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  本文選題：有限元法　切入點：損耗　出處：《哈爾濱理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：本文從電磁場麥克斯韋基本方程組出發(fā)，對渦流場微分方程及其損耗進(jìn)行推導(dǎo)，給出渦流場的定解條件和邊值問題，，同時對二維渦流場條件泛函及有限元分析法進(jìn)行研究。 計算有源均勻傳輸線等效護(hù)套時的傳輸線工作參數(shù)，推導(dǎo)出護(hù)套在不同接地狀態(tài)時的損耗。然后用解析法分別計算金屬護(hù)套在不同接地狀態(tài)時金屬護(hù)套和鎧裝層的損耗，進(jìn)行對比可得，無論護(hù)套如何接地，鋼鎧中間段部分的電流近似相等、護(hù)套損耗近似相等、鎧裝損耗近似相等、總損耗也近似相等。 用有限元法計算海纜損耗，要先對其邊界和邊界條件進(jìn)行確定，這里采用解析法對邊界進(jìn)行計算。由于鎧裝鋼絲的導(dǎo)磁性，單根海纜磁力線的分布主要集中在鎧裝層，而非導(dǎo)磁材料中分布較少。對鎧裝層隔磁優(yōu)化，將隔磁后所得損耗結(jié)果與解析法所得結(jié)果進(jìn)行比較可得，隔磁措施的應(yīng)用能夠有效降低鎧裝和護(hù)套中的總損耗，而且隔磁越多，鋼絲鎧裝和護(hù)套中的總損耗就降低越多。由于解析法未把渦流損耗考慮進(jìn)去，所以應(yīng)在既考慮渦流又考慮非線性時，用有限元法再次對損耗進(jìn)行計算，并將所得損耗與上述兩種方法所得損耗進(jìn)行比較。由計算結(jié)果可知，考慮鋼絲鎧裝層非線性以后得出的鋼絲鎧裝損耗明顯降低，總的損耗也隨之降低，所得的計算結(jié)果比不考慮鎧裝非線性時要準(zhǔn)確�？傊�，損耗的大小與很多因素有關(guān)，在實際的工程應(yīng)用中，應(yīng)該根據(jù)實際情況進(jìn)行分析計算。
[Abstract]:Based on the Maxwell equations of electromagnetic field, the differential equations of vortices and their losses are derived. The conditions and boundary value problems of vortex flow are given. Meanwhile, two dimensional eddy current conditional functional and finite element analysis methods are studied.
Calculation of active uniform transmission line equivalent transmission line when the sheath parameters derived from sheath loss in various ground state. Then using analytic method to calculate the metal sheath in different ground state metal sheath and armor layer loss, compared to, no matter how sheath grounding, middle section of steel armor the current is approximately equal, sheath loss is approximately equal, armour loss is approximately equal, the total loss is approximately the same.
Cable loss calculation with finite element method, the first on the boundary and the boundary conditions are determined by the analytic method of boundary, here to calculate. Due to magnetic armouring wire, single cable distribution lines are mainly concentrated in the armoring layer, rather than the distribution of less magnetic materials. The armor layer magnetic isolation optimization, the results the magnetic separation after the resulting loss results and analytical method are compared, the application of magnetic isolation measures can effectively reduce the total loss of armored and sheath, and the magnetic steel wire armored and more total loss in sheath decreased more. Because of the analytic method without the eddy current loss into consideration, so we should not only consider eddy current and nonlinear, finite element method is used again to calculate loss, and loss of income and income loss of the above two methods were compared. The calculation results show that the steel armor layer obtained after considering the nonlinear The loss of steel wire armour is obviously reduced, and the total loss is also reduced. The calculated result is more accurate than that without considering the armored nonlinearity. In short, the size of the loss is related to many factors. In practical engineering applications, it should be analyzed and calculated according to the actual situation.

【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P756.1

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 魯加明;趙云;鄭明;余宏強(qiáng);;無功配置對海上風(fēng)電場輸出海纜損耗的影響分析[J];電力建設(shè);2015年06期

相關(guān)碩士學(xué)位論文 前1條

1 譚壹方;基于有限元的高速鐵路饋線電纜護(hù)層感應(yīng)電壓及環(huán)流分析[D];西南交通大學(xué);2015年

本文編號：1594224