外文翻譯---復(fù)合絕緣子

1、<p><b>　　外文資料翻譯</b></p><p>　　Composite insulator</p><p>　　With the economic and social development of electric power, the safety and reliability of the operation put forward hig

2、her request. Data shows that: high voltage grid operation fault is mostly due to poor insulation, and high-voltage lines insulator is the weak link of high-voltage grid insulation. Therefore the operation condition of in

3、sulator were charged detection, to ensure safe and stable operation of the grid has important realistic significance.</p><p>　　Composite insulator to light weight, high mechanical strength, good pollution re

4、sistant, easy operation and maintenance etc in countries in the power system has been widely applied. But with the use of composite insulators lines of composite insulators, had appeared in the operation of all kinds of

5、questions. These problems have caused all scholars and power system of personnel. Therefore, the study of composite insulators insulation fault detection technology, reliable operation of the power is</p><p>

6、;　　At present, the detection of composite insulators in charged of technology research is very active, mainly by detecting technology: observation and ultraviolet imaging method, the method of infrared measuring temperat

7、ure and electric waves, etc. General: infrared measuring temperature and electric method is satisfactory in two ways.</p><p>　　The composite insulator electric decomposing along the longitudinal component an

8、d insulator along the radial direction, insulator radial electric components, the proportion of small negligible. Longitudinal electric component is about equal to the composite insulator electric field, in the longitudi

9、nal electric component can test the defects of composite insulators. No defect composite insulator electric intensity vertical component E along the axial insulator curve. The composite insulator fiel</p><p>

10、;　　When the insulator intermittent existence defects (including sheath inf inconnective defects and mandrel, due to the defect of inconnective inf electric field intensity E is the length of the potential, thus this vert

11、ical variation, electric field intensity will suddenly the electric field distribution curve, but also no longer smooth in the corresponding position have aberration (middle), sink, ends, therefore, is measured by the lo

12、ngitudinal field distribution of composite insulators, can find</p><p>　　Composite post insulator to effectively use the narrow corridor, applicable to open pressure city network technology, can reduce tower

13、 height, can save lots of human, material and financial resources, due to its high bending strength, can prevent porcelain crossarm cascade, is the porcelain of product, Small volume, light weight, shock, impact resistan

14、t capability is strong, no artificial cleaning, to guarantee safe operation. This product adopts the overall design of the stick, compact structur</p><p>　　Composite post insulator have different roles in di

15、fferent types, structure height and creepage distance is different, composite insulator is mainly used in substation, the pillar with good hydrophobic, aging resistance, tracking and electrical erosion, high tensile stre

16、ngth and flexural strength, high mechanical strength, impact resistance, shockproof and brittle performance is good, light weight, easy installation and maintenance, the upper end of the installation dimensions and the c

17、orrespond</p><p><b>　　復(fù)合絕緣子</b></p><p>　　隨著社會經(jīng)濟的不斷發(fā)展，對電力運行的安全性和可靠性提出了更高的要求。資料表明:高壓電網(wǎng)運行故障多半是由于絕緣不良所引起的，而高壓線路絕緣子是高壓電網(wǎng)絕緣的薄弱環(huán)節(jié)。對其進行檢測，對于保證電網(wǎng)安全、穩(wěn)定運行具有重要的現(xiàn)實意義。 復(fù)合絕緣子以重量輕、機械強度高，耐污性能好、運行

18、維護方便等優(yōu)點在各國電力系統(tǒng)中得到了廣泛應(yīng)用。但隨著線路復(fù)合絕緣子的大量使用，復(fù)合絕緣子在運行中已經(jīng)出現(xiàn)了各種各樣的問題。這些問題已引起各國學(xué)者和電力系統(tǒng)工作人員的高度重視。因此，研究復(fù)合絕緣子絕緣缺陷檢測技術(shù)，是保證電力運行可靠性的一項重要工作，對于保證電網(wǎng)安全運行具有十分重要的意義。復(fù)合絕緣子的缺陷包括內(nèi)絕緣缺陷和外絕緣缺陷。內(nèi)絕緣缺陷在外觀上是難以發(fā)現(xiàn)的，同時它們又是最危險的缺陷,因此,復(fù)合絕緣子缺陷檢測的難點主要在于內(nèi)絕緣缺陷。

