Design Method for Improving Damping Characteristics of Virtual Synchronous Generator

被引：0
|
作者：
Ma Y. [1 ]
Yang H. [1 ]
Qu Z. [1 ]
Xin H. [1 ]
Han J. [2 ]
机构：
[1] College of Electrical Engineering, Zhejiang University, Hangzhou
[2] Inner Mongolia Electric Power Research Institute, Inner Mongolia Power(Group) Co., Ltd., Hohhot
来源：
Yang, Huan (yanghuan@zju.edu.cn) | 1600年 / Power System Technology Press卷 / 45期
基金：
中国国家自然科学基金;
关键词：
Compensation method; Line inductance; Negative damping characteristics; Virtual excitation regulator; Virtual synchronous generator;
D O I：
10.13335/j.1000-3673.pst.2019.1857
中图分类号：
学科分类号：
摘要：
Virtual synchronous generator (VSG) control based on virtual synchronization mechanism can increase the equivalent inertia of power system and improve grid stability. However, because VSG simulates the electromechanical transient characteristics of conventional synchronous generator (SG), it also exhibits the dynamic stability problem of SG. This paper established a dynamic model of VSG, and found that line inductance could produce an equivalent negative damping torque to the VSG system. Through analysis using complex torque coefficient method, it is found out that virtual excitation regulator could also superimpose damping torque in control loop, but with the risk of power oscillation. In order to improve the damping characteristics of the system, this paper put forward a virtual impedance control strategy to compensate the equivalent damping of inductance. Besides, a design method of virtual power system stabilizer (PSS) is proposed to compensate the equivalent torque of virtual excitation regulator. Finally, a simulation platform is built to verify the negative damping characteristics of VSG and effectiveness of the compensation method. © 2021, Power System Technology Press. All right reserved.
引用
收藏
页码：269 / 275
页数：6
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