基于稳定域边界理论的暂态稳定指标及其应用  

Transient Stability Index of Power Systems Based on Theory of Stability Region and Its Applications

作　　者：薛安成[1] 沈沉[1] 梅生伟[1] 倪以信[2] 吴复立[2] 

机构地区：[1]清华大学电机系电力系统国家重点实验室 [2]香港大学电机与电子工程学系

出　　处：《电力系统自动化》2006年第8期1-6,26,共7页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217900)国家自然科学基金资助项目(50377018;50595411)香港政府大学研究基金资助项目(HKU7176/03E)~~

摘　　要：基于故障后电力系统稳定域边界的隐式方程,提出了隐式的暂态稳定指标,并利用稳定域的二次近似方法给出了该暂态稳定指标的一个近似估计。进一步,将所得的暂态稳定指标应用于临界切除时间计算和故障排序,其中临界切除时间由求解暂态稳定指标和切除时间的拟合二次方程得出,故障的严重程度排序由比较该暂态稳定指标直接得出。最后,在IEEE 3机9节点和新英格兰10机39节点系统中进行的仿真结果验证了所提出的暂态稳定指标的准确性。This paper presents a new transient stability index based on the implicit expression for the stability region boundary and an approximation of the proposed index based on the quadratic approximation of the stability region. The proposed index may have no constraints such as the existence of Lyapunov-type energy function. Two applications, calculating the critical clearing time and contingency ranking, are presented based on the approximated index. The critical clearing time is obtained by the quadratic equation that fits the relation between the transient stability index and clearing time. The contingency ranking results are obtained directly by comparing the values of the transient stability index of different contingencies. Simulations in IEEE 3-machine 9-bus system and 10 machine 39-bus New England system show the applicability of the proposed transient stability index.

关 键 词：暂态稳定指标 稳定域 二次近似 临界切除时间 故障排序 

分 类 号：TM712[电气工程—电力系统及自动化]