论文标题
瞬时非线性电Q危性问题的伴随变量方法
Adjoint Variable Method for Transient Nonlinear Electroquasistatic Problems
论文作者
论文摘要
电气工程中的许多优化问题都考虑了大量的设计参数。灵敏度分析确定对感兴趣问题影响最大的设计参数。本文介绍了伴随变量方法，是一种有效的方法，用于研究时间域中非线性电质量问题的敏感性。与更常见的直接灵敏度方法相反，伴随变量方法的计算成本几乎与参数数量无关。该方法用于研究场分级材料参数对320 kV电缆接头样品的性能的敏感性，该标本被建模为有限元非线性瞬态电位电位问题。特别注意对特定时间或空间的特定点进行评估的兴趣量。结果表明，该方法是研究这个强烈非线性且高度瞬态技术示例的宝贵工具。
Many optimization problems in electrical engineering consider a large number of design parameters. A sensitivity analysis identifies the design parameters with the strongest influence on the problem of interest. This paper introduces the adjoint variable method as an efficient approach to study sensitivities of nonlinear electroquasistatic problems in time domain. In contrast to the more common direct sensitivity method, the adjoint variable method has a computational cost nearly independent of the number of parameters. The method is applied to study the sensitivity of the field grading material parameters on the performance of a 320 kV cable joint specimen, which is modeled as a Finite Element nonlinear transient electroquasistatic problem. Special attention is paid to the treatment of quantities of interest, which are evaluated at specific points in time or space. It is shown that shown that the method is a valuable tool to study this strongly nonlinear and highly transient technical example.
