TY - GEN
T1 - Power flow control of a single distributed generation unit with nonlinear local load
AU - Dai, Min
AU - Marwali, Mohammad N.
AU - Jung, Jin Woo
AU - Keyhani, Ali
PY - 2004
Y1 - 2004
N2 - Distributed generation units with small energy sources, such as fuel cells, micro-turbines, and photovoltaic devices, can be connected to utility grid as alternative energy sources besides providing power to their local loads. The distributed generation units are interfaced with utility grid using three phase inverters. With inverter control, both active and reactive power pumped into the utility grid from the distributed generation units can be controlled. Reactive power flow control allows the distributed generation units to be used as static var compensation units besides energy sources. This paper presents a distributed generation unit control technique which provides robust voltage regulation with harmonic elimination under island running mode and decoupled active and reactive power flow control under grid-connected mode. The control technique, which combines discrete-time sliding mode current control, robust servomechanism voltage control, and integral power control, enables seamless switching between island mode and grid-connected mode and guarantees sinusoidal line current waveform under nonlinear local load. The P Q coupling issue is addressed and the stability of the power control loop is proved using Lyapunov direct method.
AB - Distributed generation units with small energy sources, such as fuel cells, micro-turbines, and photovoltaic devices, can be connected to utility grid as alternative energy sources besides providing power to their local loads. The distributed generation units are interfaced with utility grid using three phase inverters. With inverter control, both active and reactive power pumped into the utility grid from the distributed generation units can be controlled. Reactive power flow control allows the distributed generation units to be used as static var compensation units besides energy sources. This paper presents a distributed generation unit control technique which provides robust voltage regulation with harmonic elimination under island running mode and decoupled active and reactive power flow control under grid-connected mode. The control technique, which combines discrete-time sliding mode current control, robust servomechanism voltage control, and integral power control, enables seamless switching between island mode and grid-connected mode and guarantees sinusoidal line current waveform under nonlinear local load. The P Q coupling issue is addressed and the stability of the power control loop is proved using Lyapunov direct method.
UR - http://www.scopus.com/inward/record.url?scp=15944401746&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:15944401746
SN - 078038718X
SN - 9780780387188
T3 - 2004 IEEE PES Power Systems Conference and Exposition
SP - 398
EP - 403
BT - 2004 IEEE PES Power Systems Conference and Exposition
T2 - 2004 IEEE PES Power Systems Conference and Exposition
Y2 - 10 October 2004 through 13 October 2004
ER -