同义词
1)direct axis subtransient impedance,直轴次瞬变阻抗2)direct-axis subtransient impedance,直轴次暂态阻抗，直轴次瞬变阻抗3)quadrature-axis subtransient impedance,交轴次瞬变阻抗4)direct axis subtransient impedance,直轴超瞬变阻抗5)direct axis transient impedance,直轴瞬变阻抗6)direct axis subtransient reactance,直轴次瞬变电抗
