Paper Info
Title
Fault Ride-Through Control Strategy for Single-Phase Virtual Synchronous Generator
Abstract
This paper presents a fault ride-through control strategy for grid-tied virtual synchronous generator (VSG) under two main grid fault conditions, grid voltage sag fault and unintentional grid outage fault. Considering the overcurrent issue of VSG during the grid voltage sag fault, mechanism on overcurrent issue and the relationship among power angle, voltage amplitude, active power and reactive power are analyzed. Based on the analysis, a control strategy based on direct power angle and voltage amplitude control is proposed. Compared to the common control strategy based on additional inner current loop, the proposed VSG requires no add extra voltage or current sensors. For the grid outage fault, detailed analysis on the relationship among power angle, active power and frequency has been conducted, and it is found that the power angle is related to the output active power when the converter operates on grid-tied condition; under unintentional islanding conditions, the power angle is related to the voltage frequency. Based on the found, a detection method based on small frequency disturbance is proposed. Simulation studies on a prototype VSG system are presented to demonstrate the validity of the proposed control strategy.
Year
DOI
Venue
2019
10.1109/ISGT.2019.8791656
2019 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)
Keywords
Field
DocType
Virtual synchronous generator,fault ride-through capability,low voltage ride through,anti-islanding protection
Overcurrent,Computer science,Control theory,Single phase,Voltage,AC power,Virtual synchronous generator,Low voltage ride through,Islanding,Grid
Conference
ISSN
ISBN
Citations 
2167-9665
978-1-5386-8233-3
0
PageRank 
References 
Authors
0.34
0
2
Name
Order
Citations
PageRank
Rong Zeng12510.40
Madhu Chinthavali211.64