【摘要】：電力電纜是輸送電能的重要途徑,準確計算電力電纜溫度場與額定載流量對工程實際意義重大�，F(xiàn)階段,電纜的額定載流量根據(jù)IEC標準計算,但運行中的電纜敷設方式多樣,影響載流量的可變因素眾多,僅參照IEC標準計算載流量會造成一定誤差,且IEC標準無法計算電纜的暫態(tài)溫度。本文以有限元法為基礎,分析了電纜載流量與其影響因素之間的關系,并對應急負荷下電纜的溫升響應進行研究,實現(xiàn)對現(xiàn)行電纜的合理利用。首先,介紹了基于有限元法計算電力電纜溫度場的基本原理。結(jié)合電力電纜的散熱特性,給出了電力電纜的溫度場控制方程、電纜熱源和邊界條件,推導了電纜溫度場的計算過程,進而得到電纜穩(wěn)態(tài)、暫態(tài)溫度場。其次,搭建了空氣中敷設的單根66kV含光纖電力電纜試驗平臺,在恒定負荷和變負荷的條件下開展溫升試驗,通過試驗驗證有限元法計算電纜溫度場的正確性和分布式光纖測溫系統(tǒng)測溫的可靠性。最后,建立了單、雙回直埋電力電纜溫度場模型。對于單回直埋電力電纜,分析了空氣溫度、空氣對流換熱系數(shù)、土壤溫度、土壤導熱系數(shù)、電纜間距、電纜埋深與載流量之間的關系,對于雙回直埋電力電纜,分析了水平一字型、上下一字形、水平三角形三種排列方式下的載流量,給出了提高和改善電力電纜載流量的合理建議。計算單線增容允許增容時間,繪制應急負荷-允許增容時間的曲線,供電力調(diào)度參考;雙線增容時有雙線同時增容、單線輪流增容兩種方案可供選擇,計算并比較兩種方案所能提供的增容時間,結(jié)果表明雙線同時增容可提供更長的增容時間。
[Abstract]:Power cable is an important way to transmit electric energy. It is of great significance to calculate accurately the temperature field and rated load current of power cable. At present, the rated capacity of the cable is calculated according to the IEC standard, but the cable laying mode in operation is various, and there are many variable factors that affect the carrier discharge. Only referring to the IEC standard, the calculation of the current carrying capacity will cause certain errors. And the IEC standard can not calculate the transient temperature of the cable. On the basis of finite element method, this paper analyzes the relationship between cable load and its influencing factors, and studies the response of cable temperature rise under emergency load, so as to realize the reasonable utilization of current cable. Firstly, the basic principle of calculating the temperature field of power cable based on finite element method is introduced. Combined with the heat dissipation characteristics of power cable, the control equation of temperature field, the heat source and boundary conditions of power cable are given. The calculation process of cable temperature field is deduced, and the steady and transient temperature field of power cable is obtained. Secondly, a test platform of single 66kV power cable with optical fiber was set up in the air, and the temperature rise test was carried out under the condition of constant load and variable load. The correctness of the finite element method for calculating cable temperature field and the reliability of distributed optical fiber temperature measurement system are verified by experiments. Finally, the temperature field model of single and double direct buried power cable is established. The relationship between air temperature, air convection heat transfer coefficient, soil temperature, soil thermal conductivity, cable spacing, buried depth of cable and load current is analyzed for single-circuit direct-buried power cable. This paper analyzes the load current of three kinds of arrangement modes: horizontal type, upper and lower glyph, and horizontal triangle, and gives some reasonable suggestions for increasing and improving the load current of power cable. To calculate the capacity increase time of single line, draw the curve of emergency load and allowable capacity time for the reference of electric power dispatching; when adding capacity on two lines, there are two lines to increase capacity at the same time, and the two schemes of single line alternate capacity increase can be chosen. The results show that both lines can provide longer compatibilization time.
【學位授予單位】：東北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM75

【參考文獻】

相關期刊論文 前10條

1 魯志偉;張航;敖明;于海;李艷飛;;電纜載流量試驗熱穩(wěn)定判據(jù)及試驗誤差的研究[J];東北電力大學學報;2016年05期

2 于海;李偉;王娜娜;張金桂;;基于有限元的電力電纜過負荷運行能力研究[J];黑龍江電力;2014年05期

3 陳西平;張龍;劉斌;孫振權;李洪杰;;基于地下電纜表面溫度的土壤熱參數(shù)評估及載流量預測[J];中國電力;2014年09期

4 魯志偉;胡國偉;李艷飛;李明;張磊;敖明;;地下直埋電力電纜周期載流量的數(shù)值計算[J];電工電能新技術;2013年04期

5 于建立;隋琳琳;田際平;胡國偉;李艷飛;;預埋管電纜載流量的有限容積法計算和分析[J];東北電力大學學報;2013年03期

6 婁娟;周天鴻;張光普;李明;張磊;;220kV電力電纜本體熱阻特性的試驗研究[J];東北電力大學學報;2013年Z1期

7 梁永春;趙靜;閆彩紅;;溝槽電纜溫度場和載流量的數(shù)值計算[J];高電壓技術;2012年11期

8 梁永春;王巧玲;閆彩紅;趙靜;李彥明;王金源;;三維有限元法在局部穿管直埋電纜溫度場和載流量計算中的應用[J];高電壓技術;2011年12期

9 雷鳴;劉剛;邱景生;賴育庭;劉毅剛;簡淦楊;;單芯電纜線芯溫度的非線性有限元法實時計算[J];電網(wǎng)技術;2011年11期

10 劉剛;雷成華;;提高單芯電纜短時負荷載流量的試驗分析[J];高電壓技術;2011年05期

相關碩士學位論文 前4條

1 馮海濤;電力電纜線芯溫度估算方法研究[D];大連理工大學;2013年

2 賀偉;基于分布式光纖的電纜溫度監(jiān)測系統(tǒng)及其數(shù)據(jù)處理研究[D];長沙理工大學;2011年

3 隆輝;分布式溫度傳感技術在電纜溫度監(jiān)測中的應用研究[D];電子科技大學;2010年

4 張洪麟;基于有限元法的地下電纜溫度場和載流量的計算及仿真[D];重慶大學;2009年

，

本文編號：2180968