RT Journal Article
T1 Enhanced resonant current controller for grid-connected converters with LCL filter
A1 Pérez Estévez, Diego
A1 Doval Gandoy, Jesús
A1 Gómez Yepes, Alejandro
A1 López Sánchez, Óscar
A1 Baneira Collazo, Fernando
K1 3307.99 Otras
K1 3306.02 Aplicaciones Eléctricas
AB Conventional resonant controllers (RCs) are commonly used in the current control of grid-tied converters with LCL filter due to their advantages, such as zero steady-state error at both fundamental sequences, easy design process, and straightforward implementation. Nevertheless, these traditional solutions do not permit to place the closed-loop poles of the system in convenient locations when dealing with a fourth-order plant model such as the LCL filter plus the computation delay. Therefore, the reference tracking and the disturbance rejection are deficient in terms of transient behavior and depend on the LCL filter. Furthermore, an additional active damping method usually has to be designed in order to ensure stability. This paper presents an enhanced current RC with stable and fast response, negligible overshoot, good disturbance rejection, and low controller effort for grid-tied converters with LCL filter. The developed solution uses a direct discrete-time pole-placement strategy from the classical control theory (using transfer functions), involving two extra filters, to enhance the performance of the RC. In this manner, the complexity of state-space methods from modern control theory is avoided. Simulation and experimental results are provided to verify the effectiveness of the proposed control scheme.
PB IEEE Transactions on Power Electronics
SN 08858993
YR 2018
FD 2018-05
LK http://hdl.handle.net/11093/5068
UL http://hdl.handle.net/11093/5068
LA eng
NO IEEE Transactions on Power Electronics, 33(5): 3765-3778 (2018)
NO Agencia Estatal de Investigación | Ref. DPI2016-75832-R
DS Investigo
RD 15-mar-2025