Minimum characteristic loci method for power system small disturbance stability analysis

被引：0
|
作者：
Huang W. [1 ]
Zhang Q. [2 ]
Xu H. [2 ]
Wu S. [2 ]
Gan D. [1 ]
机构：
[1] Yunnan Electric Power Dispatching and Control Center, Kunming
[2] College of Electrical Engineering, Zhejiang University, Hangzhou
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 12期
关键词：
characteristic loci; electric power systems; generalized Nyquist curve; phase-angle compensation; small disturbance stability;
D O I：
10.16081/j.epae.202205025
中图分类号：
学科分类号：
摘要：
A small disturbance stability analysis method based on Nyquist characteristic loci for multi-input multi-output system is proposed，which can quantify the contributions of turbine-governor loop and additional excitation control loop to stability margin. Firstly，a concise Heffron-Phillips model is obtained through block diagram transformation，and then a new stability margin is defined according to the relationship between the generalized Nyquist curve and characteristic loci. Based on the model mentioned above，a linear analytical expression of the stability margin is derived，which includes the turbine-governor loop and the additional excitation control loop，so that their influence on stability margin can be shown clearly. In addition，the proposed method can also be used as the controller parameter setting. Finally，the accuracy and effectiveness of the proposed method are proved by several cases. © 2022 Electric Power Automation Equipment Press. All rights reserved.
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页码：151 / 156+164
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