Presynchronous Grid-Connection Strategy of Virtual Synchronous Generator Based on Virtual Impedance
Joint Authors
Cui, Jia
Zhang, Guanfeng
Yang, Junyou
Wang, Haixin
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-11-09
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The virtual synchronous generator (VSG) technology of inverter is widely used to provide the inertia and damping support for power system.
However, an additional measurement device PLL (phase-locked loop) is required in the virtual synchronous generator grid connection to track the voltage phase, amplitude, and frequency, which restricts the flexible output of the distributed power generation system.
To tackle this challenge, a method for grid-connected control of virtual synchronous generator based on virtual impedance is proposed.
It is assumed that there is a virtual power exchange between the synchronous machine and the power grid when the virtual synchronous generator is off-grid, the virtual impedance is developed to calculate the virtual current, and when the virtual current is zero, the output voltage of the VSG can be synchronized with the voltage of the power grid, thereby seamlessly switching between off-grid and grid-connected VSG.
A semiphysical simulation platform is built based on RT-LAB; simulation and experimental results show that the proposed grid synchronization control strategy of the VSG can achieve seamless transform between different VSG modes, which is simpler than the conventional synchronization control, while having a good active and reactive power tracing performance.
American Psychological Association (APA)
Zhang, Guanfeng& Yang, Junyou& Wang, Haixin& Cui, Jia. 2020. Presynchronous Grid-Connection Strategy of Virtual Synchronous Generator Based on Virtual Impedance. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1194580
Modern Language Association (MLA)
Zhang, Guanfeng…[et al.]. Presynchronous Grid-Connection Strategy of Virtual Synchronous Generator Based on Virtual Impedance. Mathematical Problems in Engineering No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1194580
American Medical Association (AMA)
Zhang, Guanfeng& Yang, Junyou& Wang, Haixin& Cui, Jia. Presynchronous Grid-Connection Strategy of Virtual Synchronous Generator Based on Virtual Impedance. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1194580
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194580