Small-Signal Stability Research of Grid-Connected Virtual Synchronous Generators

被引：14
作者：
Lu, Shengyang [1 ,2 ]
Zhu, Yu [2 ]
Dong, Lihu [1 ]
Na, Guangyu [3 ]
Hao, Yan [1 ]
Zhang, Guanfeng [2 ]
Zhang, Wuyang [2 ]
Cheng, Shanshan [1 ]
Yang, Junyou [1 ]
Sui, Yuqiu [1 ,3 ]
机构：
[1] Shenyang Univ Technol, Sch Elect Engn, Shenyang 110870, Peoples R China
[2] State Grid Liaoning Elect Power Supply Co Ltd, Elect Power Res Inst, Shenyang 110006, Peoples R China
[3] State Grid Liaoning Elect Power Supply Co Ltd, Shenyang 110006, Peoples R China
来源：
ENERGIES | 2022年 / 15卷 / 19期
关键词：
virtual synchronous generator (VSG); low-frequency oscillation; small-signal model; stability analysis; TRANSIENT STABILITY; FREQUENCY; OSCILLATIONS; INVERTERS;
D O I：
10.3390/en15197158
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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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页数：17
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