具有综合负荷模拟的暂态稳定裕度灵敏度分析

负荷的模拟对暂态稳定分析结果有十分重要的影响。常用的负荷模拟方法是恒定阻抗模拟和综合负荷模拟。结合时域仿真，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化的灵敏度分析方法，提出的灵敏度分析方法能够得出大扰动下非线性微分方程组状态变量解在任意时刻的灵敏度，当变量不是很大时，一阶灵敏度具有较好的精度，暂态稳定裕度灵敏度能用于暂稳控制装置地点选择、安全校正再调度中系统稳定裕度约束和在线稳定监示。

SENSITIVITY ANALYSIS OF TRANSIENT STABLE MARGIN WITH COMPLICATED LOAD MODELING

Load modeling is extremely important fortransient stability analysis. There are two kinds of loadmodeling: one is constant impedance modeling and the other is complicated load modeling. Based on the time domainsimulation, a sensitivity analysis method of the stability margin, i.e., the accelerating area, the decelerating area and decelerating power of generator, with respect to the node active and reactive power and the transformer ratio in the transient process with complicated load modeling is proposed. The sensitivity of the state variables of the non-linear differential equations underlarger disturbance at any time can be obtained by using the method proposed in this paper. When the changes of the node power are not too great, the first order sensitivity method has good accuracy. The sensitivity of stability margin can be used in the location selection of transient stability control devices, stability margin constraint of security based economic dispatch and on-line stability monitoring. Practical system analysis is presented.