基于同步相量和相对电距离的电压静态稳定性评价

论述了负荷特性对相对电距离指标的影响,并与电压稳定性负荷节点指标进行了比较,论证了两种方法的等价性。提出利用从相量测量装置获得的电压和电流相量,并基于静态等值的思想,通过相对电距离指标对各负荷节点的静态电压稳定性进行排序,从而可对关键节点进行监测和控制。多机系统的仿真结果表明了该方法的有效性。

Voltage stability evaluation based on PMUs and relative electrical distance

The influence of load characteristics to the relative electrical distance index is discussed and compared with the voltage stability load bus index. The equivalence of both indexes is proved. Based on the voltage and current phasors derived from phasor measurement units and the basic concept of steady-state equivalence, a method is presented to evaluate the power system voltage stability. The voltage stability for load bus is listed out in terms of the relative electrical distance index to monitor and control for key buses. Simulation results of a test system demonstrate the validity of this method.