【摘要】：隨著電力需求日益增加,電網密度逐漸增大,新建線路走廊日益緊缺,而且由于規(guī)劃、建設速度等方面的限制,輸電線路的輸送能力成為電網發(fā)展的瓶頸。因此,必須考慮如何大幅度提高現(xiàn)有輸電線路的傳輸能力,以適應電力增長的需求。這也是節(jié)約新建線路數(shù)量或者降低新建線路造價的有效手段,其經濟、社會效益十分顯著。本文系統(tǒng)地分析了輸電線路最大載流量的計算模型——熱平衡方程,和輸電線路溫度弧垂模型——狀態(tài)方程法；在此基礎上,系統(tǒng)地研究建立了線路的安全判據和預警體系,為實際線路的靜態(tài)增容分析提供了理論支持；以廣東地區(qū)輸電線路作為研究對象,進行了實際線路的靜態(tài)增容分析,考慮了環(huán)境溫度隨季節(jié)的變化,分析計算降低導線運行環(huán)境溫度限額之后,線路最大載流容量的增加情況；考慮了實際風速情況,分析計算提高風速之后,線路最大載流容量的增加情況,以及對提高風速后的線路進行了安全性分析。研究結果表明,靜態(tài)增容技術可以在不增加輸電走廊等額外投資情況下,提高現(xiàn)有線路的輸電容量,且保證線路安全運行。這一結果可為實際線路的運行提供參考。
[Abstract]:With the increasing demand for electricity, the density of power network is increasing, the new line corridor is becoming increasingly scarce, and due to planning, construction speed and other constraints, transmission capacity of transmission lines has become the bottleneck of the development of power grid. Therefore, it is necessary to consider how to greatly improve the transmission capacity of existing transmission lines in order to meet the demand of power growth. This is also an effective means to save the number of new lines or reduce the cost of new lines, and its economic and social benefits are very significant. In this paper, the heat balance equation and the temperature sag model of the transmission line, the state equation method, are systematically analyzed. On this basis, the safety criterion and early warning system of the line are systematically studied and established, which provides the theoretical support for the static capacity increase analysis of the actual line. Taking the transmission lines in Guangdong as the research object, the static capacity increase analysis of the actual lines is carried out, and the variation of the environmental temperature with the season is considered, and the calculation and calculation of reducing the environmental temperature limit of the conductor operation are carried out. The increase of the maximum current carrying capacity of the line; Considering the actual wind speed, the increase of the maximum current carrying capacity of the line after the increase of the wind speed is analyzed, and the safety analysis of the line after the increase of the wind speed is carried out. The results show that the static capacity-increasing technology can increase the transmission capacity of the existing lines without increasing the additional investment such as transmission corridors and ensure the safe operation of the lines. This result can provide a reference for the actual operation of the line.
【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】：TM75

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相關期刊論文 前1條

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本文編號：2398461