TY - GEN
T1 - Feedback linearization control of non-inverting buck-boost PV power optimizers
AU - Callegaro, Leonardo
AU - Pagano, Daniel J.
AU - Ciobotaru, Mihai
AU - Fletcher, John E.
PY - 2017
Y1 - 2017
N2 - In this paper, a novel control design based on a feedback linearization control (FLC) technique is developed for a Photovoltaic (PV) power optimizer implemented on a non-inverting buck-boost power converter. Unlike the classical local linearization techniques commonly used in the technical literature, this approach allows to obtain large-signal linear equations, by means of the feedback linearization of the non-linear terms. The non-linear model of the buck-boost converter operating in both buck and boost modes is presented, followed by the exact linearization and decoupling model using the FLC technique. From this linearized model, simple proportional and proportional-integral controllers are designed for the inner current and outer voltage control loops, respectively, in a cascaded control strategy. Simulation results demonstrate the effectiveness of this control technique, capable of regulating the PV voltage with consistent transient response, independent of the operating point of the PV source.
AB - In this paper, a novel control design based on a feedback linearization control (FLC) technique is developed for a Photovoltaic (PV) power optimizer implemented on a non-inverting buck-boost power converter. Unlike the classical local linearization techniques commonly used in the technical literature, this approach allows to obtain large-signal linear equations, by means of the feedback linearization of the non-linear terms. The non-linear model of the buck-boost converter operating in both buck and boost modes is presented, followed by the exact linearization and decoupling model using the FLC technique. From this linearized model, simple proportional and proportional-integral controllers are designed for the inner current and outer voltage control loops, respectively, in a cascaded control strategy. Simulation results demonstrate the effectiveness of this control technique, capable of regulating the PV voltage with consistent transient response, independent of the operating point of the PV source.
UR - http://www.scopus.com/inward/record.url?scp=85027851544&partnerID=8YFLogxK
U2 - 10.1109/PEDG.2017.7972451
DO - 10.1109/PEDG.2017.7972451
M3 - Conference proceeding contribution
SN - 9781509053407
BT - 2017 IEEE 8th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
PB - Institute of Electrical and Electronics Engineers (IEEE)
CY - Piscataway, NJ
T2 - International Symposium on Power Electronics for Distributed Generation Systems (8th : 2017)
Y2 - 17 April 2017 through 20 April 2017
ER -