摘要
对现有的电压稳定裕度指标分析方法进行了总结和评述。对复杂系统采用Ｐ—Ｖ或Ｑ—Ｖ曲线分析电压稳定的局限性进行了讨论，指出Ｐ—Ｖ，Ｑ—Ｖ曲线是描述简单系统（两维空间）电压稳定性的工具，但并不能很好地描述复杂系统（多维空间）的电压稳定性。当选定区域的负荷节点功率增长，其它负荷节点功率保持不变时，判断是否到达负荷极限点的判据ｄλ／ｄｋ＝０并不一定成立。最后，还指出了计算裕度指标时所面临的困难。
The state of the art of voltage stability margin indices is summarized and evaluated. The limitations of using P-V and Q-V curves to analyze voltage stability in complex system are discussed. P-V and Q-V curves are the tools for analyzing voltage stability of simple system (two dimensions), but they are not suitable for describing complex system (multiple dimensions) sometimes. When the load demand in a specific area increases, and the load demands in other areas keep constant, the criterion dλ/dk=0, which is often used to decide whether the system reaches its saddle-node bifurcation point, is not always true. The problems of calculating margin indices are also pointed out.
出处
《电力系统自动化》
EI
CSCD
北大核心
1999年第8期52-55,60,共5页
Automation of Electric Power Systems
基金
国家自然科学基金
关键词
电力系统
电压稳定
裕度指标
power systems voltage stability margin index
