TY - GEN
T1 - Fractional-Order LCαL Filter-Based Grid Connected PV Systems
AU - El-Khazali, Reyad
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - this paper introduces a new class of fractional-order LCL (FoLCL) low-pass filters to mitigate current harmonics caused by inverters in grid connected photovoltaic (PV) systems. Usually LCL filters interconnect inverters to utility grids to filter out harmonics produced by inverters. This produces resonance that causes instability to the overall system. A fractional-order capacitor of impedance 1/SαCα is proposed to replace the integer-order capacitor in LCL filter with its fractional-order counterpart to form a LCαL filter. Unlike what is normally used in passive damping, the dynamics of the fractional-order capacitors exhibit intrinsic passive damping effect of fractional-order 0 < α < 1, which can be controlled to minimize heat dissipation due to the embedded passive damper in fractional-order capacitors,.Cα ≡ Cα Besides introducing an intrinsic controllable resistance that depends on LCαL, the filter provides wider bandwidth to mitigate higher order resonance frequencies than its integer-order counterpart. The performance analysis of the proposed filters is verified via numerical simulations.
AB - this paper introduces a new class of fractional-order LCL (FoLCL) low-pass filters to mitigate current harmonics caused by inverters in grid connected photovoltaic (PV) systems. Usually LCL filters interconnect inverters to utility grids to filter out harmonics produced by inverters. This produces resonance that causes instability to the overall system. A fractional-order capacitor of impedance 1/SαCα is proposed to replace the integer-order capacitor in LCL filter with its fractional-order counterpart to form a LCαL filter. Unlike what is normally used in passive damping, the dynamics of the fractional-order capacitors exhibit intrinsic passive damping effect of fractional-order 0 < α < 1, which can be controlled to minimize heat dissipation due to the embedded passive damper in fractional-order capacitors,.Cα ≡ Cα Besides introducing an intrinsic controllable resistance that depends on LCαL, the filter provides wider bandwidth to mitigate higher order resonance frequencies than its integer-order counterpart. The performance analysis of the proposed filters is verified via numerical simulations.
KW - and resonance damping
KW - fractional-order capacitors
KW - Grid-connected inverters
KW - LCL filter
KW - Photovoltaic (PV) systems
UR - http://www.scopus.com/inward/record.url?scp=85074967627&partnerID=8YFLogxK
U2 - 10.1109/MWSCAS.2019.8885133
DO - 10.1109/MWSCAS.2019.8885133
M3 - Conference contribution
AN - SCOPUS:85074967627
T3 - Midwest Symposium on Circuits and Systems
SP - 533
EP - 536
BT - 2019 IEEE 62nd International Midwest Symposium on Circuits and Systems, MWSCAS 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 62nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2019
Y2 - 4 August 2019 through 7 August 2019
ER -