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《長(zhǎng)江鎮(zhèn)江段大跨越輸電線路微風(fēng)振動(dòng)在線監(jiān)測(cè)系統(tǒng)分析》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、華北電力大學(xué)碩士學(xué)位論文摘要微風(fēng)振動(dòng)引起導(dǎo)線的疲勞斷股是輸電線路安全運(yùn)行的一大威脅。高壓架空線路導(dǎo)線微風(fēng)振動(dòng)是由于風(fēng)的激勵(lì)作用而引起的一種高頻率、小振幅的導(dǎo)線運(yùn)動(dòng),在高壓架空線路上普遍存在。尤其在大跨越,因檔距大、懸掛點(diǎn)高和水域開(kāi)闊,風(fēng)向風(fēng)速,溫度等微氣象條件的影響,使風(fēng)輸給導(dǎo)線的振動(dòng)能量大大增加,導(dǎo)線振動(dòng)強(qiáng)度遠(yuǎn)較普通檔距嚴(yán)重。微風(fēng)振動(dòng)引起導(dǎo)、地線疲勞斷股等事故是通過(guò)累積效應(yīng)的方式發(fā)生的,有一個(gè)累積時(shí)間和過(guò)程。國(guó)內(nèi)大量的證據(jù)表明:微風(fēng)振動(dòng)嚴(yán)重威脅著架空輸電線路特別是大跨越的安全運(yùn)行。大跨越在輸電線路運(yùn)行中
2、具有特殊重要地位,一旦發(fā)生某些線路部件的疲勞損壞,如導(dǎo)地線、OPGw的疲勞斷股,金具、間隔棒及桿塔構(gòu)件的疲勞損壞或磨損等,會(huì)嚴(yán)重威脅著輸電線路的安全運(yùn)行,給國(guó)民經(jīng)濟(jì)造成重大損失。因此,大跨越的防振和監(jiān)測(cè)工作一直為線路工作者所關(guān)注,為設(shè)計(jì)、運(yùn)行及科研部門(mén)所重視。文中討論了輸電線路微風(fēng)振動(dòng)的機(jī)理,介紹了一種通過(guò)監(jiān)測(cè)儀和信息技術(shù)實(shí)現(xiàn)的對(duì)大跨越導(dǎo)、地線進(jìn)行遠(yuǎn)程監(jiān)視的在線測(cè)量系統(tǒng),并對(duì)測(cè)量數(shù)據(jù)進(jìn)行分析,以便為線路的運(yùn)行和維護(hù)工作提供幫助。關(guān)鍵詞:輸電線路;大跨越;微風(fēng)振動(dòng);在線測(cè)量系統(tǒng)華北電力大學(xué)碩士學(xué)位論文!!!
3、曼!!曼!!!!!!曼曼!曼曼曼!!!曼曼!!曼!曼曼!!曼!曼曼曼!曼!曼!!曼!!皇!曼!!!曼!!!!!鯉墅!曼!曼曼曼!!!曼曼!!曼曼!曼曼!!!曼曼!!曼!!曼ABSTRACTOfae01ianvibrationf.a(chǎn)tiguecausedbythewireofrsh砒‘(:sisamajor皿eattothesafeoperationofthetransmission1ine.ThebreezevibrationcIfhi曲-voltageoVerhead1inec()nductorsisd
4、uetotheincentiVeeffectofthewindcausIedbyahigh行equency’smaUalnplitudeofthewiremoVement,preValentinthehi曲一voltageoVerheadlines.Leap,e∞eciallyin1argeduetomespan,suspensionandsomeopenwaters,meimpactofmicro-meteor010西calconditionsofwinddirectionandwind印eed,tem
5、perature,etc.,目eatlymcreasedthevibrationalene唱yofmewind10stwire,wireVibrationstren垂ht11anordina巧files舶mtheserious.BreezeVibrationcausedbymeconduc:tivity’蓼oundfatigueaccidento:茁shares,throu曲thecumulatiVeefrectofacumulatiVeproc:essandtime.Thelargeamounto:fe
6、Videncethat:ae01ianVibrationofaserioust11reatto讓【eoverheadtransmissionlines.e{;peciallythebig1eapsafeoperation.Big1eapintheoperaticlllofthetransmission1inehasas1)ecialandimpoIrtajltpositionintheeVentofthefati舒led鋤ageofcertaincircuitcI)mponents,suchasGroun
7、dedmeOPGWfatigueofrsha】?es,fittings,spacersandtowercI)mponentsf.a(chǎn)tiguedamageorwearwillbeaseriousthreattothesafeoperationofmetransmission1ine,causingm勾or10ssestothenationalecon('my.Therefore,thespanofthea】1ti—Vibrationandmonitoringhasbeenofconcemforthe]【in
8、eworkers,importantforthedesi印,operationaIldscientificresearchdepartments.DiscussedinaeolianVibrationofthemechanismof七ransmission1ines.meonlinemeasurementsystemspanguide,伊oundmonitorandITremotemonitoring,andmeasureme