本文選題：輸電線路 + 覆冰厚度　； 參考：《華北電力大學》2014年碩士論文

【摘要】：在潮濕低溫的環(huán)境下輸電線路很容易產(chǎn)生覆冰現(xiàn)象，輸電線路覆冰會導致斷線、金具損壞、絕緣子串冰閃、基礎(chǔ)下沉或傾斜，甚至桿塔倒塌、導線接地等事故，，嚴重威脅了電力系統(tǒng)的正常運行，影響了人們正常的生產(chǎn)和生活。因此，加強對輸電線路覆冰厚度監(jiān)測技術(shù)的研究，實時掌握輸電線路的覆冰狀態(tài)對于電力系統(tǒng)的安全穩(wěn)定運行具有十分重要的現(xiàn)實意義。 本文提出了一種輸電線路覆冰在線監(jiān)測系統(tǒng)總體方案設(shè)計，利用張力傳感器、角度傳感器、工業(yè)攝像機、溫度濕度傳感器以及風速風向傳感器采集現(xiàn)場數(shù)據(jù)，通過GPRS網(wǎng)絡和Internet網(wǎng)絡將現(xiàn)場采集到的數(shù)據(jù)傳送到電力系統(tǒng)監(jiān)控中心主站，最終經(jīng)輸電線路覆冰厚度計算軟件得出輸電線路的覆冰厚度。在總體方案設(shè)計的基礎(chǔ)上，對張力傳感器、角度傳感器、GPRS傳輸模塊、電源的選擇原則進行了總結(jié)，并且給出了具體的選型方案。 針對輸電線路覆冰在線監(jiān)測方案中的核心模塊——輸電線路覆冰厚度計算模塊，本文提出了一種基于力學測量的輸電線路覆冰厚度計算模型。該模型考慮了有風與無風兩種情況，以耐張段軸向?qū)Ь�張力、懸掛點傾角和懸垂絕緣子串張力等數(shù)據(jù)為模型的基本特征參數(shù)計算輸電線路覆冰厚度。 通過模擬試驗的方法對本文提出的輸電線路覆冰厚度計算模型進行了驗證，利用鋁線模擬實際輸電線路，利用小型拉力傳感器與懸掛吊環(huán)模擬絕緣子串，在輸電線路上均勻涂抹面團來模擬輸電線路覆冰。對單獨耐張段以及三檔連續(xù)導線的試驗結(jié)果顯示本文提出的輸電線路覆冰厚度計算模型計算誤差較小，能夠滿足計算精度的要求。
[Abstract]:In humid and low temperature conditions, it is easy for transmission lines to be covered with ice. The icing of transmission lines can lead to breakage, damage to hardware, ice flashes of insulators, sinking or tilting of foundations, even collapse of towers, grounding of conductors, and so on. It seriously threatens the normal operation of power system and affects people's normal production and life. Therefore, it is of great practical significance to strengthen the research on the monitoring technology of the icing thickness of the transmission line and to grasp the icing state of the transmission line in real time for the safe and stable operation of the power system. In this paper, an overall scheme of on-line monitoring system for transmission line icing is proposed, which uses tension sensor, angle sensor, industrial camera, temperature and humidity sensor and wind speed and wind direction sensor to collect field data. The data collected in the field are transmitted to the main station of the power system monitoring center through GPRS network and Internet network. Finally, the ice thickness of the transmission line is obtained by the software of icing thickness calculation of transmission line. On the basis of the overall scheme design, the selection principle of the tension sensor, angle sensor GPRS transmission module and power supply is summarized, and the specific selection scheme is given. In view of the core module of on-line monitoring of transmission line icing, the calculation module of transmission line icing thickness, a calculation model of transmission line icing thickness based on mechanical measurement is proposed in this paper. In this model, both wind-free and wind-free conditions are taken into account. The basic characteristic parameters of the model, such as the tension of the axial conductor, the inclination of the suspension point and the tension of the suspended insulator string, are used to calculate the ice thickness of the transmission line. The calculation model of icing thickness of transmission line proposed in this paper is verified by simulation test. The actual transmission line is simulated by aluminum wire, and insulator string is simulated by small tension sensor and suspension ring. Apply dough evenly over the transmission line to simulate the icing of the transmission line. The experimental results of single stretch section and three-stage continuous conductor show that the calculation error of the model proposed in this paper is small and can meet the requirement of calculation accuracy.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM752

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本文編號：1778423