基于网络信息的暂态稳定性定量分析--支路势能法

基于结构保持的多机电力系统拓扑暂态能量函数，分析了故障后暂态势能在网络中的分布变化特点，提取出基于网络信息的系统失去稳定时的关键特征量，以构建仅依赖网络信息的以支路势能分析为基础的可定性且可定量评价系统暂态稳定性的方法-支路势能法。该方法建立于电力系统网络信息的动态响应轨迹的基础上，指标的计算简单方便，不仅可用于第一摆、且可应用于多摆的稳定性评价，同时还可用于系统失稳模式、脆弱输电环节的识别，且具有在线应用的潜力。NEW ENGLAND 10机系统的仿真算例验证了该方法的有效性。

BRANCH POTENTIAL ENERGY METHOD FOR POWER SYSTEM TRANSIENT STABILITY ASSESSMENT BASED ON NETWORK DYNAMIC VARIABLES

Based on Topological Energy Function, the feature of line transient energy distributing over network has been studied. And a new transient stability analysis method -Branch Potential Energy Method is proposed, in which the earmark of system instability has been identified and the indices for quantitatively evaluating transmission line and power system stability degree have been established, and it is very simple to compute. The method not only can been used to first-swing and multi-swing stability assessment, but to identify the vulnerable line, critical cutest, and system instability mode. The Simulation on NEW ENGLAND 10 machines testifies the validation of the proposed method.