Restraint of Start-up Inrush Current of Three-phase VSI Based on Virtual Damping Control
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Restraint of Start-up Inrush Current of Three-phase VSI Based on Virtual Damping Control
Vol. 46, Issue 3, Pages: 1069-1077(2020)
作者机构:
1. 兰州交通大学自动化与电气工程学院
2. 甘肃省轨道交通电气自动化工程实验室
作者简介:
基金信息:
DOI:
CLC:
Published Online:31 March 2020,
Published:2020
稿件说明:
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HE Kaizhong, SU Hongsheng, JIANG Kun, et al. Restraint of Start-up Inrush Current of Three-phase VSI Based on Virtual Damping Control[J]. 2020, 46(3): 1069-1077.
DOI:
HE Kaizhong, SU Hongsheng, JIANG Kun, et al. Restraint of Start-up Inrush Current of Three-phase VSI Based on Virtual Damping Control[J]. 2020, 46(3): 1069-1077.DOI:
Restraint of Start-up Inrush Current of Three-phase VSI Based on Virtual Damping Control
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