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一种变压器时域场路耦合计算的自适应算法

, PP. 113-119

Keywords: 直流偏磁,时域场路耦合,稳定边界,自适应算法

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Abstract:

采用时域场路耦合模型研究变压器直流偏磁,推导绝对稳定域分析计算收敛性,研究稳定边界对应时间步长h0与状态矩阵特征值的关系,定义磁场求解频率w衡量计算效率,构造动态电感变化函数评价磁场计算精确性。根据绝对稳定域分析步长和w对计算精确性和效率的影响,提出一种基于时域场路耦合模型的自适应变步长算法,并与定步长算法对比,该方法能够根据变压器非线性励磁的时变性自动修正迭代步长,从而提高效率和精确性。实验结果验证了自适应算法的正确性和有效性,为变压器等电磁设备在交直流混合模式下的时域计算提供新思路。

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