【摘要】：隨著科技進(jìn)步,人民生活水平不斷提高,全社會(huì)對(duì)電能的需求日益增長(zhǎng)。電纜作為電能在傳輸與應(yīng)用過程中最重要的載體,其負(fù)載電流的最大值被稱為電纜載流量,有關(guān)電纜載流量的研究一直以來都備受重視。迄今為止絕大部分與電纜載流量相關(guān)的研究都是圍繞穩(wěn)態(tài)載流量展開,針對(duì)動(dòng)態(tài)載流量的研究起步較晚,缺乏系統(tǒng)成果。綜合分析電纜動(dòng)態(tài)載流量的研究成果可以得出:電纜導(dǎo)體的溫度是研究動(dòng)態(tài)載流量的重中之重,如果能夠獲得運(yùn)行狀態(tài)下電纜導(dǎo)體的實(shí)時(shí)溫度數(shù)據(jù),就可以根據(jù)數(shù)據(jù)對(duì)電纜的運(yùn)行狀態(tài)進(jìn)行監(jiān)測(cè)和控制;根據(jù)導(dǎo)體溫升特性,指導(dǎo)增加瞬間電纜負(fù)荷的安全調(diào)度問題;同時(shí)有利于電纜負(fù)荷的優(yōu)化和電纜運(yùn)行的維護(hù)。文章在傳統(tǒng)電纜載流量計(jì)算方法基礎(chǔ)上,開展了對(duì)電纜動(dòng)態(tài)載流量熱路模型的研究,主要工作如下:首先,進(jìn)行電纜溫度場(chǎng)的動(dòng)態(tài)計(jì)算。詳細(xì)論證了電纜溫度場(chǎng)模型的構(gòu)建及計(jì)算方法,通過引入傳熱學(xué)經(jīng)典理論將電纜熱路模型與電路模型進(jìn)行類比。在傳統(tǒng)電纜載流量計(jì)算方法基礎(chǔ)上對(duì)電纜溫度場(chǎng)計(jì)算進(jìn)行探究,編寫Matlab程序?qū)崿F(xiàn)穩(wěn)態(tài)載流量與動(dòng)態(tài)變化載流量?jī)煞N情況下電纜各層溫度的實(shí)時(shí)計(jì)算。既驗(yàn)證了計(jì)算值相對(duì)保守的經(jīng)典載流量,又得出電纜可拓展的實(shí)際載流量。然后,探究了外部熱源對(duì)電纜載流量的影響。根據(jù)IEC60287-3-3(2005)標(biāo)準(zhǔn)中介紹的交叉熱源條件下電纜載流量計(jì)算公式,結(jié)合電纜周圍熱源對(duì)環(huán)境溫度的影響,依據(jù)Kennelly原理,利用迭代法,分別計(jì)算得出單個(gè)交叉熱源與多個(gè)交叉熱源所引起的載流量降低因數(shù)。最后,設(shè)計(jì)電纜動(dòng)態(tài)載流量與溫度場(chǎng)的分析系統(tǒng)。結(jié)合遼寧勘察設(shè)計(jì)院對(duì)雁昌甲線13#和雁昌乙線13#的工程建設(shè)概況,在已知電纜數(shù)據(jù)參數(shù)和基本敷設(shè)情況下,應(yīng)用Matlab中的GUI功能設(shè)計(jì)電纜動(dòng)態(tài)載流量溫度場(chǎng)分析系統(tǒng)。實(shí)現(xiàn)了復(fù)雜情況下電纜溫度場(chǎng)數(shù)據(jù)的動(dòng)態(tài)分析并預(yù)測(cè)相應(yīng)情況下電纜實(shí)際負(fù)載,為電纜動(dòng)態(tài)載流量預(yù)測(cè)和溫度場(chǎng)分析的工程應(yīng)用打下基礎(chǔ)。
[Abstract]:With the progress of science and technology, the standard of living of the people is improving, and the demand for electric energy is increasing day by day. As the most important carrier of electric energy transmission and application, the maximum load current of cable is called cable current. Up to now, most of the researches related to cable current are focused on steady current, but the research on dynamic current starts late and lacks of systematic results. It is concluded that the temperature of the cable conductor is the most important part of the research on the dynamic load current of the cable. If the real-time temperature data of the cable conductor can be obtained, It can monitor and control the running state of the cable according to the data, direct the safe dispatch problem of increasing the instantaneous cable load according to the characteristic of conductor temperature rise, and be beneficial to the optimization of cable load and the maintenance of cable operation at the same time. Based on the traditional cable load calculation method, this paper studies the hot circuit model of cable dynamic carrier current. The main work is as follows: firstly, the dynamic calculation of cable temperature field is carried out. The construction and calculation method of cable temperature field model are discussed in detail. By introducing the classical theory of heat transfer, the cable thermal circuit model is compared with the circuit model. Based on the traditional cable load calculation method, the cable temperature field calculation is studied, and the Matlab program is written to realize the real-time calculation of the cable temperature under the condition of steady load current and dynamic change carrier current. It not only verifies the classical carrier current which is relatively conservative in calculation, but also obtains the extensible actual load current of the cable. Then, the influence of external heat source on cable current is explored. According to the calculation formula of cable load under the condition of cross heat source introduced in IEC60287-3-3 (2005) standard, combined with the influence of heat source around cable on environmental temperature, according to the principle of Kennelly, the iterative method is used. The carrier flow reduction factors caused by single cross heat source and multiple cross heat sources are calculated respectively. Finally, the analysis system of cable dynamic load current and temperature field is designed. Combined with the general situation of the engineering construction of Yanchang A Line 13# and Yanchang B Line 13# in Liaoning Prospecting and Design Institute, under the known cable data parameters and the basic laying conditions, the GUI function in Matlab is used to design the cable dynamic carrier temperature field analysis system. The dynamic analysis of cable temperature field data under complex conditions and the prediction of cable actual load under corresponding conditions are realized, which lays a foundation for the engineering application of cable dynamic load prediction and temperature field analysis.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM75

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