TY - JOUR
T1 - A decentralized scalable approach to voltage control of DC islanded microgrids
AU - Tucci, Michele
AU - Riverso, Stefano
AU - Quintero, Juan Carlos Vasquez
AU - Guerrero, Josep M.
AU - Ferrari-Trecate, Giancarlo
PY - 2016/11
Y1 - 2016/11
N2 - We propose a new decentralized control scheme for DC Islanded microGrids (ImGs) composed by several Distributed Generation Units (DGUs) with a general interconnection topology. Each local controller regulates to a reference value the voltage of the point of common coupling of the corresponding DGU. Notably, off-line control design is conducted in a plug-and-play fashion meaning that (i) the possibility of adding/removing a DGU without spoiling stability of the overall ImG is checked through an optimization problem; (ii) when a DGU is plugged in or out at most neighboring DGUs have to update their controllers and (iii) the synthesis of a local controller uses only information on the corresponding DGU and lines connected to it. This guarantees total scalability of control synthesis as the ImG size grows or DGUs get replaced. Yet, under mild approximations of line dynamics, we formally guarantee stability of the overall closed-loop ImG. The performance of the proposed controllers is analyzed simulating different scenarios in PSCAD.
AB - We propose a new decentralized control scheme for DC Islanded microGrids (ImGs) composed by several Distributed Generation Units (DGUs) with a general interconnection topology. Each local controller regulates to a reference value the voltage of the point of common coupling of the corresponding DGU. Notably, off-line control design is conducted in a plug-and-play fashion meaning that (i) the possibility of adding/removing a DGU without spoiling stability of the overall ImG is checked through an optimization problem; (ii) when a DGU is plugged in or out at most neighboring DGUs have to update their controllers and (iii) the synthesis of a local controller uses only information on the corresponding DGU and lines connected to it. This guarantees total scalability of control synthesis as the ImG size grows or DGUs get replaced. Yet, under mild approximations of line dynamics, we formally guarantee stability of the overall closed-loop ImG. The performance of the proposed controllers is analyzed simulating different scenarios in PSCAD.
KW - Decentralized control
KW - Plug-and-play
KW - DC microgrid
KW - Islanded microgrid
KW - Voltage control
UR - http://arxiv.org/abs/1503.06292
U2 - 10.1109/TCST.2016.2525001
DO - 10.1109/TCST.2016.2525001
M3 - Journal article
SN - 1063-6536
VL - 24
SP - 1965
EP - 1979
JO - I E E E Transactions on Control Systems Technology
JF - I E E E Transactions on Control Systems Technology
IS - 6
ER -