High Frequency Resonance Characteristics Analysis of Voltage Controlled Virtual Synchronous Generator and Suppression Strategy

被引：0
|
作者：
Li Z. [1 ]
Liu M. [1 ]
Liu H. [2 ,3 ]
Song P. [2 ,3 ]
Li X. [4 ]
Wang F. [5 ]
机构：
[1] School of Electric Engineering, South China University of Technology, Guangdong, Guangzhou
[2] The Electric Power Science Research Institute, State Grid Jibei Electric Power Co., Ltd., North China Electric Power Research Institute Co., Ltd., Beijing
[3] Wind-Solar-Energy Storage Generation Laboratory, State Grid Corporation of China, Beijing
[4] CGN New Energy Holdings Co., Ltd., Beijing
[5] Beijing Power Exchange Center Co., Ltd., Beijing
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2024年 / 52卷 / 02期
关键词：
eigenvalue; high frequency resonance; small-signal model; virtual impedance; virtual synchronous generator;
D O I：
10.12141/j.issn.1000-565X.220635
中图分类号：
学科分类号：
摘要：
Virtual synchronous generator (VSG) simulates the operation mechanism of synchronous generator and introduces active frequency modulation and reactive voltage regulation control link. Different from the traditional current control converter, it is a voltage control strategy. Based on control configuration and power grid and source coordination characteristics, this paper constructed small signal analysis models, analyzed the oscillation modes under variable control parameters and power system parameters. Then it obtained high frequency resonance characteristics of voltage controlled VSG and proposed suppression control strategy. Firstly, this paper established the small-signal analysis models of voltage control virtual synchronous generator and traditional flow converter control and electrical link, respectively. Through eigenvalue analysis method, the oscillation mode and damping ratio of all the eigenvalues were quantitatively analyzed, and it is found that the voltage control virtual synchronous generator has a high frequency oscillation mode similar to the traditional converter. And it analyzed the control parameter change of the virtual synchronous generator and the high frequency resonance damping mechanism of the power grid scene. Then, based on the control strategy of voltage controlled virtual synchronous generator, with the active damping method, the virtual impedance control strategy based on the current inner ring front channel was proposed to suppress the high-frequency resonance. Finally, the proposed control strategy was verified in the loop experiment results using Matlab/Simulink simulation and RT-LAB controller. The results show that the virtual impedance control link effectively plays a positive damping role. Compared with the passive damping method, in the case of no additional measuring point and external control amount, the voltage control VSG network side damping characteristics are improved, the transient response ability is enhanced, and the high frequency instability phenomenon is effectively suppressed. © 2024 South China University of Technology. All rights reserved.
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页码：50 / 61
页数：11
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