TY - JOUR
T1 - Improved synchronverters with bounded frequency and voltage for smart grid integration
AU - Zhong, Qing Chang
AU - Konstantopoulos, George C.
AU - Ren, Beibei
AU - Krstic, Miroslav
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2018
Y1 - 2018
N2 - Synchronverters are grid-friendly inverters that mimic conventional synchronous generators and play an important role in integrating different types of renewable energy sources, electric vehicles, energy storage systems, etc., to the smart grid. In this paper, an improved synchronverter is proposed to make sure that its frequency and voltage always stay within given ranges, while maintaining the function of the original synchronverter. Furthermore, the stability region characterized by the system parameters is analytically obtained, which guarantees that the improved synchronverter is always stable and converges to a unique equilibrium as long as the power exchanged at the terminal is kept within this area. Extensive OPAL-RT real-time simulation results are presented for the improved and the original self-synchronized synchronverters connected to a stiff grid and for the case when two improved synchronverters are connected to the same bus with one operating as a weak grid, to verify the theoretical development.
AB - Synchronverters are grid-friendly inverters that mimic conventional synchronous generators and play an important role in integrating different types of renewable energy sources, electric vehicles, energy storage systems, etc., to the smart grid. In this paper, an improved synchronverter is proposed to make sure that its frequency and voltage always stay within given ranges, while maintaining the function of the original synchronverter. Furthermore, the stability region characterized by the system parameters is analytically obtained, which guarantees that the improved synchronverter is always stable and converges to a unique equilibrium as long as the power exchanged at the terminal is kept within this area. Extensive OPAL-RT real-time simulation results are presented for the improved and the original self-synchronized synchronverters connected to a stiff grid and for the case when two improved synchronverters are connected to the same bus with one operating as a weak grid, to verify the theoretical development.
KW - Bounded frequency range
KW - Bounded voltage range
KW - Smart grid integration
KW - Stability
KW - Synchronverters
KW - Virtual synchronous machines
UR - http://www.scopus.com/inward/record.url?scp=85039854162&partnerID=8YFLogxK
U2 - 10.1109/TSG.2016.2565663
DO - 10.1109/TSG.2016.2565663
M3 - Article
AN - SCOPUS:85039854162
SN - 1949-3053
VL - 9
SP - 786
EP - 796
JO - IEEE Transactions on Smart Grid
JF - IEEE Transactions on Smart Grid
IS - 2
ER -