ZPW-2000A軌道電路天津鐵道職業(yè)技術(shù)學(xué)院鐵路信號(hào)基礎(chǔ)設(shè)備維護(hù)課程ZPW-2000AtrackcircuitTianjinRailwayvocationalandtechnicalcollegeMaintenanceofbasicrailwaysignalequipment補(bǔ)償電容1.為什么需要補(bǔ)償電容2.補(bǔ)償電容的容量3.補(bǔ)償電容的設(shè)置Compensatedcapacitor1.Why2.

Capacity3.settingZPW-2000A無(wú)絕緣軌道電路的載頻較高，信息在傳輸過(guò)程中，衰耗很大，這樣一來(lái)，如何保證軌道電路的傳輸距離，使信息被可靠接收呢？ThecarrierfrequencyoftheZPW-2000Ajointlessrailcircuitishigh,andtheinformationisattenuatedgreatlyduringtransmission.Inthisway,howcanthetransmissiondistanceoftherailcircuitbeguaranteedsothattheinformationisreceivedreliably?UM71無(wú)絕緣軌道電路補(bǔ)償電容的安裝

根據(jù)1.5

Ω·km的道床電阻，不區(qū)分載頻頻率，采取分段方式，每100米加裝一個(gè)33μF電容，

對(duì)保證軌道電路傳輸距離起到一定的效果。

但是我國(guó)目前的道岔電阻已經(jīng)改為1.0Ω·km，不再適合沿用這種方法了。

那么這種情況下該如何加裝呢？加裝的補(bǔ)償電容容量多大為合適呢？Installationofcompensated

capacitanceinUM71trackcircuitAccordingto1.5

Ω·kmballastresistance，nomatterwhatthecarrierfrequencyis,a33μFcapacitorwasinstalledevery100m,whichhasacertaineffectonensuringthetransmissiondistanceofthetrackcircuit.

thecurrentballastresistanceinChinahasbeenturnedto1.0Ω·km,whichisnolongersuitableforthismethod.Sohowtoadditinthiscase?Howgoodisthecompensationcapacitorcapacityadded?補(bǔ)償電容的安裝采取分段方式，以抵消鋼軌電感所帶來(lái)的影響。以100米為例。Thecompensationcapacitorsareinstalledinsectionstooffsettheeffectcausedbytheinductanceoftherails.Take100metersasanexample.Capacityofcompensationcapacitor補(bǔ)償電容容量補(bǔ)償長(zhǎng)度“L補(bǔ)補(bǔ)償長(zhǎng)度L補(bǔ)=？補(bǔ)償長(zhǎng)度“L補(bǔ)LC=？Lc

isthedistancebetweenthetuningunitsatbothendsofjointless

trackcircuit,bothendsareelectricalinsulated

joints,Lc=L-29m,ifoneendismechanicalinsulated

joint,oneendiselectricalinsulated

joint,Lc=L-14.5m.載頻頻率1700Hz序號(hào)道床電阻

Ω?KM電容容量μF軌道電路長(zhǎng)度m補(bǔ)償電容步長(zhǎng)m補(bǔ)償電容

個(gè)數(shù)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現(xiàn)在有一段軌道電路，載頻是1700Hz,道床電阻是1.0Ω?km，軌道電路長(zhǎng)度為1230m,那么補(bǔ)償電容該如何設(shè)置與安裝呢？思考題

小結(jié)作用容量設(shè)置方法Nowthereisatrackcircuit,thecarrierfrequencyis1700Hz,ballastresistanceis1.0Ω?km,trackcircuitlengthis1230m,sohowthecompensated