【摘要】：高壓電纜運(yùn)行時將在地下鋼筋混凝土排管中產(chǎn)生銅耗和鐵耗。而這些損耗,包括電纜本身的損耗,不僅浪費了電能,同時還將影響電纜和排管的溫度場分布。為解決傳輸線電流在傳統(tǒng)鋼筋混凝土地下電纜排管中產(chǎn)生渦流損耗而造成的電能浪費問題,論文將有限元數(shù)值分析技術(shù)應(yīng)用于地下復(fù)雜環(huán)境渦流—溫度場的分析與計算。提出了地下電纜排管渦流—溫度耦合場的三維有限元模型,兼顧求解速度和計算精度需求的剖分方法以及多物理耦合場的迭代求解方法。論文通過對幾種典型鋼筋混凝土結(jié)構(gòu)地下電纜排管的渦流場與溫度場的數(shù)值分析,得到了在不同工況下典型鋼筋混凝土結(jié)構(gòu)地下電纜排管中金屬構(gòu)件的渦流分布,整個場域的溫度場分布和諧態(tài)工況下的電纜線芯溫度。并據(jù)此提出了玻璃纖維筋(Glass Fiber Reinforced Polymer,GFRP)代替?zhèn)鹘y(tǒng)鋼筋的解決方案,通過數(shù)值仿真計算了替換后電纜排管中溫度場的分布,進(jìn)而從技術(shù)角度論證方案的可行性。論文對比分析了以實際工程為依托的兩種典型結(jié)構(gòu)電纜排管的技術(shù)特點和經(jīng)濟(jì)性能。數(shù)值分析結(jié)果表明,基于玻璃纖維筋電纜排管的替代方案在降低渦流損耗的同時具有更好的經(jīng)濟(jì)效益。
[Abstract]:Copper and iron consumption will be produced in underground reinforced concrete pipe arrangement when high voltage cable is running. These losses, including the loss of the cable itself, not only waste electricity, but also affect the temperature field distribution of the cable and the arrangement pipe. In order to solve the problem of power waste caused by vortex loss caused by transmission line current in traditional reinforced concrete underground cable pipe arrangement, the finite element numerical analysis technique is applied to the analysis and calculation of vortex temperature field in underground complex environment. A three-dimensional finite element model of vortex-temperature coupling field for underground cable arrangement is proposed, which takes into account the requirements of solving speed and calculation accuracy, and an iterative method for solving multi-physical coupling field. Based on the numerical analysis of the Eddy current field and temperature field of several typical reinforced concrete structure underground cable pipes, the Eddy current distribution of metal components in the underground cable arrangement pipe of typical reinforced concrete structure under different working conditions, the temperature field distribution of the whole field and the cable core temperature under harmonic condition are obtained in this paper. Based on this, the solution of replacing the traditional steel bar with glass fiber reinforcement (Glass Fiber Reinforced Polymer,GFRP) is put forward, and the distribution of temperature field in the replaced cable pipe is calculated by numerical simulation, and the feasibility of the scheme is demonstrated from the technical point of view. In this paper, the technical characteristics and economic performance of two typical cable arrangement pipes based on practical engineering are compared and analyzed. The results of numerical analysis show that the alternative scheme based on glass fiber reinforced cable arrangement has better economic benefits while reducing vortex loss.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM75

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