Fractional-Order LCαL Filter-Based Grid Connected PV Systems

Reyad El-Khazali

doi:10.1109/MWSCAS.2019.8885133

Fractional-Order LC^αL Filter-Based Grid Connected PV Systems

Reyad El-Khazali

Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

10 Scopus citations

Abstract

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/S^αC_α is proposed to replace the integer-order capacitor in LCL filter with its fractional-order counterpart to form a LC^αL 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,.C^α ≡ C_α Besides introducing an intrinsic controllable resistance that depends on LC^αL, 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.

Original language	British English
Title of host publication	2019 IEEE 62nd International Midwest Symposium on Circuits and Systems, MWSCAS 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	533-536
Number of pages	4
ISBN (Electronic)	9781728127880
DOIs	https://doi.org/10.1109/MWSCAS.2019.8885133
State	Published - Aug 2019
Event	62nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2019 - Dallas, United States Duration: 4 Aug 2019 → 7 Aug 2019

Publication series

Name	Midwest Symposium on Circuits and Systems
Volume	2019-August
ISSN (Print)	1548-3746

Conference

Conference	62nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2019
Country/Territory	United States
City	Dallas
Period	4/08/19 → 7/08/19

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

and resonance damping
fractional-order capacitors
Grid-connected inverters
LCL filter
Photovoltaic (PV) systems

Access to Document

10.1109/MWSCAS.2019.8885133

Cite this

@inproceedings{a695fb79d62f479da83e6a022816c461,

title = "Fractional-Order LCαL Filter-Based Grid Connected PV Systems",

abstract = "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.",

keywords = "and resonance damping, fractional-order capacitors, Grid-connected inverters, LCL filter, Photovoltaic (PV) systems",

author = "Reyad El-Khazali",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 62nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2019 ; Conference date: 04-08-2019 Through 07-08-2019",

year = "2019",

month = aug,

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language = "British English",

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El-Khazali, R 2019, Fractional-Order LC^αL Filter-Based Grid Connected PV Systems. in 2019 IEEE 62nd International Midwest Symposium on Circuits and Systems, MWSCAS 2019., 8885133, Midwest Symposium on Circuits and Systems, vol. 2019-August, Institute of Electrical and Electronics Engineers Inc., pp. 533-536, 62nd IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2019, Dallas, United States, 4/08/19. https://doi.org/10.1109/MWSCAS.2019.8885133

Fractional-Order LC^αL Filter-Based Grid Connected PV Systems. / El-Khazali, Reyad.
2019 IEEE 62nd International Midwest Symposium on Circuits and Systems, MWSCAS 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 533-536 8885133 (Midwest Symposium on Circuits and Systems; Vol. 2019-August).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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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.

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KW - fractional-order capacitors

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