Stability Analysis of SVI Multi-parallel System Based on Impedance Method

被引：0
|
作者：
Chen, Wei [1 ,2 ]
Wei, Zheng [1 ]
Lei, Xinyu [1 ]
Zhou, Shaoze [1 ]
Song, Xinzhe [1 ]
Wang, Wei [1 ]
机构：
[1] NARI Grp Corp, State Grid Elect Power Res Inst, Nanjing 211106, Peoples R China
[2] Nanjing Normal Univ, Sch Elect & Automat Engn, Nanjing 210023, Peoples R China
来源：
PROCEEDINGS OF 2023 INTERNATIONAL CONFERENCE ON WIRELESS POWER TRANSFER, VOL 4, ICWPT 2023 | 2024年 / 1161卷
关键词：
Renewable Energy Generation; Self-synchronous Voltage Source; SVI; Impedance Model; Stability;
D O I：
10.1007/978-981-97-0869-7_17
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 renewable energy generation system based on Self-synchronous Voltage-source Inverter (SVI) has various stability problems nowadays, so it is necessary to analyze the stability of SVI multi-parallel system. Firstly, the impedance model is established based on the control strategy of SVI, and an SVI multi-unit impedance equivalent model is proposed and verified by the sweep-frequency simulation. Then, according to the impedance stability criterion, a bode diagram is used to analyze the stability of the system under the series-complemented grid. In the case of the series-complemented grid, the phase angle margin decreases when the series-complemented degree is higher, the stability decreases, and oscillation is likely to occur in the sub-synchronous frequency band of 20 Hz-30 Hz. Finally, the correctness and accuracy of the stability analysis are verified by the simulation of the 3-unit parallel system in MATLAB.
引用
收藏
页码：164 / 172
页数：9
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