One is constant impedance modeling , the other is complicated load modeling . based on the time domain simulation , the sensitivity of stability margin with respect to node active and reactive power for the system with complicated load modeling is derived 结合时域仿真,本文提出了具有综合负荷模拟的暂态过程中发电机加速面积、减速面积、减速功率(稳定裕度)对网络节点有功、无功及变压器变比的灵敏度分析方法。