ZPW2000A轨道电路铁路信号基础设备维护21课件

ZPW-2000A轨道电路天津铁道职业技术学院铁路信号基础设备维护课程ZPW-2000AtrackcircuitTianjinRailwayvocationalandtechnicalcollegeMaintenanceofbasicrailwaysignalequipment补偿电容1.为什么需要补偿电容2.补偿电容的容量3.补偿电容的设置Compensatedcapacitor1.Why2.

Capacity3.settingZPW-2000A无绝缘轨道电路的载频较高，信息在传输过程中，衰耗很大，这样一来，如何保证轨道电路的传输距离，使信息被可靠接收呢？ThecarrierfrequencyoftheZPW-2000Ajointlessrailcircuitishigh,andtheinformationisattenuatedgreatlyduringtransmission.Inthisway,howcanthetransmissiondistanceoftherailcircuitbeguaranteedsothattheinformationisreceivedreliably?UM71无绝缘轨道电路补偿电容的安装

根据1.5

Ω·km的道床电阻，不区分载频频率，采取分段方式，每100米加装一个33μF电容，

对保证轨道电路传输距离起到一定的效果。

但是我国目前的道岔电阻已经改为1.0Ω·km，不再适合沿用这种方法了。

那么这种情况下该如何加装呢？加装的补偿电容容量多大为合适呢？Installationofcompensated

capacitanceinUM71trackcircuitAccordingto1.5

Ω·kmballastresistance，nomatterwhatthecarrierfrequencyis,a33μFcapacitorwasinstalledevery100m,whichhasacertaineffectonensuringthetransmissiondistanceofthetrackcircuit.

thecurrentballastresistanceinChinahasbeenturnedto1.0Ω·km,whichisnolongersuitableforthismethod.Sohowtoadditinthiscase?Howgoodisthecompensationcapacitorcapacityadded?补偿电容的安装采取分段方式，以抵消钢轨电感所带来的影响。以100米为例。Thecompensationcapacitorsareinstalledinsectionstooffsettheeffectcausedbytheinductanceoftherails.Take100metersasanexample.Capacityofcompensationcapacitor补偿电容容量补偿长度“L补补偿长度L补=？补偿长度“L补LC=？Lc

isthedistancebetweenthetuningunitsatbothendsofjointless

trackcircuit,bothendsareelectricalinsulated

joints,Lc=L-29m,ifoneendismechanicalinsulated

joint,oneendiselectricalinsulated

joint,Lc=L-14.5m.载频频率1700Hz序号道床电阻

Ω•KM电容容量μF轨道电路长度m补偿电容步长m补偿电容

个数minmaxminmax10.255530035067.780.3420.285535140080.292.8430.35540145074.284.2540.45545150070.178.5650.65570175083.890.2860.65575180080.185.79Carrierfrequency1700HzNoBallastresistance

Ω•KMcapacityμFLengthmSetpm

numberofcapacitorsminmaxminmax10.255530035067.780.3420.285535140080.292.8430.35540145074.284.2540.45545150070.178.5650.65570175083.890.2860.65575180080.185.79现在有一段轨道电路，载频是1700Hz,道床电阻是1.0Ω•km，轨道电路长度为1230m,那么补偿电容该如何设置与安装呢？思考题

小结作用容量设置方法Nowthereisatrackcircuit,thecarrierfrequencyis1700Hz,ballastresistanceis1.0Ω•km,trackcircuitlengthis1230m,sohowthecompensated