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基于有限元模型重构的多物理场耦合空心电抗器优化设计

, PP. 71-78

Keywords: 干式空心电抗器,多物理场耦合,模型重构,优化设计,层等电阻电压

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Abstract:

电抗器是电力系统中最为重要的设备之一,如何便捷地设计并优化该类电抗器已成为工程和学术领域的重要课题。本文将电抗器设计和有限元理论结合起来,通过给定的设计指标以及制造方提供的线规,采用遍历搜索法确定电抗器的初设结构参数,以此构建电抗器多物理场耦合有限元模型,求解其“磁场-电路”耦合场来获得电抗器设计优化所需的物理参数,以此代入基于以“层等电阻电压约束”为主、“层等电流密度约束”为辅的邻域搜索优化算法,计算得到优化后的结构尺寸,并按此对电抗器有限元模型进行重构,再次求解,形成一个迭代过程,反复进行该迭代过程,并设定一个收敛条件,最终得到最优解;以磁场求解的各线圈损耗密度为“桥梁”,间接将磁场和“温度-流体”场耦合,求解出电抗器各个包封的温升,对所设计优化的结果进行校核。根据算法“重构”特点,采用Ansys软件实现一体化优化设计,以两个电抗器设计优化为例,优化设计结果与设计指标误差在10%以内,显示出该优化设计算法的实用性。

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