發(fā)布時間：2018-02-21 00:44

  本文關(guān)鍵詞： 覆冰 稱重法 風(fēng)偏角 傾斜角 影響因素 耐張塔 工程應(yīng)用　出處：《華南理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：目前的輸電線路覆冰監(jiān)測技術(shù)大多基于稱重法原理進行，該方法簡單、直接、技術(shù)應(yīng)用相對成熟，因而被廣泛用于國內(nèi)的架空線路覆冰在線監(jiān)測系統(tǒng)中。南方電網(wǎng)輸電線路災(zāi)害（覆冰）預(yù)警系統(tǒng)雖然應(yīng)用了基于稱重法的直線塔覆冰計算模型，但對角度、拉力傳感器誤差及個數(shù)、垂直檔距等因素的影響規(guī)律未細致考慮，且沒有提出耐張塔的覆冰計算模型和考慮其模型各種因素的影響，造成覆冰監(jiān)測系統(tǒng)直線塔模型不完善，耐張塔無法監(jiān)測的問題。 本論文首先介紹了南方電網(wǎng)輸電線路災(zāi)害（覆冰）預(yù)警系統(tǒng)的總體結(jié)構(gòu)及其存在的問題。針對應(yīng)用于覆冰監(jiān)測系統(tǒng)原有的直線塔計算模型不完善問題，，將直線塔計算模型細化為I串、雙I串、V串、雙V串和八字串等五種串型下的模型，對包括風(fēng)偏角及傾斜角、拉力傳感器誤差、垂直檔距和拉力傳感器個數(shù)等直線塔計算模型影響因素進行了分析。針對覆冰監(jiān)測系統(tǒng)缺少耐張塔覆冰計算模型的問題，本論文提出了耐張塔理論計算模型和簡化計算模型，并分別對不同位置的張力、代表檔距和風(fēng)偏角三個因素對覆冰計算的影響進行了不同覆冰工況下的研究，驗證了簡化計算模型。最后采用圖像與冰厚變化曲線對比分析的方法，驗證了架空線路直線塔和耐張塔覆冰計算模型工程具有良好的應(yīng)用效果，并闡述了工程應(yīng)用中模型存在的問題及解決方案。 在分析覆冰模型影響因素時，由于模型的參數(shù)、不同電壓等級線路較多，設(shè)計條件下的導(dǎo)線張力及覆冰工況也多種多樣，導(dǎo)致不可能對所有情況進行全部分析，因此得到的結(jié)論的一般性還有待進一步提高。
[Abstract]:Most of the current ice monitoring techniques for transmission lines are based on the weighing method. This method is simple, direct, and its application is relatively mature. Therefore, it is widely used in the on-line monitoring system of overhead line icing in China. Although the transmission line disaster (icing) early warning system of Southern Power Grid applies the calculation model of linear tower icing based on weighing method, the angle of the system is analyzed. The influence of the error and number of tension sensors, vertical spacing and other factors are not considered carefully, and the calculation model of icing of tension tower is not put forward, and the influence of various factors on the model is considered, which results in the imperfect model of line tower of icing monitoring system. A problem that cannot be monitored by a tensioning tower. This paper first introduces the overall structure and existing problems of the transmission line disaster (icing) early warning system in Southern Power Grid, aiming at the imperfect calculation model of the linear tower used in the icing monitoring system. The calculation model of linear tower is divided into five types: I string, double I string V string, double V string and eight character string. The influence factors of linear tower calculation model, such as vertical distance and the number of tension sensors, are analyzed. In view of the lack of icing calculation model of tension tower in icing monitoring system, the theoretical calculation model and simplified calculation model of tension tower are put forward in this paper. The effects of three factors, namely tension at different positions, distance between wind and wind, on the calculation of icing are studied under different icing conditions, and the simplified calculation model is verified. Finally, the method of contrast analysis between image and ice thickness variation curve is adopted. It is verified that the calculation model engineering of overhead line tower and tension tower has good application effect, and the problems and solutions of the model in engineering application are expounded. When analyzing the influencing factors of the icing model, because of the parameters of the model, there are more lines with different voltage levels, the lead tension and icing conditions under the design conditions are also varied, which makes it impossible to analyze all the cases. Therefore, the generality of the conclusion needs to be further improved.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM752

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本文編號：1520509