【正文】 line of contact and pensation devices, chainshaped flags. Compensation devices is the role of temperature change in the environment, so that the line of contact, the demand for power to maintain constant tension. Loadbearing demand and contact line anchors way of pensation devices are used throughout the pensation is only half the line of contact that a pensation. Pillar department hanging string simple string hanging string or flexible working for the simple chainchainflags flying or flexibility.My Link electrified railway line is currently mostly used simple chainwide pensation hoisted station lines are much more simple chainhalf pensation flags. Only the flags that line of contact simple flags, pensation methods generally used only in the maintenance of the line, factories and mines only lanes and a few occasions used.Contact flags along the way up, in order to meet the mechanical power requirements into a single anchor, the anchor of the anchors of mutual transitional structures called anchors of the joints, usually with insulation (four cross) anchors of the joints and noninsulation (3 across) anchors of the joints of hours, the former also known as electricity sub anchors of the joints, which is machinery sub anchors of the joints. Anchors, and electrical connections between the anchors of electricity connected lines (3 across) or isolation switches (four cross) pleted.Support DevicesSupport devices to support access to the hoisting and load pillars or other buildings, its structure with lines circumstances change. Interval mainly wrist arm structure。 石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)31(5)Next lightweight simple work structure should seek to ensure standardization to facilitate the construction and operation of maintenance。 (3)Good insulation performance。 The contact work built along the railway work over the bridge, and the power of lootives or bow can be obtained the energy from it to drive the train. Traction substations location of the contact work has hours of insulation, and between the two neighboring traction substations has district booths, corresponding to a subwork of the insulation. The contact work between traction substations and district booths (including feedback wires) that electricity arm.Traction power supply circuit is the lead substations feedback wires – Contact work electricity motorcycles suspended returning connectivity (traction substations) grounded work of closed circuit position, which flow currents that 石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)30drive currents, closed or break apart traction power supply circuit will produce strong electric arc, and improper handling can cause serious consequences. Usually, we often called the contact work, rail circuit (including land), and feedback back line is drive wiring work.Traction power equipment overhaul is charged of the electricity for the operation, traction power supply system operational control is charged of the activation. Electricity controlling usually located in the part of Railway Bureau and dispatch of the Railway Bureau.The Traction SubstationsTraction substations task is to reduce the voltage threephase power systems, and fed out the electricity in a single way. Declined the voltage is transformed by force, and changed a threephase electrical wiring to a singlephase through the substation. Traction transformers is a special voltage power transformers, it should meet requirements load changes dramatically, external short circuit frequent, and is the heart of traction substations. My guide used threephase transformers, threephase two of the three types of singlephase, hence traction substations are divided into threephase, threephase – twophase and singlephase three categories. With the level of technology rises, the electrification of the railway lines have been promoting the use of centralized monitoring and control system to move far, traction substations will gradually achieve unattended, electricity directly from the remote control operation.Contact NetworkNext along the railway work was installed by the special power lines, electric power lootives bow out through contacts with sliding friction flow, access electricity. Therefore both should be good working condition. Bow affected by the movement of electricity is very plex and there are many factors. To ensure their good supply, the contact work structure itself should be :(1)The contact line from the high rail should be equal coverage, and crosspoint positioning with the relative position in the center of bow。在此，對(duì)他們的合作和幫助表示感謝！付出總會(huì)有回報(bào)，這幾個(gè)月的認(rèn)真設(shè)計(jì)，再加上崔老師的精心輔導(dǎo)，我們邁過了艱難的每一步，按時(shí)地完成了畢業(yè)設(shè)計(jì)，基本達(dá)到了預(yù)期的目標(biāo)。這次畢業(yè)設(shè)計(jì)的成功，崔老師付出了太多的汗水和艱辛。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)。用它描述未來電網(wǎng)的特征似更恰當(dāng)。隨著我國(guó)電力技術(shù)的發(fā)展，牽引供電系統(tǒng)也不斷更新，如我國(guó)磁懸浮鐵路的修建就是一個(gè)很好的例子。鐵路牽引供電只是我國(guó)電力工業(yè)中的一小部分，現(xiàn)代化鐵路以高速、快捷作為最終的目標(biāo)。目前我國(guó)電力工業(yè)還會(huì)有很大發(fā)展，按照我國(guó)“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(zhǎng)速度。 展望現(xiàn)代電網(wǎng)的設(shè)計(jì)運(yùn)行技術(shù)近年取得了長(zhǎng)足發(fā)展，但隨著生活現(xiàn)代化的進(jìn)程，對(duì)電力供應(yīng)的可靠性要求也日益提高。(3)通過負(fù)荷計(jì)算對(duì)牽引變壓器進(jìn)行了合適的選型，牽引變壓器采用 SFS731500/110 型號(hào)。設(shè)計(jì)的基本情況如下：(1)牽引變電所的主接線，在 110kV 側(cè)，采用了帶外跨條的內(nèi)橋式接線，該種接線方式具有結(jié)構(gòu)簡(jiǎn)單、運(yùn)行可靠等優(yōu)點(diǎn)； 側(cè)，采用了單母線分段接線方式，這種接線方式不僅有單母線接線方式本身的簡(jiǎn)單、經(jīng)濟(jì)、方便等基本優(yōu)點(diǎn)，又在一定程度上提高了供電的可靠性。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。石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)24石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)25第 7 章 結(jié)論與展望 結(jié)論電力牽引供電系統(tǒng)中，牽引變電所是一個(gè)不可或缺的重要組成部分。?由變壓器允許過負(fù)荷 50%可得，固定全備用方式下，=31500 =47250KVAmaxbS?與由計(jì)算得到的 =38180KVA 相比略大一些，故所選安裝容量是合適的。牽引變壓器的系列產(chǎn)品，額定容量?jī)?yōu)先數(shù)為 R10 系列，有10000，12500，16000，20220，25000，31500，40000，50000，63000，80000，100000(KVA)等。 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。采用 YN， 結(jié)線平衡變壓器的牽引變電所，是對(duì) YN， 結(jié)線阻抗匹配平衡變壓器的改造，在此不對(duì)其具體介紹。其缺點(diǎn)是：設(shè)計(jì)計(jì)算及制造工藝復(fù)雜，造價(jià)較高。⑥利用逆斯科特接線變壓器把對(duì)稱兩石家莊鐵道學(xué)院畢業(yè)設(shè)計(jì)23相電壓變換成對(duì)稱三相電壓，可供應(yīng)牽引變電所自用電和站區(qū)三相電力。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。②當(dāng)副邊 、 時(shí)，原邊三相電??I?cos流對(duì)稱，沒有負(fù)序電流對(duì)電力系統(tǒng)的影響。采用 YN， 結(jié)線阻抗匹配平衡變壓器的牽引變電所中，裝設(shè)兩臺(tái) YN， 結(jié)線阻抗匹配平衡變壓器，可以兩臺(tái)并聯(lián)運(yùn)行；也可以一臺(tái)運(yùn)行，另一臺(tái)固定備用。由兩相牽引母線分別向兩側(cè)對(duì)應(yīng)的供??