TY - JOUR
T1 - Input-Admittance Passivity Compliance for Grid-Connected Converters With an LCL Filter
AU - Diaz, Enrique Rodriguez
AU - Freijedo, Francisco D.
AU - Guerrero, Josep M.
AU - Marrero-Sosa, Juan Alberto
AU - Dujic, Drazen
PY - 2019/2
Y1 - 2019/2
N2 - This paper presents a design methodology and its experimental validation for the input-admittance passivity compliance of LCL grid-connected converters. The designs of the LCL filter parameters and the discrete controller are addressed systematically, and suitable design guidelines are provided. The controller design is developed in the Z-domain, with capacitor-voltage-based active damping used as a degree of freedom to compensate for system delay effects. The role of resistive components in the circuit, which have inherent dissipative properties, is also discussed. As an outcome of the design, a passive input-admittance shaping is obtained. The theoretical development is further verified in a low-scale prototype supplied from a controllable grid simulator. For the sake of generality, different combinations of resonant to sampling frequency are tested. Experimental results fully prove the input-admittance passivity compliance.
AB - This paper presents a design methodology and its experimental validation for the input-admittance passivity compliance of LCL grid-connected converters. The designs of the LCL filter parameters and the discrete controller are addressed systematically, and suitable design guidelines are provided. The controller design is developed in the Z-domain, with capacitor-voltage-based active damping used as a degree of freedom to compensate for system delay effects. The role of resistive components in the circuit, which have inherent dissipative properties, is also discussed. As an outcome of the design, a passive input-admittance shaping is obtained. The theoretical development is further verified in a low-scale prototype supplied from a controllable grid simulator. For the sake of generality, different combinations of resonant to sampling frequency are tested. Experimental results fully prove the input-admittance passivity compliance.
KW - Admittance measurement
KW - Current control
KW - pulsewidth modulation converters
KW - Stability criteria
UR - http://www.scopus.com/inward/record.url?scp=85046773884&partnerID=8YFLogxK
U2 - 10.1109/TIE.2018.2835374
DO - 10.1109/TIE.2018.2835374
M3 - Journal article
AN - SCOPUS:85046773884
SN - 0278-0046
VL - 66
SP - 1089
EP - 1097
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 2
M1 - 8357486
ER -