發(fā)布時間：2018-01-26 20:27

  本文關鍵詞： 狀態(tài)評估 狀態(tài)檢修 可靠性 FTA　出處：《華北電力大學》2014年碩士論文　論文類型：學位論文

【摘要】：近年來,隨著電網規(guī)模的逐漸擴大,電力網及其線路結構也越來越復雜,國內外的一些大面積連鎖停電事故頻繁發(fā)生,事故造成的后果日益嚴重,對國家經濟發(fā)展、人民生活和國家安全造成了巨大的影響,這使得電力系統(tǒng)的安全可靠運行問題變得越來越突出。如何評估電網在運行過程中特別是在故障狀態(tài)和特殊運行方式下的可靠性水平成為世界各國電力系統(tǒng)面臨的緊迫問題。 本文研究了架空線狀態(tài)評估與狀態(tài)檢修的發(fā)展過程,分析了影響架空線運行可靠性的各種部件缺陷及成因,確定了架空線狀態(tài)評估與狀態(tài)檢修的主要狀態(tài)信息,分析了架空線路狀態(tài)評估與狀態(tài)檢修的各種評估方法,并利用FTA故障樹評判方法,建立了架空線路狀態(tài)評估的數學模型。研究了架空線路狀態(tài)評估與狀態(tài)檢修的評估標準,建立了架空線路狀態(tài)評估與狀態(tài)檢修的各級事件,并提出了相應的權系數計算方法。 最后本文應用VB程序對上述方法進行了評估系統(tǒng)軟件設計,并結合現場收集整理的缺陷和故障數據,將該軟件應用于太原220kV趙匡線,對評估結果與實際運行的可靠性水平進行了比較分析,驗證了所提方法的有效性。結果表明該數學模型簡捷有效,可以得出架空輸電線路不同運行狀態(tài)的各級可靠性指標和相應的薄弱環(huán)節(jié),對于指導架空輸電線路的運行檢修有一定的實用價值。
[Abstract]:In recent years, with the gradual expansion of the scale of the power network, the power network and its line structure is becoming more and more complex, a number of large-scale cascading blackouts occur frequently at home and abroad, the consequences of the accidents are becoming increasingly serious. It has great influence on national economic development, people's life and national security. This makes the problem of safe and reliable operation of power system more and more prominent. How to evaluate the reliability level of power network during operation, especially under the condition of fault state and special operation mode, becomes the face of power system all over the world. The pressing problem of. In this paper, the development process of condition assessment and condition maintenance of overhead lines is studied, and the defects and causes of various components affecting the reliability of overhead lines are analyzed. The main status information of overhead line condition assessment and condition maintenance is determined, and various evaluation methods of overhead line condition assessment and condition maintenance are analyzed, and the FTA fault tree evaluation method is used. The mathematical model of overhead line condition assessment is established, the evaluation standard of overhead line condition assessment and condition maintenance is studied, and the events of overhead line condition evaluation and condition maintenance are established. The calculation method of weight coefficient is put forward. Finally, the software of the evaluation system is designed by VB program, and the software is applied to the 220 kV Zhaoguang line of Taiyuan, combined with the defect and fault data collected and arranged on the spot. The effectiveness of the proposed method is verified by comparing the evaluation results with the reliability level of the actual operation, and the results show that the mathematical model is simple and effective. The reliability indexes and the corresponding weak links of overhead transmission lines in different operation states can be obtained, which has certain practical value for guiding the operation and maintenance of overhead transmission lines.
【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】：TM755

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本文編號：1466509