Power coupling analysis and improved decoupling control for the VSC connected to a weak AC grid

被引：77
作者：
Shao, Bingbing [1 ]
Xiao, Qi [1 ]
Xiong, Lingfei [2 ]
Wang, Liyuan [3 ]
Yang, Yongheng [4 ]
Chen, Zhe [4 ]
Blaabjerg, Frede [4 ]
Guerrero, Josep M. [4 ]
机构：
[1] Hefei Univ Technol, Anhui Prov Key Lab Renewable Energy Utilizat & Ene, Hefei 230009, Peoples R China
[2] State Grid Econ & Technol Res Inst Co Ltd, Beijing 102209, Peoples R China
[3] State Grid Changfeng Cty Elect Power Supply Co, Hefei 231131, Peoples R China
[4] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark
来源：
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS | 2023年 / 145卷
基金：
中国国家自然科学基金;
关键词：
Decoupling control; Power coupling; Vector control; Voltage source converter; Weak AC grid; VOLTAGE-SOURCE CONVERTERS; DQ-CURRENT CONTROL; VECTOR CONTROL;
D O I：
10.1016/j.ijepes.2022.108645
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Conventional vector control (VC) is widely used in the voltage source converter (VSC) due to its simplicity and power decoupling ability. However, this paper reveals that the VC may result in strong active and reactive power coupling under weak AC grid conditions. The linearized relationship between the power and dq-axis currents is built. On this basis, the power coupling mechanism is revealed, and the power coupling process is presented. Finally, an improved decoupled power control is accordingly proposed based on the feedforward compensation method. The improved decoupling control method can realize more accurate decoupled active and reactive power regulation. Moreover, its design is simple, and thus is easy to be implemented in practice. The power coupling characteristics analysis and the improved power decoupling control are verified through PSCAD/ EMTDC simulations and experiments.
引用
收藏
页数：15
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