TY - JOUR
T1 - Dc microgrid operational method for enhanced service reliability using DC bus signaling
AU - Hwang, Pyeong Ik
AU - Jang, Gilsoo
AU - Pyo, Gi Chan
AU - Han, Byung Moon
AU - Moon, Seung Il
AU - Ahn, Seon Ju
N1 - Publisher Copyright:
© The Korean Institute of Electrical Engineers.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - This paper proposes a DC microgrid operational strategy and control method for improved service reliability. The objective is to supply power to as many non-critical loads as possible, while providing an uninterrupted power supply to critical loads. The DC bus signaling method, in which DC voltage is an information carrier, is employed to implement the operational strategy in a decentralized manner. During grid-connected operation, a grid-tied converter balances the power of the microgrid by controlling the DC voltage. All loads are connected to the microgrid, and operate normally. During islanded operation, distributed generators (DGs), a backup generator, or an energy storage system balances the power. However, some non-critical loads may be disconnected from the microgrid to ensure the uninterrupted power supply to critical loads. For enhanced service reliability, disconnected loads can be automatically reconnected if certain conditions are satisfied. Control rules are proposed for all devices, and detailed microgrid operational modes and transition conditions are then discussed. Additionally, methods to determine control parameter settings are proposed. PSCAD/EMTDC simulation results demonstrate the performance and effectiveness of the proposed operational strategy and control method.
AB - This paper proposes a DC microgrid operational strategy and control method for improved service reliability. The objective is to supply power to as many non-critical loads as possible, while providing an uninterrupted power supply to critical loads. The DC bus signaling method, in which DC voltage is an information carrier, is employed to implement the operational strategy in a decentralized manner. During grid-connected operation, a grid-tied converter balances the power of the microgrid by controlling the DC voltage. All loads are connected to the microgrid, and operate normally. During islanded operation, distributed generators (DGs), a backup generator, or an energy storage system balances the power. However, some non-critical loads may be disconnected from the microgrid to ensure the uninterrupted power supply to critical loads. For enhanced service reliability, disconnected loads can be automatically reconnected if certain conditions are satisfied. Control rules are proposed for all devices, and detailed microgrid operational modes and transition conditions are then discussed. Additionally, methods to determine control parameter settings are proposed. PSCAD/EMTDC simulation results demonstrate the performance and effectiveness of the proposed operational strategy and control method.
KW - Autonomous operation
KW - DC bus signaling
KW - DC microgrid
KW - Decentralized operation
UR - http://www.scopus.com/inward/record.url?scp=84924148742&partnerID=8YFLogxK
U2 - 10.5370/JEET.2015.10.2.452
DO - 10.5370/JEET.2015.10.2.452
M3 - Article
AN - SCOPUS:84924148742
SN - 1975-0102
VL - 10
SP - 452
EP - 464
JO - Journal of Electrical Engineering and Technology
JF - Journal of Electrical Engineering and Technology
IS - 2
ER -