基于轨迹灵敏度的能量裕度灵敏度解析算法

电力系统参数的变化对系统稳定性有很大的影响，如何确定这些参数的变化在给定故障情况下对系统稳定性的影响、改变哪些参数对系统稳定性影响更大具有重要意义。提出了一种系统能量裕度灵敏度的解析算法，从能量裕度的数学表达式出发，利用能量裕度的全微分公式进行灵敏度计算。该方法计算比较灵活，考虑了发电机动态过程对轨迹灵敏度的影响，计算能量裕度对系统参数的灵敏度。该算法在IEEE50机系统中进行了测试。

An energy margin sensitivity calculation based on trajectory sensitivity

Power system parameter variations have great influences on system stability and it is important to know which parameter variations are more decidable to system stability. An energy margin sensitivity calculation of power system is presented in this paper. The calculation method, based on mathematics expression of energy margin, uses full differential equation to calculate the sensitivity of energy margin, considers the influence of generator dynamic motion on trajectory sensitivity, and calculates the sensitivity of energy margin on system parameters. This method has been tested in IEEE 50-machine system and achieves good result.