Restraint of Start-up Inrush Current of Three-phase VSI Based on Virtual Damping Control

被引：0
|
作者：
He K. [1 ,2 ]
Su H. [1 ,2 ]
Jiang K. [1 ]
Zeng H. [1 ]
机构：
[1] School of Automation & Electrical Engineering, Lanzhou Jiaotong University, Lanzhou
[2] Rail Transit Electrical Automation Engineering Laboratory of Gansu Province, Lanzhou
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Dynamic current quality; Grid-connected inverter; Inrush current; Start-up process; Virtual damping;
D O I：
10.13336/j.1003-6520.hve.20200331038
中图分类号：
学科分类号：
摘要：
There exists a start-up inrush current problem during the grid-connection period within the three-phase voltage-source inverters(VSI). Consequently, we propose a new method to suppress the inrush current effectively based on the virtual damping control. Firstly, a mathematical model is established based on the dq coordinate frame, and it is recognized that the primary cause of inrush current is the decrement in the damping ratio during the grid-connection period. Then, the detailed design process of the virtual damping control method is given, and the correctness and effectiveness of the proposed method are verified by simulation and experiments. The results show that the inrush current can be more than twice the rated current before adding virtual damping, the grid connection without inrush current can be realized after adding virtual damping, and it can also improve the robust stability of the system, the dynamic current quality, and equipment safety in operation. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：1068 / 1076
页数：8
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