Modeling and Stability Analysis of DC-Link Voltage Control in Multi-VSCs With Integrated to Weak Grid

被引：56
|
作者：
Huang, Yunhui [1 ]
Wang, Dong [2 ]
Shang, Lei [3 ]
Zhu, Guorong [1 ]
Tang, Haiyan [4 ]
Li, Yan [4 ]
机构：
[1] Wuhan Univ Technol, Sch Automat, Wuhan 430074, Hubei, Peoples R China
[2] Univ Hong Kong, Pokfulam, Hong Kong, Peoples R China
[3] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Hubei, Peoples R China
[4] China Elect Power Res Inst, Renewable Energy Dept, Beijing 100192, Peoples R China
来源：
IEEE TRANSACTIONS ON ENERGY CONVERSION | 2017年 / 32卷 / 03期
基金：
中国国家自然科学基金;
关键词：
DC-link voltage; modeling; stability analysis; voltage source converter (VSC); weak grid; WIND TURBINES; GENERATOR; DYNAMICS;
D O I：
10.1109/TEC.2017.2700949
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：
This paper contributes to giving physical insights into stability of DC-link voltage control in multi-wind turbines integrated to weak grid. Wind farm stability operation will suffer from integrating to weak AC grid, due to strong coupling between the wind turbines control and grid dynamics. Multi-VSCs model is presented for DC-link voltage control stability analysis with effect of coupling among VSCs and grid strength. Based on the model, self-impact components and interaction-impact components are presented to study interactions among VSCs. Impacts of VSCs interactions on stability of DC-link voltage control are studied by investigating self-impact and interaction-impact components variations with considering grid strength, operating point and control loop bandwidth. It is found that interactions between VSC1 and VSC2 become more serious with decline of grid strength, decaying stability of VSCs. Theoretical analysis is verified with simulation of two parallel wind turbines connected to weak grid.
引用
收藏
页码：1127 / 1138
页数：12
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