【摘要】：隨著經(jīng)濟(jì)的發(fā)展,社會對電力的需求越來越高,在此背景下,為節(jié)約線路走廊、減少城市土地占用同時也節(jié)約電力基礎(chǔ)建設(shè)的開支,高壓架空輸電線路均采用同塔雙回乃至同塔多回的電力傳輸方式進(jìn)行電能傳輸。同塔多回輸電技術(shù)提高了單位線路的電力傳輸容量,但同時也帶來了一些問題,如:由于電力傳輸線的高電壓等級(220k V、500kV、800k V、1000k V等),在鄰近線路上會產(chǎn)生很大的感應(yīng)電壓和感應(yīng)電流,特別是在其中一回或者幾回電路進(jìn)行停運(yùn)檢修時,它所產(chǎn)生的感應(yīng)電壓和感應(yīng)電流對檢修工作人員來說是一個極大的安全隱患。因此需要對同塔雙回、多回架空輸電線的感應(yīng)電壓、電流計算方法進(jìn)行研究,并以此探究如何保障人員安全。本文主要根據(jù)架空輸電線路的工作特點,首先對架空輸電線路中感應(yīng)電壓產(chǎn)生的原理和計算原理進(jìn)行理論分析;然后闡述了應(yīng)用于輸電線路的感應(yīng)電壓研究的同塔雙回架空輸電線路模型,并應(yīng)用EMTP仿真軟件對同塔雙回架空輸電線路感應(yīng)電壓的影響因素,如:線路長度、線路載荷、線路換位方式、并聯(lián)電抗器情況、土壤電阻率等進(jìn)行了定量計算和分析;最后根據(jù)不同因素同感應(yīng)電壓的影響程度,提出了適用于工程計算的線路感應(yīng)電壓計算方法。本文的研究將對線路的設(shè)計以及相關(guān)接地開關(guān)的選擇、保障人員安全有著一定的指導(dǎo)意義。
[Abstract]:With the development of economy, the demand for electric power is increasing. In order to save the corridor, reduce the occupation of urban land and save the expenditure of electric power infrastructure, High-voltage overhead transmission line adopts the same tower double circuit and even the same tower multi-circuit electric power transmission mode to carry on the electric energy transmission. Multi-circuit transmission technology in the same tower improves the transmission capacity of unit lines, but it also brings some problems. For example, because of the high voltage level of the power transmission line (220kV / 500kV / 800kV / 1000kV etc.), large inductive voltage and inductive current will be generated on the adjacent lines, especially when one or more of the circuits are shut down and overhauled. The inductive voltage and current generated by it is a great safety hazard for maintenance workers. Therefore, it is necessary to study the calculation method of inductive voltage and current of double-circuit and multi-circuit overhead transmission lines in the same tower, and to explore how to ensure the safety of personnel. According to the working characteristics of overhead transmission lines, the principle and calculation principle of induction voltage generation in overhead transmission lines are analyzed in this paper. Then the model of the same tower double overhead transmission line applied to the research of the induction voltage of the transmission line is expounded, and the influence factors of the inductive voltage of the same tower double overhead transmission line, such as the line length, the line load, and the simulation software of EMTP, are discussed. The transmission line transposition mode, parallel reactor situation, soil resistivity and so on are calculated and analyzed quantitatively. Finally, according to the influence degree of the same inductive voltage of different factors, the calculation method of line inductive voltage suitable for engineering calculation is put forward. The research in this paper will have certain guiding significance to the design of the line and the selection of the related earthing switch and to ensure the safety of the personnel.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM75

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本文編號：2204338