An Active Compensator to Counteract the Effects of Grid Impedance in Grid-Connected Inverter with an LCL Filter

Yuanbin He; Lijun Hang; Xiaogao Xie; Shu-hung Chung; Xiaoqing Zhan

doi:10.1109/ECCE.2018.8557364

An Active Compensator to Counteract the Effects of Grid Impedance in Grid-Connected Inverter with an LCL Filter

Yuanbin He^*, Lijun Hang, Xiaogao Xie, Shu-hung Chung, Xiaoqing Zhan^*

^*Corresponding author for this work

Centre for Smart Energy Conversion and Utilization Research

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

To improve the stability of grid-connected inverter with an LCL filter, existing approaches are to reshape the inverter output impedance by damping filter resonance with passive or active damping methods. However, the interaction between the inverter and the grid still challenges the system performance especially when the grid becomes weak. This paper proposes an active compensator to counteract the effects of grid impedance on the stability of grid-connected inverter with an LCL filter. It is composed of dual unit PCC voltage feedforward mechanisms, wherein one is integrated into the inverter control, and the other is combined with a bidirectional dc/ac voltage source converter (B-VSC) in series at the filter capacitor branch. The power loss of the B-VSC is small and thereby the system efficiency is not sacrificed. To validate its effectiveness, a single-phase inverter prototype with the proposed compensator has been built.

Original language	English
Title of host publication	10th Anniversary ECCE 2018, IEEE ENERGY CONVERSION CONGRESS & EXPO
Publisher	IEEE
Pages	5579-5585
ISBN (Electronic)	9781479973125
ISBN (Print)	9781479973118
DOIs	https://doi.org/10.1109/ECCE.2018.8557364
Publication status	Published - Sept 2018
Event	10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018) - Portland, United States Duration: 23 Sept 2018 → 27 Sept 2018 http://www.ieee-ecce.org/2018/

Publication series

Name	IEEE Energy Conversion Congress and Exposition
ISSN (Print)	2329-3721

Conference

Conference	10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018)
Abbreviated title	ECCE 2018
Place	United States
City	Portland
Period	23/09/18 → 27/09/18
Internet address	http://www.ieee-ecce.org/2018/

Research Keywords

inverter
LCL filter
grid impedance cancellator
active damping
DESIGN
VOLTAGE

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He, Y., Hang, L., Xie, X., Chung, S., & Zhan, X. (2018). An Active Compensator to Counteract the Effects of Grid Impedance in Grid-Connected Inverter with an LCL Filter. In 10th Anniversary ECCE 2018, IEEE ENERGY CONVERSION CONGRESS & EXPO (pp. 5579-5585). Article 8557364 (IEEE Energy Conversion Congress and Exposition). IEEE. https://doi.org/10.1109/ECCE.2018.8557364

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title = "An Active Compensator to Counteract the Effects of Grid Impedance in Grid-Connected Inverter with an LCL Filter",

abstract = "To improve the stability of grid-connected inverter with an LCL filter, existing approaches are to reshape the inverter output impedance by damping filter resonance with passive or active damping methods. However, the interaction between the inverter and the grid still challenges the system performance especially when the grid becomes weak. This paper proposes an active compensator to counteract the effects of grid impedance on the stability of grid-connected inverter with an LCL filter. It is composed of dual unit PCC voltage feedforward mechanisms, wherein one is integrated into the inverter control, and the other is combined with a bidirectional dc/ac voltage source converter (B-VSC) in series at the filter capacitor branch. The power loss of the B-VSC is small and thereby the system efficiency is not sacrificed. To validate its effectiveness, a single-phase inverter prototype with the proposed compensator has been built.",

keywords = "inverter, LCL filter, grid impedance cancellator, active damping, DESIGN, VOLTAGE",

author = "Yuanbin He and Lijun Hang and Xiaogao Xie and Shu-hung Chung and Xiaoqing Zhan",

year = "2018",

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doi = "10.1109/ECCE.2018.8557364",

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booktitle = "10th Anniversary ECCE 2018, IEEE ENERGY CONVERSION CONGRESS & EXPO",

address = "United States",

note = "10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018), ECCE 2018 ; Conference date: 23-09-2018 Through 27-09-2018",

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He, Y, Hang, L, Xie, X, Chung, S & Zhan, X 2018, An Active Compensator to Counteract the Effects of Grid Impedance in Grid-Connected Inverter with an LCL Filter. in 10th Anniversary ECCE 2018, IEEE ENERGY CONVERSION CONGRESS & EXPO., 8557364, IEEE Energy Conversion Congress and Exposition, IEEE, pp. 5579-5585, 10th Annual IEEE Energy Conversion Congress and Exposition (ECCE 2018), Portland, United States, 23/09/18. https://doi.org/10.1109/ECCE.2018.8557364

An Active Compensator to Counteract the Effects of Grid Impedance in Grid-Connected Inverter with an LCL Filter. / He, Yuanbin; Hang, Lijun; Xie, Xiaogao et al.
10th Anniversary ECCE 2018, IEEE ENERGY CONVERSION CONGRESS & EXPO. IEEE, 2018. p. 5579-5585 8557364 (IEEE Energy Conversion Congress and Exposition).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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AU - He, Yuanbin

AU - Hang, Lijun

AU - Xie, Xiaogao

AU - Chung, Shu-hung

AU - Zhan, Xiaoqing

PY - 2018/9

Y1 - 2018/9

N2 - To improve the stability of grid-connected inverter with an LCL filter, existing approaches are to reshape the inverter output impedance by damping filter resonance with passive or active damping methods. However, the interaction between the inverter and the grid still challenges the system performance especially when the grid becomes weak. This paper proposes an active compensator to counteract the effects of grid impedance on the stability of grid-connected inverter with an LCL filter. It is composed of dual unit PCC voltage feedforward mechanisms, wherein one is integrated into the inverter control, and the other is combined with a bidirectional dc/ac voltage source converter (B-VSC) in series at the filter capacitor branch. The power loss of the B-VSC is small and thereby the system efficiency is not sacrificed. To validate its effectiveness, a single-phase inverter prototype with the proposed compensator has been built.

AB - To improve the stability of grid-connected inverter with an LCL filter, existing approaches are to reshape the inverter output impedance by damping filter resonance with passive or active damping methods. However, the interaction between the inverter and the grid still challenges the system performance especially when the grid becomes weak. This paper proposes an active compensator to counteract the effects of grid impedance on the stability of grid-connected inverter with an LCL filter. It is composed of dual unit PCC voltage feedforward mechanisms, wherein one is integrated into the inverter control, and the other is combined with a bidirectional dc/ac voltage source converter (B-VSC) in series at the filter capacitor branch. The power loss of the B-VSC is small and thereby the system efficiency is not sacrificed. To validate its effectiveness, a single-phase inverter prototype with the proposed compensator has been built.

KW - inverter

KW - LCL filter

KW - grid impedance cancellator

KW - active damping

KW - DESIGN

KW - VOLTAGE

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BT - 10th Anniversary ECCE 2018, IEEE ENERGY CONVERSION CONGRESS & EXPO

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ER -

An Active Compensator to Counteract the Effects of Grid Impedance in Grid-Connected Inverter with an LCL Filter

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