TY - GEN
T1 - Bounded droop controller for accurate load sharing among paralleled inverters
AU - Konstantopoulos, George C.
AU - Zhong, Qing Chang
AU - Ren, Beibei
AU - Krstic, Miroslav
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - When paralleled inverters feed a common load, it is required that the load is shared according to their power ratings. In this paper, the robust droop controller (RDC) proposed in the literature for achieving accurate proportional power sharing for paralleled inverters is implemented in a way to ensure a bounded closed-loop performance. Using non-linear Lyapunov methods, it is shown that the controller structure permits the control input to stay within a predefined range. While maintaining the main theory of the RDC, the proposed bounded droop controller (BDC) is proven to guarantee the stability of the closed-loop system in the sense of boundedness for the general load case given in the generalized dissipative Hamiltonian form, which can describe both linear and non-linear load dynamics. Extended simulation results for two single-phase inverters operated in parallel are presented to verify the effectiveness of the BDC for both a linear and a non-linear load case scenario.
AB - When paralleled inverters feed a common load, it is required that the load is shared according to their power ratings. In this paper, the robust droop controller (RDC) proposed in the literature for achieving accurate proportional power sharing for paralleled inverters is implemented in a way to ensure a bounded closed-loop performance. Using non-linear Lyapunov methods, it is shown that the controller structure permits the control input to stay within a predefined range. While maintaining the main theory of the RDC, the proposed bounded droop controller (BDC) is proven to guarantee the stability of the closed-loop system in the sense of boundedness for the general load case given in the generalized dissipative Hamiltonian form, which can describe both linear and non-linear load dynamics. Extended simulation results for two single-phase inverters operated in parallel are presented to verify the effectiveness of the BDC for both a linear and a non-linear load case scenario.
KW - Nonlinear systems
KW - Power systems
KW - Stability of nonlinear systems
UR - http://www.scopus.com/inward/record.url?scp=84905686863&partnerID=8YFLogxK
U2 - 10.1109/ACC.2014.6858824
DO - 10.1109/ACC.2014.6858824
M3 - Conference contribution
AN - SCOPUS:84905686863
SN - 9781479932726
T3 - Proceedings of the American Control Conference
SP - 934
EP - 939
BT - 2014 American Control Conference, ACC 2014
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 4 June 2014 through 6 June 2014
ER -