TY - JOUR
T1 - A universal controller for grid-connected voltage-source converters
AU - Harnefors, Lennart
AU - Kukkola, Jarno
AU - Routimo, Mikko
AU - Hinkkanen, Marko
AU - Wang, Xiongfei
PY - 2021/10
Y1 - 2021/10
N2 - The power-synchronization control (PSC) and vector current control (VCC), the latter including cascaded outer loops, are, respectively, considered to be grid-forming and grid-following schemes. They have significant structural differences. Despite that, it is here shown that the two schemes can be unified by making a series of minor modifications to PSC. This results in a universal controller, allowing various combinations of the two schemes to be explored. Fundamentally, it allows PSC to be used as a guideline for a robust VCC design, permitting stable and well-performing operation irrespective of the grid strength.
AB - The power-synchronization control (PSC) and vector current control (VCC), the latter including cascaded outer loops, are, respectively, considered to be grid-forming and grid-following schemes. They have significant structural differences. Despite that, it is here shown that the two schemes can be unified by making a series of minor modifications to PSC. This results in a universal controller, allowing various combinations of the two schemes to be explored. Fundamentally, it allows PSC to be used as a guideline for a robust VCC design, permitting stable and well-performing operation irrespective of the grid strength.
KW - Grid-connected converters
KW - Grid-following control
KW - Grid-forming control
KW - Robustness
KW - Voltage-source converters
UR - http://www.scopus.com/inward/record.url?scp=85096833481&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2020.3039407
DO - 10.1109/JESTPE.2020.3039407
M3 - Article
SN - 2168-6777
VL - 9
SP - 5761
EP - 5770
JO - IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
JF - IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
IS - 5
ER -