基于LC谐振取电和零序电压测量系统设计

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1、第44卷第504期电测与仪表Vol.44No.5042007年第12期ElectricalMeasurement&InstrumentationDec.2007基于LC谐振取电及零序电压测量系统的设计王毓、，贺煜峰、，莫昌锋（广西大学，广西南宁530004）摘要：为解决智能一体化高压开关取电问题，文中提出了基于电容分压原理的LC谐振取电电源系统：一次侧采用高压电容和变压器一次绕组串联，二次侧采用变压器二次绕组并联分压电容，降低了低压电容的电压设计等级，同时基于该电源系统中性点通过构建零序电流回路实

2、现了零序电压测量，无需安装三相五柱式PT或植入零序电压传感器，降低了工程造价。最后针对线路故障过电压及雷电冲击，设计了基于能量池电压监测和电力电子开关控制的防护电路。实验数据表明该系统的取电能力可达到1瓦，零序电压测量精度为5%，具有较大的工程应用价值。关键词：LC谐振；高压开关；电压监测；零序电压；单相接地故障中图分类号：TM933文献标识码：B文章编号：1001-1390（20172018）00-0000-00DesignofpowersupplybasedonLCresonanceandze

3、rosequencevoltagemeasurementsystemWangYu,HeYufeng,MoChangfeng(GuangxiUniversity,Nanning530004,Guangxi,China.)Abstract：:Inordertosolvetheproblemofpowersupplyforintelligentintegratedhighvoltageswitchgear,themethodbasedonofLCresonancepowersupplysystembas

4、edoncapacitancevoltagedividerprincipleisproposedinthispaper,andthehardwaremodulehasbeendesigned:thesupplypowercircuitcontainshigh-voltagecapacitors,isolationtransformerwindinginseries,transformersecondarywindingparallelVoltagevoltagedividerandseriesma

5、tchinginductorstoachieveregulatedoutput.Aprotectioncircuitbasedonenergypoolvoltagemonitoringandpowerelectronicswitchcontrolisdesignedforover-voltageandlightningimpulseoflinefault.Theexperimentaldatademonstratetheeffectivenessofthecircuit.Finally,theze

6、ro-sequencevoltagemeasurementisrealizedbyconstructingtheneutralcurrentloop,withoutinstallingthree-phasefive-columnPTorzero-sequencevoltagesensor,andthecostofprojectisreduced,whichprovidesthetechnicalconditionforthesingle-phasegroundfaultdetectionofthe

7、intelligentswitch.Theexperimentaldatademonstratesthepowertakingofsystemcanreach1watt,andtheaccuracyofzerosequencevoltagemeasurementis5%,whichhasgreatvalueinengineeringapplication.Keywords：:LCresonance,Highhighvoltage switchgear,voltage-monitoring,zero

8、-sequencevoltage pressure,single-phasegroundingfault-1-第44卷第504期电测与仪表Vol.44No.5042007年第12期ElectricalMeasurement&InstrumentationDec.20070　引言随着一二次融合概念的不断引入和现代电子技术及计算机技术的发展，传统的功能单一的一次配电开关设备将逐渐被集成了在线监测、保护、测量、控制等功能的智能一体化开关所取代，但其电源系统的获取和可靠性问题尚未圆满解决。