【摘要】：導(dǎo)線選型是輸電線路工程規(guī)劃建設(shè)過程中重要的一環(huán),導(dǎo)線選型的結(jié)果直接影響輸電線路的安全性、可靠性和經(jīng)濟(jì)性。在保證系統(tǒng)安全的情況下,研究輸電線路導(dǎo)線選型有著十分現(xiàn)實的意義。 國內(nèi)外工程建設(shè)和研究中對分析導(dǎo)線選型沒有形成系統(tǒng)的、規(guī)范化的研究理論和方法。本文研究高壓直流架空輸電線路導(dǎo)線選型思路和方法,從系統(tǒng)規(guī)劃開始,根據(jù)線路的長度,線路經(jīng)過區(qū)域的氣候條件和地形條件,確定輸電線路的特征參數(shù)和限制條件。通過全壽命周期費用計算方法選擇合適的經(jīng)濟(jì)電流密度,根據(jù)系統(tǒng)輸送能力確定導(dǎo)線的截面,并根據(jù)價格、生產(chǎn)制造和施工工藝以及工程地形條件和氣象條件的綜合情況選定一系列導(dǎo)線；再根據(jù)國內(nèi)外工程與研究的情況、制造和施工工藝情況確定合適的分裂數(shù)和分裂間距。本文采用載流量計算的方法分析和比較導(dǎo)線的輸送容量和傳輸效率；采用直流輸電型式下的皮克公式計算導(dǎo)線的起暈場強；采用馬克特-門格爾法計算分裂導(dǎo)線線電荷；采用"EPRI"經(jīng)驗公式計算導(dǎo)線最大平均表面電場、標(biāo)稱場強；采用半經(jīng)驗公式法計算合成場強和離子流密度；采用國際無線電干擾特別委員會CISPR推薦的無線電干擾場強計算公式來計算無線電干擾水平；采用“BPA"推薦公式和‘'EPRI"推薦公式計算線路的可聽噪聲；通過上述方法判定導(dǎo)線的電氣性能是否滿足要求。根據(jù)線纜生產(chǎn)產(chǎn)品的參數(shù)分析導(dǎo)線的機械性能,采用拉重比的方法判斷導(dǎo)線的弧垂特性,比較在一定應(yīng)力條件下導(dǎo)線的覆冰厚度來判斷導(dǎo)線的過載能力,比較導(dǎo)線的鋁部應(yīng)力判斷導(dǎo)線的耐振抗疲勞性能,比較各類型導(dǎo)線的實際荷載和張力。最后采用全壽命周期費用計算方法對輸電線路的經(jīng)濟(jì)性進(jìn)行比較。本文通過建設(shè)一條高壓直流架空輸電線路為例,采用公式計算和MATLAB編程計算,校驗導(dǎo)線的各項指標(biāo),使之能夠滿足設(shè)計規(guī)范的要求,然后逐步排除,最終選出最優(yōu)方案。 本文的導(dǎo)線選型研究為輸電線路工程的規(guī)劃和設(shè)計提供了程序化和規(guī)范化的理論指導(dǎo)。按照本文介紹的方法,選出的導(dǎo)線既能滿足實際應(yīng)用,符合標(biāo)準(zhǔn)規(guī)范的要求,又能保證安全可靠、經(jīng)濟(jì)合理。本文的方法在實際工程設(shè)計建設(shè)時得到檢驗,并為新型導(dǎo)線的應(yīng)用和推廣提供相關(guān)的經(jīng)驗和依據(jù),具有較好的經(jīng)濟(jì)效益和社會效益。
[Abstract]:Conductor selection is an important part of transmission line project planning and construction. The results of conductor selection directly affect the safety, reliability and economy of transmission line. In order to ensure the safety of the system, the study of transmission line conductor selection has a very practical significance. There is no systematic and standardized research theory and method for analyzing conductor selection in engineering construction and research at home and abroad. In this paper, the train of thought and method of conductor selection for HVDC overhead transmission lines are studied. Starting from the system planning, the characteristic parameters and limiting conditions of transmission lines are determined according to the length of the lines, the climatic conditions and terrain conditions of the transmission lines passing through the region. The appropriate economical current density is selected through the calculation method of the whole life cycle cost, the section of the conductor is determined according to the transmission capacity of the system, and according to the price, A series of conductors are selected according to the production and construction technology as well as the comprehensive conditions of engineering topography and meteorological conditions and the appropriate splitting numbers and spacing are determined according to the conditions of engineering and research at home and abroad. In this paper, the carrier current calculation method is used to analyze and compare the transmission capacity and transmission efficiency of conductors, the Pike formula under direct current transmission type is used to calculate the halo field strength of conductors, and the Maxt-Mengel method is used to calculate the line charges of split conductors. The "EPRI" empirical formula is used to calculate the maximum average surface electric field of the conductor, and the semi-empirical formula is used to calculate the synthetic field strength and ion current density. The radio interference level is calculated by using the radio interference field strength formula recommended by CISPR, and the audible noise of the circuit is calculated by using the "BPA" recommended formula and the 'EPRI' recommended formula. Through the above method, determine whether the electrical performance of the wire meets the requirements. According to the parameters of cable production products, the mechanical properties of conductors are analyzed, and the sagging characteristics of conductors are judged by the method of drawing weight ratio, and the overloading capacity of conductors is judged by comparing the ice thickness of conductors under certain stress conditions. The aluminum stress of conductors is compared to determine the vibration and fatigue resistance of conductors, and the actual loads and tension of various types of conductors are compared. Finally, the economy of transmission line is compared with the whole life cycle cost calculation method. Through the construction of a HVDC overhead transmission line as an example, the formula calculation and MATLAB programming calculation are used to check the various indexes of the conductor, so that it can meet the requirements of the design code, and then gradually exclude, and finally select the optimal scheme. The study of conductor selection in this paper provides a theoretical guidance for the planning and design of transmission line engineering. According to the method introduced in this paper, the selected conductors can not only meet the practical application, meet the requirements of the standard specification, but also ensure the safety, reliability, economy and reasonableness. The method in this paper is tested in practical engineering design and construction, and provides relevant experience and basis for the application and popularization of new type conductors. It has good economic and social benefits.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM721.1

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本文編號：2268014