Influence of bifurcation theory based load model on voltage stability of AC/DC hybrid system

被引：0
|
作者：
Li W. [1 ]
Wang Z. [1 ]
Li Z. [1 ]
机构：
[1] College of Electrical Engineering, Shandong University, Jinan
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2020年 / 40卷 / 11期
基金：
中国国家自然科学基金;
关键词：
AC/DC hybrid system; Bifurcation theory; Equilibrium solution mani-fold; Load model; Voltage stability;
D O I：
10.16081/j.epae.202009036
中图分类号：
学科分类号：
摘要：
In order to research the influence of regional load model on voltage stability of AC/DC hybrid power system, a mathematical model considering the dynamic characteristics of each component in the system is established by taking a 3-generator 9-bus AC/DC hybrid power system as an example. The system equilibrium solution manifold is tracked by combining bifurcation theory with continuation method of local parameterization, and the saddle node bifurcation and Hopf bifurcation which affect system stability are searched and detected. On this basis, the influence of different load growth modes on voltage stability is researched, and the differences of load models adopted by the dispatching departments and planning departments in each regional power grid of State Grid Corporation of China are emphatically analyzed and compared. The research shows that the system static and dynamic load margins are the smallest when the load is increased by the year-on-year growth of the whole grid load, which is most unfavorable to the system stability. With the increasing proportion of induction motor in the load model, the bifurcation boundary curve moves forward, the occurrence time of each kind of bifurcation point is shortened, the system voltage stability margin is reduced, and the voltage stability will be more threatened. © 2020, Electric Power Automation Equipment Press. All right reserved.
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页码：144 / 149
页数：5
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