一种基于故障轨迹的暂态能量裕度计算方法

基于系统故障轨迹求取系统暂态能量裕度可以解决暂态能量函数法的模型适应性问题,在电力系统暂态稳定评估中具有重要意义。深入研究了去掉线性路径假设导致的部分区间内无法沿故障轨迹计算暂态势能的问题,并提出以故障清除时刻为暂态势能参考点和补偿裕度的概念,给出了一种沿故障轨迹的暂态能量裕度计算方法。仿真计算表明了该方法的有效性。

A novel transient energy margin computation method based on fault trajectory

It is of great value to compute transient energy margin (TEM) based on system fault trajectory, because there is no limit for the model of transient energy function by this method. This paper studies the problem deeply that transient potential energy cannot be calculated during some intervals along fault trajectory when linear trajectory assumption is omitted. The idea of using the fault clearing time as the reference for transient potential energy is proposed, and the conception of compensation margin is proposed also, which induces a new method of computing TEM based on fault trajectory. Simulation results indicate the validity of this method.