TY - JOUR
T1 - Passivity-based coordinated control for islanded AC microgrid
AU - Gui, Yonghao
AU - Wei, Baoze
AU - Li, Mingshen
AU - Guerrero, Josep M.
AU - Vasquez, Juan C.
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/11/1
Y1 - 2018/11/1
N2 - A novel passivity-based coordinated control strategy is proposed for an islanded AC microgrid including renewable energy source and energy storage system units. The main advantage is that the proposed coordinated control strategy manages the microgrid without using a phase-locked loop system. In the microgrid, the energy storage system supports the voltage of the microgrid, and the renewable energy sources inject their maximum power to the microgrid in the normal operation. For the energy storage system, we use a proportional-resonant controller, and for the renewable energy sources, we use a voltage modulated direct power control method, which has not only a good tracking performance but also a good steady-state behavior. Another advantage of the proposed method is that the asymptotical stability of the whole microgrid can be guaranteed by using the passivity principle when the heterogeneous renewable energy sources are integrated into the microgrid. To validate the proposed coordinated control law, we use a microgrid consisting of one energy storage system, one wind turbine, one photovoltaic and two controllable loads. Simulation results show that the plug-and-play capability of the wind turbine and photovoltaic in the microgrid is enhanced when comparing with the conventional vector current control method with a phase-locked loop system. Moreover, the voltage and frequency of the microgrid are recovered to its nominal value by the energy storage system with the proposed method as well. Finally, experimental verification of the proposed coordinated control algorithm is performed on a 10 kW microgrid system. The experimental results match the simulation ones as well.
AB - A novel passivity-based coordinated control strategy is proposed for an islanded AC microgrid including renewable energy source and energy storage system units. The main advantage is that the proposed coordinated control strategy manages the microgrid without using a phase-locked loop system. In the microgrid, the energy storage system supports the voltage of the microgrid, and the renewable energy sources inject their maximum power to the microgrid in the normal operation. For the energy storage system, we use a proportional-resonant controller, and for the renewable energy sources, we use a voltage modulated direct power control method, which has not only a good tracking performance but also a good steady-state behavior. Another advantage of the proposed method is that the asymptotical stability of the whole microgrid can be guaranteed by using the passivity principle when the heterogeneous renewable energy sources are integrated into the microgrid. To validate the proposed coordinated control law, we use a microgrid consisting of one energy storage system, one wind turbine, one photovoltaic and two controllable loads. Simulation results show that the plug-and-play capability of the wind turbine and photovoltaic in the microgrid is enhanced when comparing with the conventional vector current control method with a phase-locked loop system. Moreover, the voltage and frequency of the microgrid are recovered to its nominal value by the energy storage system with the proposed method as well. Finally, experimental verification of the proposed coordinated control algorithm is performed on a 10 kW microgrid system. The experimental results match the simulation ones as well.
KW - Coordinated control
KW - Energy storage system
KW - Islanded AC microgrid
KW - Passivity
KW - Renewable energy source
UR - http://www.scopus.com/inward/record.url?scp=85051373415&partnerID=8YFLogxK
U2 - 10.1016/j.apenergy.2018.07.115
DO - 10.1016/j.apenergy.2018.07.115
M3 - Article
AN - SCOPUS:85051373415
SN - 0306-2619
VL - 229
SP - 551
EP - 561
JO - Applied Energy
JF - Applied Energy
ER -