenhancesthecontinuousoperationabilityoftheelectric-drivencompressorincaseofvoltagedrops.However，thepowersupplylinefailuremaycauseashort-termpoweroutageinthecompressorstationpowersupplysystem，resultinginshutdown，whichmaycausepipelineoperationoverpressure.StartingfromthetimedemandtomaintaintheDCbusvoltageoftheinverter，itisproposedtoimprovethereliabilityofthepowersupplybymeansofseparateoperationoftheline，adjustmentofthelinereclosingmethod，andtheuseofahigh-speedtransferdevice.AccordingtothechangingtrendoftheDCbusvoltageoftheexcitationinverterduringthepowerswitchingprocess，themethodofusingastatictransferswitchandaddingtheinverter'sDCpowersupplyisproposedtoimprovethepowersupplyreliabilityoftheexcitationinverter.Themea-suresforthetransformationofthehigh-voltageandlow-voltagepowersupplysystemoftheelectric-drivencompress...
