【摘要】：高壓架空導(dǎo)線長期受風(fēng)振、雷擊、覆冰和閃絡(luò)等惡劣運(yùn)行條件影響,易發(fā)生斷股損傷現(xiàn)象,將導(dǎo)致局部線路異常溫升。由于導(dǎo)線蠕變退火、材質(zhì)劣化、線路弧垂計(jì)算和壽命預(yù)測等問題均與導(dǎo)線運(yùn)行溫度參數(shù)密切關(guān)聯(lián),構(gòu)建計(jì)及斷股損傷的高壓架空導(dǎo)線溫升模型,有助于評估導(dǎo)線斷股和自身發(fā)熱對導(dǎo)線運(yùn)行狀態(tài)的影響,并為上述問題的深入研究提供必要的理論基礎(chǔ),對高壓輸電線路狀態(tài)監(jiān)測及減災(zāi)防災(zāi)技術(shù)的發(fā)展具有重要意義。目前已有一些關(guān)于導(dǎo)線運(yùn)行溫度計(jì)算模型的研究,然而,現(xiàn)有模型主要針對無損導(dǎo)線建立,模型中參數(shù)較多且難以準(zhǔn)確獲取,計(jì)算時大多采用經(jīng)驗(yàn)公式,計(jì)算結(jié)果存在一定的誤差。此外,當(dāng)前的溫升模型均未能反映斷股對導(dǎo)線溫升特性的影響,導(dǎo)線的電參數(shù)和熱參數(shù)在斷股后都會發(fā)生不同程度的變化。為此,本文展開了相關(guān)研究。首先,本文以鋼芯鋁絞線LGJ-120/25和LGJ-240/30為研究對象,設(shè)計(jì)了高壓架空導(dǎo)線斷股實(shí)驗(yàn)平臺,在不同電流等級和溫度條件下對無損及斷股導(dǎo)線交流電阻進(jìn)行實(shí)測,并分析了導(dǎo)線交流電阻的非線性特性。為準(zhǔn)確計(jì)算斷股導(dǎo)線交流電阻值,建立了計(jì)及斷股損傷的導(dǎo)線交流電阻計(jì)算模型,并對模型精度進(jìn)行了驗(yàn)證。在此基礎(chǔ)上,本文基于熱電類比理論,提出了高壓架空導(dǎo)線斷股溫升模型。利用導(dǎo)線斷股實(shí)驗(yàn)平臺,在不同斷股數(shù)條件下,對LGJ-120/25導(dǎo)線和LGJ-240/30導(dǎo)線加載不同的電流等級進(jìn)行載流溫升實(shí)驗(yàn)。為克服所建模型參數(shù)難以確定的問題,對實(shí)驗(yàn)數(shù)據(jù)進(jìn)行參數(shù)辨識,并分析了不同斷股數(shù)條件下模型參數(shù)隨電流變化的規(guī)律。通過實(shí)驗(yàn)驗(yàn)證分析,本文的斷股溫升模型計(jì)算結(jié)果與實(shí)驗(yàn)值較吻合,誤差小,可準(zhǔn)確描述斷股導(dǎo)線溫升熱動態(tài)過程。
[Abstract]:High voltage overhead conductors are affected by bad operating conditions such as wind vibration, lightning strike, icing and flashover for a long time, which will lead to abnormal temperature rise of local lines. Due to the problems of creep annealing, material deterioration, line sag calculation and life prediction, which are closely related to the wire operating temperature parameters, a temperature rise model for high pressure overhead conductors with broken strands damage is constructed. It is helpful to evaluate the influence of wire strands breaking and self heating on the running state of conductors, and to provide the necessary theoretical basis for the further study of the above problems, which is of great significance to the development of HV transmission line condition monitoring and disaster mitigation and prevention technology. At present, there have been some researches on the calculation model of conductor operating temperature. However, the existing models are mainly aimed at the establishment of lossless conductors, and the parameters in the model are many and difficult to obtain accurately, and most of them are calculated by empirical formula. There is a certain error in the calculation results. In addition, the current temperature rise models fail to reflect the influence of broken strands on the temperature rise characteristics of conductors, and the electrical and thermal parameters of conductors will change in varying degrees after breaking the strands. For this reason, this article has carried out the related research. Firstly, taking the LGJ-120/25 and LGJ-240/30 of steel core aluminum strand as the research object, the experimental platform of high voltage overhead wire breaking is designed, and the AC resistance of nondestructive and broken wire is measured under different current levels and temperatures. The nonlinear characteristics of the conductor AC resistance are analyzed. In order to calculate the AC resistance of broken wire accurately, the model of AC resistance with broken strand damage is established, and the accuracy of the model is verified. Based on the theory of thermoelectric analogy, the model of temperature rise of high voltage overhead wire is presented in this paper. In this paper, the current temperature rise of LGJ-120/25 wire and LGJ-240/30 wire loaded with different current levels is studied by using the traverse breaking experiment platform under the condition of different number of broken strands. In order to overcome the problem that the parameters of the model are difficult to be determined, the parameters of the model are identified, and the variation of the model parameters with the current is analyzed under the condition of different broken shares. Through experimental verification and analysis, it is found that the calculated results of the model are in good agreement with the experimental values, and the error is small, which can accurately describe the thermal dynamic process of the broken wire.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM75

