以稳定指标灵敏度确定发电机有功功率输出极限(英文)

Determination of Generator Active Power Output Limit by Stability Index Sensitivity

轨迹灵敏度提供了将轨迹变化定量化的方法,可揭示由参数或初始条件的微小改变所导致的动态轨迹的变化程度,并能用来探究参数空间的轨迹特征。轨迹分析法是电力系统暂态稳定分析的有效方法,能定量给出反映稳定程度的稳定指标和不稳定指标。文章基于轨迹分析法和轨迹灵敏度提出了一种稳定指标灵敏度计算方法用于估计发电机有功功率输出极限。应用此方法进行了案例研究,把稳定指标灵敏度应用到IEEE-39母线系统,与相应的仿真结果比较而言,所得的结果是令人满意的。

Providing a way to quantify the trajectory variation, trajectory sensitivity can open out the dynamic trajectory change with the （small） changes of parameters and/or initial condition, and is able for investigating the characteristic of trajectory in parameter space. Trajectory analysis method, as an effective approach in power system transient stability study, can provide stable/unstable degree of each generator with stable/unstable indices. This paper proposes an algorithm for the sensitivity of stable index to assesse the generator active power output based on trajectory analysis method and trajectory sensitivity. Case studies are carried out with the algorithm, and as in comparison with the simulation counterparts satisfactory results are obtained by adopting the sensitivity of stable index to the IEEE-39 bus system.