一种电力系统极点分析新方法

A NEW METHOD FOR ANALYZING THE POLES OF POWER SYSTEMS

研究了电力系统多变量Nyquist图相角变化率与其反馈模型开环和闭环极点间的关系。藉助相角变化率的极值点确定系统机械振荡频率的主要集结区域。并在此基础上,分析了发电机与各频率集结区域间的关联特性,为选择PSS的安装位置提供了新方法。

This paper describes a frequency response method for analyzing the small disturbance stability in power systems, as modeled in feedback representations. Based on the investigation for the relationship between the change rate of the phase angle of a Nyquist plot (CRPA) and the poles of the open-loop system or the closed-loop system, the main regions, in which the frequencies of mechanical oscillation modes lie, are determined and their relevant characteristics with the generators are given using the extreme value point of CRPA. Finally, a new method for identifving the location for the PSS is recommended