TY - JOUR
T1 - A Novel Distributed Secondary Coordination Control Approach for Islanded Microgrids
AU - Lu, Xiaoqing
AU - Yu, Xinghuo
AU - Lai, Jingang
AU - Wang, Yaonan
AU - Guerrero, Josep M.
PY - 2018/7
Y1 - 2018/7
N2 - This paper develops a new distributed secondary cooperative control scheme to coordinate distributed generators (DGs) in islanded microgrids (MGs). A finite time frequency regulation strategy containing a consensus-based distributed active power regulator is presented, which can not only guarantee the active power sharing but also enable all DGs’ frequencies to converge to the reference value within a finite time. This enables the frequency and voltage control designs to be separated. Then an observer-based distributed voltage regulator involving certain reactive power sharing constraints is proposed, which allows different set points for different DGs and, thus, accounts for the line impedance effects. The steady-state performance analysis shows that the voltage regulator can accurately address the issue of global voltage regulation and accurate reactive power sharing. Moreover, all the distributed controllers are equipped with bounded control inputs to suppress the transient overshoot, and they are implemented through sparse communication networks. The effectiveness of the control in case of load variation, plug-and-play capability, communication topology change, link failure, time delays and data drop-out are verified by the simulation of an islanded MG in MATLAB/SimPowerSystems.
AB - This paper develops a new distributed secondary cooperative control scheme to coordinate distributed generators (DGs) in islanded microgrids (MGs). A finite time frequency regulation strategy containing a consensus-based distributed active power regulator is presented, which can not only guarantee the active power sharing but also enable all DGs’ frequencies to converge to the reference value within a finite time. This enables the frequency and voltage control designs to be separated. Then an observer-based distributed voltage regulator involving certain reactive power sharing constraints is proposed, which allows different set points for different DGs and, thus, accounts for the line impedance effects. The steady-state performance analysis shows that the voltage regulator can accurately address the issue of global voltage regulation and accurate reactive power sharing. Moreover, all the distributed controllers are equipped with bounded control inputs to suppress the transient overshoot, and they are implemented through sparse communication networks. The effectiveness of the control in case of load variation, plug-and-play capability, communication topology change, link failure, time delays and data drop-out are verified by the simulation of an islanded MG in MATLAB/SimPowerSystems.
KW - Distributed control
KW - Finite time regulator
KW - Secondary control
KW - Islanded microgrids
UR - http://www.scopus.com/inward/record.url?scp=85047760523&partnerID=8YFLogxK
U2 - 10.1109/TSG.2016.2618120
DO - 10.1109/TSG.2016.2618120
M3 - Journal article
SN - 1949-3053
VL - 9
SP - 2726
EP - 2740
JO - I E E E Transactions on Smart Grid
JF - I E E E Transactions on Smart Grid
IS - 4
ER -