高压海底电缆金属护套和铠装层损耗的研究

发布时间：2018-03-10 16:51

本文选题：有限元法　切入点：损耗　出处：《哈尔滨理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文从电磁场麦克斯韦基本方程组出发，对涡流场微分方程及其损耗进行推导，给出涡流场的定解条件和边值问题，，同时对二维涡流场条件泛函及有限元分析法进行研究。计算有源均匀传输线等效护套时的传输线工作参数，推导出护套在不同接地状态时的损耗。然后用解析法分别计算金属护套在不同接地状态时金属护套和铠装层的损耗，进行对比可得，无论护套如何接地，钢铠中间段部分的电流近似相等、护套损耗近似相等、铠装损耗近似相等、总损耗也近似相等。用有限元法计算海缆损耗，要先对其边界和边界条件进行确定，这里采用解析法对边界进行计算。由于铠装钢丝的导磁性，单根海缆磁力线的分布主要集中在铠装层，而非导磁材料中分布较少。对铠装层隔磁优化，将隔磁后所得损耗结果与解析法所得结果进行比较可得，隔磁措施的应用能够有效降低铠装和护套中的总损耗，而且隔磁越多，钢丝铠装和护套中的总损耗就降低越多。由于解析法未把涡流损耗考虑进去，所以应在既考虑涡流又考虑非线性时，用有限元法再次对损耗进行计算，并将所得损耗与上述两种方法所得损耗进行比较。由计算结果可知，考虑钢丝铠装层非线性以后得出的钢丝铠装损耗明显降低，总的损耗也随之降低，所得的计算结果比不考虑铠装非线性时要准确。总之，损耗的大小与很多因素有关，在实际的工程应用中，应该根据实际情况进行分析计算。
[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.

【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P756.1

【引证文献】