应用轨迹灵敏度计算临界切除时间新方法研究

文章提出对故障切除时间轨迹灵敏度的概念和算法。研究了将该轨迹灵敏度映射为（归一化和修正）能量函数的）最小动能灵敏度的方法。并应用上述结果发展了故障临界切除时间的灵敏度分析方法。该方法的优点是灵敏度分析对系统模型没有限制，且具有过程简单、计算效率高的特点。当故障切除时间略大于临界切除时间时，仅需要一次仿真就可以准确地估算临界切除时间。在工程上，该方法可用于快速分析故障的稳定裕度。在10机39节点新英格兰典型电力系统上分析结果验证了该临界切除时间估算算法的精度和有效性。

A NEW TRAJECTORY SENSITIVITIES APPROACH FOR CCT ASSESSMENT

In this paper,new formulations for analysis of trajectory sensitivity with respect to fault clearing time are proposed.Techniques mapping the trajectory sensitivity to sensitivity of minimum kinetic energy of both normalized and corrected energy functions are then presented.Based on the above results,an approach for assessment of critical clearing time (CCT) of faults is developed.Advantages of this approach are that it can be used for CCT assessment of power system represented by complex models with fast speed and high accuracy,which is potential to be used for fast analysis of stability index.This CCT approach is thoroughly tested on the 10-generator 39-bus New England test power system and some results are reported to verify the effectiveness and accuracy of the approach.