19、本文研究復(fù)合絕緣子內(nèi)絕緣缺陷的檢測方法。此法同時也適用于檢測復(fù)合絕緣子的外絕緣缺陷?！　∧壳埃瑖鴥?nèi)外針對帶電檢測復(fù)合絕緣子技術(shù)的研究十分活躍，主要采用的檢測技術(shù)有：觀察法、紫外成像法、紅外測溫法、聲波法和電場法等。一般認(rèn)為:紅外測溫法和電場法是效果較好的兩種方法。</p><p>　　復(fù)合絕緣子的電場可分解成沿絕緣子的縱向分量和沿絕緣子的徑向分量，徑向電場分量所占的比例很小，可忽略不計?？v向電場分量約等于復(fù)合絕

20、緣子的電場,在現(xiàn)場可用縱向電場分量檢測復(fù)合絕緣子的缺陷。無缺陷復(fù)合絕緣子電場強度縱向分量E沿絕緣子軸向的變化曲線。復(fù)合絕緣子沿面場強分布很不均勻，高壓電極附近電位線密集，為高場強區(qū)，中間部分電場分布較均勻，低壓電極附近電場有所回升。顯"U"字形。復(fù)合絕緣子沿面電位分布很不均勻。　　當(dāng)絕緣子存在導(dǎo)通性缺陷時(包括護套中導(dǎo)通性缺陷和芯棒中導(dǎo)通性缺陷)，由于電場強度E是電位沿長度的變化率，因此此處的縱向電場強度將突然降低

21、，做出的電場分布曲線也不再光滑，而是在相應(yīng)的位置上有畸變(中間下陷，兩端上升)，由此可見，通過測量復(fù)合絕緣子的縱向電場分布，可以找出復(fù)合絕緣子的內(nèi)絕緣導(dǎo)通性故障。當(dāng)絕緣子存在空氣隙時(包括護套中空氣隙缺和芯棒中空氣隙)，在外部電場的極化下，氣隙中的局部場強隨氣隙形狀的不同而有不同倍數(shù)的升高，氣隙中有可能發(fā)生電離。因此此處的縱向電場強度將突然增大，做出的電場分布曲線也不再光滑，而是在相應(yīng)的位置上有畸變，本文缺陷人為設(shè)定為護套中三角狀空氣隙

22、缺陷，缺陷狀</p><p>　　復(fù)合支柱絕緣子能有效地利用狹窄的走廊開壓送電，適用于城網(wǎng)技術(shù)改造，能降低桿塔高度，可節(jié)約大量的人力、物力和財力，由于其彎曲強度高，可防止瓷橫擔(dān)容易出現(xiàn)的級連斷裂事故，是瓷橫擔(dān)所無法替代的產(chǎn)品；體積小，重量輕，防震、抗沖擊能力強、不需人工清掃，為安全運行提供保障。采用整體棒型設(shè)計，結(jié)構(gòu)緊湊，質(zhì)量高、重量是同等級瓷和玻璃絕緣子的1/10，運輸安裝極為方便。適用于污穢地區(qū)，高機械拉伸負(fù)

23、荷，大跨距和緊湊型線路。污閃電壓比同等級瓷和玻璃絕緣子提高30％-50％。在-60度--+200度環(huán)境溫度下性能穩(wěn)定；采用的不可擊穿型設(shè)計，運行中無需測零值。電氣性能優(yōu)越，機械強度高，內(nèi)部承載的環(huán)氧玻璃引拔棒抗張抗彎強度比普通鋼材高2倍，是高強度瓷材料的8~10倍，有效提高了安全運行的可靠性。耐污性能好，抗污性能好，抗污閃強力強，其濕耐受電壓和污穢耐受電壓為相同爬距瓷絕緣子的2~2.5倍。且不需清掃，能在重污穢的去安全運行。體積小、重量