變電站設(shè)計(jì)外文翻譯--變電站建設(shè)的一般要求-其他專業(yè)-全文預(yù)覽
【正文】 ay be outdoor or indoor. The feed and output lines at 610kV substations are mainly of the cable type .at 35220kV substations of the aerial type .When erecting and wiring the substations ,major attention is given to reliable and economic power supply of a given production. Substations are erected by industrial methods with the use of large blocks and assemblies prepared at the site shops of electric engineering anizations and factories of electrical engineering industry .Substations are usually designed for operation without continuous attendance of the duty personnel but with the use of elementary automatic and signaling devices. When constructing the structural part of a substation .it is advisable to use lightweight industrial structures and elements (panels ,floors ,etc.) made of bent sections .These elements are premade outside the erection zone and are only assembled at site .This considerably cuts the terms and cost of construction. Basic circuitry concepts of substations are chosen when designing a powersupply system of the enterprise .Substations feature primary voltage entrances .transformers and output cable lines or current conductors of secondary voltage .Substations are mounted from equipment and elements described below .The number of possible binations of equipment and elements is very great .Whenelaborating a substation circuitry ,it is necessary to strive for maximum simplification and minimizing the number of switching devices .Such substations are more reliable and economic .Circuitry is simplified by using automatic reclosure or automatic change over to reserve facility which allows rapid and faultless redundancy of individual elements and using equipment. When designing transformer substations of industrial enterprises for all voltages , the following basic considerations are taken into account: 1. Preferable employment of a singlebus system with using twobus systems only to ensure a reliable and economic power supply。他們接收 ,轉(zhuǎn) 換和發(fā)送電能。 中央分配變電站站不同于主配電變電它是一個(gè)更強(qiáng)大的電力設(shè)施 ,它的電壓大部分在110220kV的電壓。轉(zhuǎn)換器變電站的能量轉(zhuǎn)換是用半導(dǎo)體整流器來變頻的。 根據(jù)變電站變的位置，電站設(shè)備在可以露天或室內(nèi)。變電站 通常是專為不連續(xù)操作的責(zé)任人員所設(shè)計(jì) ,但用的是基本的自動設(shè)備和信號裝置。 變電站基本電路概念設(shè)計(jì)的選擇 ,是根據(jù)企業(yè)的供電系統(tǒng)特點(diǎn)得到的。電路簡化是采用自動接入或自動轉(zhuǎn)入儲備的方法 ,允許快速和無錯(cuò)誤的自動接入每一個(gè)元件和使用設(shè)備。 。 變電站的線路的意義 ,最重要的一點(diǎn)是要妥善安排與選擇轉(zhuǎn)換器件 (開關(guān)、隔離者、電流限制器等、避雷器、高低壓熔斷器 ),這決定了變電站的目的、功能和意義。他們之中的許多人覺 得電是有某種極小的微粒構(gòu)成的，但試圖把電分離成單個(gè)的小顆粒他們卻束手無策。 7 這些電粒子，他們對我們并不陌生，因?yàn)槲覀冎浪麄兙褪请娮印Ｄ承┰拥慕Y(jié)構(gòu)使他們很容易失去電子。第三層軌道上擠滿 18 個(gè)電子。 結(jié)果，在銅導(dǎo)線中自由電子在銅原子之間向四面八方漂浮。一種就是化學(xué)方法。 磁鐵 幾乎每個(gè)人都見過馬蹄形磁鐵 之所以這樣叫他是因?yàn)樗麄兊男螤钭龀神R蹄形的。他有一根牧羊人用的帶鐵頭的棍杖。 近年來 ，人們已經(jīng)掌握怎樣使用鐵來制成磁鐵。如果用一根棒做的話，就更容易看出這些鐵粉排成的線條了。 但是，在電子周圍似乎也有磁力線。磁性就是由電子的運(yùn)動引起的。 。然而，在磁鐵中，原子都排列的使它們的電子都向同一方向旋轉(zhuǎn)。由于運(yùn)動的電子的磁性的結(jié)果，鐵粉就會繞導(dǎo)線周圍形成一些圓環(huán)。他們解釋說。 在我們討論這點(diǎn)之
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