【正文】 graph, and if the interval between stations market (vertical), the station goods yard line, handling lines, of the pipeline, market and the market within the hub between, etc. (horizontal).With a call for the four crossanchors subparagraph structure of joints, or using sub insulation devices + 3 crossanchors of key structures.Hours of electricity sub structure for early crosseight (two four crossreducing) anchors of the jointsand later to three hours of crossanchors of insulation devices + joints replaced. In recent years, following a steady improvement in the speed of the train, anchors of joints because of their flexible structure of hours of good, hard little affected by the smooth transition of power bow advantage in acceleration zone and the gradual introduction of highspeed sector also. It must be noted that motorcycle through hours of 石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)33electricity insulation, the power through the adoption of the devices break apart before, slide through and then closed the circuit breakers continue to operate, otherwise they will be evoked strong electric arc, resulting in alternate with short circuit, and even destroy contact work.(四) The Electricity Network ApproachMy electrified railway adopt unilateral power means that the traction substations to the power supply work, then each of the next stop electricity only from one work to the access of electric traction substations (from the two sides agreed bilateral energy and electricity, will enhance the contact work using work pressure, but because of its failure wide, protective devices plex reasons that have not yet adopted). Of line segments district booths will be available through links on the contact work, the realization of parallel connection of electricity, it may be appropriate to raise the pressure pipe works. When traction substations failure, through zoning Pavilion adjacent substations to achieve the power zone, when electricity expanded work pressure lowering usually be reduced to a few or drive train will be few, in order to maintain operations.Direct Way ElectricityAs stated earlier, the introduction of electrified railway workers frequency the public frequency of singlephase munication electric traction system, and singlephase current load in the contact work to change electromagic fields generated around the space, thereby to nearby devices and radio munication facilities have certain electromagic interference. My early electrified railway (such as Po into Line, the Shenyang Line) building, in the mountains, the local munications technology developed, the railway munication using high performance coaxial cable shield, then the effect is minimal electromagic interference, not to take special protective measures, this unilateral approach also known as the electricity supply direct way (short for TR electricity manner). With the electrification of the railway to the plains and cities, the growing contradictions prominent electromagic interference, so in a different way to the electricity work protection measures will produce different power supply. There are socalled BT, at and DN electricity. As can be seen from the introduction of these methods have a mon power supply features in the contact work backbone adjacent fields with the same high office to contact flags have a wire attached. Electric traction, additional wire, and then passes through the electric current through the drive current, theory (or 石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)34ideals) of equal size, the opposite direction to both produce electromagic interference mutual offset. But in fact do, so different methods have different protective effects of electricity.Flow Transformer (BT) Forms of ElectricityThis power, in contact with every online a distance with a Taiwan smoking transformer flow (change pared to 1:1), the original margin string to the contact work, the margin string to return line (as NF line aircraft in the contact work backbone adjacent fields, and contacts flying high), each two smoking transformer flow between a smoking on line, will return line with rail connections, Its role is to return the suspended use to, the back line to drive substations, a tamperresistant effect. Because land back and the socalled half effect, BT electricity manner protective effect is not ideal, with the addition of passive to cause devices to plex work structure, the flow of motorcycles conditions deteriorated in recent years have rarely used.AT Power Supply Electricity use at manner, the main change being substations to 55kV output voltage via at (AT transformers and change than 2:1) to receive electricity supply work, one lead to Contact Network , another lead are feeder lines (as AF line, but also in the。 (3)Good insulation performance。通過這次畢業(yè)設(shè)計(jì)，我不僅把大學(xué)中所學(xué)過的專業(yè)課知識(shí)很好的運(yùn)用于實(shí)際，而且很大程度上拓寬了自己其它方面的知識(shí)，為今后的工作打下了堅(jiān)實(shí)的基礎(chǔ)。目前我國電力工業(yè)還會(huì)有很大發(fā)展，按照我國“九五” 規(guī)劃和 2022 年發(fā)展目標(biāo)的要求，將繼續(xù)維持較高的增長速度。本次設(shè)計(jì)是 110kV 牽引變電所的設(shè)計(jì)，牽引變電所將三相 110kV 高壓轉(zhuǎn)變成 的單相電。 牽引變壓器的選擇牽引變壓器的安裝容量，是在計(jì)算容量與校核容量的基礎(chǔ)上，再考慮備用方式，最后按其系列產(chǎn)品確定的牽引變壓器臺(tái)數(shù)與容量。④原邊仍為 YN 接線，中性點(diǎn)引出，與高壓中性點(diǎn)接地電力系統(tǒng)匹配方便。內(nèi)三角形接線的一角 c 與軌道、接地網(wǎng)連?a?b接。這種接線型式把對(duì)稱三相電壓變換成對(duì)稱二相電壓，用其一相供應(yīng)一邊供電臂，另一相供應(yīng)另一邊供電臂。dd由上式可知， 為定值時(shí)，溫度系數(shù) 與兩供電臂負(fù)荷電流大小的比值 有關(guān)。于是，e eeIUS3?牽引變壓器的容量利用率 (63) .??eecIUS?即三相 YN，d11 結(jié)線牽引變壓器承擔(dān)單相牽引負(fù)荷時(shí)，其輸出容量只能達(dá)到其額定容量的 %。單相結(jié)線牽引變壓器負(fù)荷，在電力系統(tǒng)中引起的不對(duì)稱度最嚴(yán)重，達(dá)到 100%。t校核容量 為： =38180/=25454(KVA) (512)Smax?石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)19第 6 章 牽引變壓器的選擇牽引變壓器是牽引變電所內(nèi)的核心設(shè)備，擔(dān)負(fù)著將電力系統(tǒng)供給的 110kV 或220kV 的三相電源變換成適合電力機(jī)車使用的 的單相電的作用。石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)17校核容量的計(jì)算條件，是按其最大容量的需要來確定的。牽引變壓器的容量應(yīng)能滿足負(fù)荷的需要。?paI253?pbI 供電臂的有效電流的計(jì)算 供電臂 A、B 的有效電流，通常用 計(jì)算，現(xiàn)用實(shí)用簡下上下上 pxx III22?化公式計(jì)算，即： pxIK39。與電力系統(tǒng)的負(fù)荷相比，牽引負(fù)荷的位置是移動(dòng)的，其大小隨線路坡度、列車密度等因素而發(fā)生很大的變化，且牽引負(fù)荷在供電分區(qū)任意分布，接觸網(wǎng)電流為非正弦波。這種供電方式的接觸網(wǎng)結(jié)構(gòu)簡單可靠，工程投資、運(yùn)營成本和維修工作量都少，近年來得到廣泛應(yīng)用。本次設(shè)計(jì)采用的是單邊同相一邊分開供電，它的開關(guān)設(shè)備、繼電保護(hù)和倒閘操作都比較簡單。而所用變壓器( 又稱自用電變壓器)是給本所的二次設(shè)備、檢修設(shè)備以及日常生活、照明負(fù)荷供電的設(shè)備，電壓一般為 ，容量從幾十至幾百KVA 不等，