TY - JOUR
T1 - Analysis of the Passive Damping Losses in LCL-Filter-Based Grid Converters
AU - Alzola, Rafael Pena
AU - Liserre, Marco
AU - Blaabjerg, Frede
AU - Sebastián, Rafael
AU - Dannehl, Jörg
AU - Wilhelm Fuchs, Friedrich
PY - 2013/6
Y1 - 2013/6
N2 - Passive damping is the most adopted method to guarantee the stability of LCL-filter-based grid converters. The method is simple and, if the switching and sampling frequencies are sufficiently high, the damping losses are negligible. This letter proposes the tuning of different passive damping methods and an analytical estimation of the damping losses allowing the choice of the minimum resistor value resulting in a stable current control and not compromising the LCL-filter effectiveness. Stability, including variations in the grid inductance, is studied through root locus analysis in the z-plane. The analysis is validated both with simulation and with experiments.
AB - Passive damping is the most adopted method to guarantee the stability of LCL-filter-based grid converters. The method is simple and, if the switching and sampling frequencies are sufficiently high, the damping losses are negligible. This letter proposes the tuning of different passive damping methods and an analytical estimation of the damping losses allowing the choice of the minimum resistor value resulting in a stable current control and not compromising the LCL-filter effectiveness. Stability, including variations in the grid inductance, is studied through root locus analysis in the z-plane. The analysis is validated both with simulation and with experiments.
KW - LCL-filter, Passive damping, Stability, Voltage-source converter
UR - http://www.scopus.com/inward/record.url?scp=84881111390&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2012.2222931
DO - 10.1109/TPEL.2012.2222931
M3 - Letter
SN - 0885-8993
VL - 28
SP - 2642
EP - 2646
JO - I E E E Transactions on Power Electronics
JF - I E E E Transactions on Power Electronics
IS - 6
ER -