节点电压稳定临界状态和弱节点的确定

Determination of the Critical State of Voltage Stability in Load Buses and the Weakest bus of the Power System

本文基于系统电压静态稳定的观点对节点临界状态进行研究。提出了简便、快速计算节点临界状态的方法。研究了电距离、功率因数对临界状态的影响,提出用有功功率裕度反映节点承受负荷功率变化能力的弱节点判别式。

Based on the study of the static voltage stability in electrical power systems, a simple and fast algorithm for determinating the critical state of load bus is proposed. Further study shows that the electrical distance and power factor affect the critical point. This paper therefore proposes a weak bus discriminant, which uses the active power proximity to described the ability of withstanding the load power variation.