LAPSE:2023.9255
Published Article
LAPSE:2023.9255
Small-Signal Stability Research of Grid-Connected Virtual Synchronous Generators
February 27, 2023
Abstract
The virtual synchronous generator (VSG) technique is used to simulate the external characteristics of a synchronous generator (SG) to provide certain damping and inertia to power systems. However, it may easily cause low-frequency oscillation of the power system. We studied the small-signal stability of a grid-connected virtual synchronous generator. Firstly, the small-signal models of single-VSG and multi-VSG grid-connected systems were established. Subsequently, the system eigenvalues were obtained by solving the state matrix, and the system oscillation modes were analyzed. The eigenvalue analysis method was used to analyze the impacts of parameter changes, such as virtual moment of inertia, virtual damping coefficient, line resistance, and line inductance, on system stability. Finally, our conclusions were verified by numerous simulation models.
The virtual synchronous generator (VSG) technique is used to simulate the external characteristics of a synchronous generator (SG) to provide certain damping and inertia to power systems. However, it may easily cause low-frequency oscillation of the power system. We studied the small-signal stability of a grid-connected virtual synchronous generator. Firstly, the small-signal models of single-VSG and multi-VSG grid-connected systems were established. Subsequently, the system eigenvalues were obtained by solving the state matrix, and the system oscillation modes were analyzed. The eigenvalue analysis method was used to analyze the impacts of parameter changes, such as virtual moment of inertia, virtual damping coefficient, line resistance, and line inductance, on system stability. Finally, our conclusions were verified by numerous simulation models.
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Keywords
low-frequency oscillation, small-signal model, stability analysis, virtual synchronous generator (VSG)
Subject
Suggested Citation
Lu S, Zhu Y, Dong L, Na G, Hao Y, Zhang G, Zhang W, Cheng S, Yang J, Sui Y. Small-Signal Stability Research of Grid-Connected Virtual Synchronous Generators. (2023). LAPSE:2023.9255
Author Affiliations
Lu S: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China; Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Zhu Y: Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Dong L: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Na G: State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Hao Y: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Zhang G: Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Zhang W: Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Cheng S: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Yang J: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Sui Y: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China; State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Zhu Y: Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Dong L: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Na G: State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Hao Y: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Zhang G: Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Zhang W: Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Cheng S: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Yang J: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Sui Y: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China; State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang 110006, China
Journal Name
Energies
Volume
15
Issue
19
First Page
7158
Year
2022
Publication Date
2022-09-28
ISSN
1996-1073
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PII: en15197158, Publication Type: Journal Article
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LAPSE:2023.9255
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https://doi.org/10.3390/en15197158
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Feb 27, 2023
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