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 殷偉斌;500kV線路光纖復(fù)合架空地線斷股原因分析[J];華東電力;2005年09期

2 李青;梁軍;冀晉川;王曉杰;王晨寶;;光纖復(fù)合接地電纜斷股事故原因分析[J];華北電力技術(shù);2006年07期

3 劉衛(wèi)東;何義良;;耐張桿塔引流斷股原因分析[J];河北電力技術(shù);2006年05期

4 焦永升;張樹義;張旺;王惠麗;;架空線斷股情況分析及處理[J];內(nèi)蒙古電力技術(shù);2008年05期

5 吳明祥;包建強(qiáng);勞建明;殷偉斌;;浙江電網(wǎng)光纖復(fù)合架空地線斷股原因分析及優(yōu)化探討[J];電力設(shè)備;2008年03期

6 孫峰;傅葵軍;高紹龍;郁佩;胡俊;;輸電線斷股、損傷故障分析及對策[J];電力科技與環(huán)保;2012年03期

7 周風(fēng)余;李貽斌;李峰;王常順;;高壓輸電線巡檢機(jī)器人在線斷股檢測與診斷系統(tǒng)[J];電力系統(tǒng)自動化;2008年14期

8 楊煉;熊典;;基于圖像處理的在線監(jiān)測輸電線斷股垂落高度研究[J];電子設(shè)計(jì)工程;2013年17期

9 許東容;500kV惠汕乙線光纖復(fù)合架空地線雷擊斷股分析[J];廣東電力;2004年05期

10 胡毅;葉廷路;王力農(nóng);汪峰;劉凱;;光纖復(fù)合架空地線的雷擊斷股機(jī)理與防治措施[J];電網(wǎng)技術(shù);2006年16期

相關(guān)會議論文 前7條

1 張?zhí)K;郭祥書;莫海峰;;某500kV其他線路OPGW光纖復(fù)合架空地線斷股原因分析[A];2008年云南電力技術(shù)論壇論文集[C];2008年

2 楊迎春;;110kV線路斷股原因分析[A];2010年云南電力技術(shù)論壇論文集（文摘部分）[C];2010年

3 張錦云;吳增明;;110kV下新線引流線斷股分析與處理[A];2012年云南電力技術(shù)論壇論文集（文摘部分）[C];2012年

4 葛忠續(xù);;高壓電動機(jī)繞組斷股分析與實(shí)例[A];全國火電100-200MW級機(jī)組技術(shù)協(xié)作會2008年年會論文集（下冊）[C];2008年

5 徐盛;李華鵬;;輸電線路導(dǎo)線覆冰斷股原因的分析[A];2008年抗冰保電技術(shù)論壇論文集（二）[C];2008年

6 徐盛;李華鵬;;輸電線路導(dǎo)線覆冰斷股原因的分析[A];2008年抗冰保電優(yōu)秀論文集[C];2008年

7 許東容;;500kV惠汕乙線光纖復(fù)合架空地線雷擊斷股分析[A];廣東省電機(jī)工程學(xué)會2003-2004年度優(yōu)秀論文集[C];2005年

相關(guān)重要報紙文章 前2條

1 樊巍;嘉峪關(guān)供電春檢開門紅[N];中國電力報;2007年

2 張金財(cái) 張君;山東電力檢修公司急除線路缺陷[N];國家電網(wǎng)報;2014年

相關(guān)碩士學(xué)位論文 前3條

1 薛海軍;基于熱電類比及參數(shù)辨識的高壓架空導(dǎo)線斷股溫升模型研究[D];南京理工大學(xué);2017年

2 于海濤;同步發(fā)電機(jī)斷股時電磁場與溫度場分析及穩(wěn)態(tài)端部場計(jì)算[D];哈爾濱理工大學(xué);2010年

3 李安;輸電線路導(dǎo)線斷股的圖像檢測方法[D];華北電力大學(xué);2013年

，

本文編號：2403788