Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping

Yang Qi; Yi Tang

doi:10.1109/ECCE.2018.8557945

Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping

Yang Qi
, Yi Tang

Nanyang Technological University

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

Abstract

In islanded microgrids, harmonic currents of nonlinear loads are expected to be properly shared among parallel inverters, and this is normally achieved by shaping the effective harmonic impedance, i.e., the sum of inverter output impedance and transmission line impedance, through virtual impedance controls. However, for low-frequency inverters, harmonic virtual impedances may not be directly implemented due to the bandwidth limitation of the voltage controller. Besides, line impedances with mismatched magnitudes and angles can lead to inaccurate harmonic current sharing results. To solve these issues, this paper proposes an orthogonal impedance-sharing control, which can dynamically adjust the phase and magnitude of the effective impedance. The proposed method is widely applicable with different line impedances, and its effectiveness is validated though simulation/experimental results.

Original language	English
Title of host publication	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	3150-3155
Number of pages	6
ISBN (Electronic)	9781479973118
DOIs	https://doi.org/10.1109/ECCE.2018.8557945
State	Published - 3 Dec 2018
Externally published	Yes
Event	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States Duration: 23 Sep 2018 → 27 Sep 2018

Publication series

Name	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Conference

Conference	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Country/Territory	United States
City	Portland
Period	23/09/18 → 27/09/18

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Distributed control
Harmonic current sharing
Impedance shaping
Parallel inverters

Access to Document

10.1109/ECCE.2018.8557945

Cite this

Qi, Y., & Tang, Y. (2018). Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 3150-3155). Article 8557945 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8557945

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title = "Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping",

abstract = "In islanded microgrids, harmonic currents of nonlinear loads are expected to be properly shared among parallel inverters, and this is normally achieved by shaping the effective harmonic impedance, i.e., the sum of inverter output impedance and transmission line impedance, through virtual impedance controls. However, for low-frequency inverters, harmonic virtual impedances may not be directly implemented due to the bandwidth limitation of the voltage controller. Besides, line impedances with mismatched magnitudes and angles can lead to inaccurate harmonic current sharing results. To solve these issues, this paper proposes an orthogonal impedance-sharing control, which can dynamically adjust the phase and magnitude of the effective impedance. The proposed method is widely applicable with different line impedances, and its effectiveness is validated though simulation/experimental results.",

keywords = "Distributed control, Harmonic current sharing, Impedance shaping, Parallel inverters",

author = "Yang Qi and Yi Tang",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 ; Conference date: 23-09-2018 Through 27-09-2018",

year = "2018",

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series = "2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018",

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Qi, Y & Tang, Y 2018, Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping. in 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018., 8557945, 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018, Institute of Electrical and Electronics Engineers Inc., pp. 3150-3155, 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018, Portland, United States, 23/09/18. https://doi.org/10.1109/ECCE.2018.8557945

Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping. / Qi, Yang; Tang, Yi.
2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018. Institute of Electrical and Electronics Engineers Inc., 2018. p. 3150-3155 8557945 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018).

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

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T1 - Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping

AU - Qi, Yang

AU - Tang, Yi

PY - 2018/12/3

Y1 - 2018/12/3

N2 - In islanded microgrids, harmonic currents of nonlinear loads are expected to be properly shared among parallel inverters, and this is normally achieved by shaping the effective harmonic impedance, i.e., the sum of inverter output impedance and transmission line impedance, through virtual impedance controls. However, for low-frequency inverters, harmonic virtual impedances may not be directly implemented due to the bandwidth limitation of the voltage controller. Besides, line impedances with mismatched magnitudes and angles can lead to inaccurate harmonic current sharing results. To solve these issues, this paper proposes an orthogonal impedance-sharing control, which can dynamically adjust the phase and magnitude of the effective impedance. The proposed method is widely applicable with different line impedances, and its effectiveness is validated though simulation/experimental results.

AB - In islanded microgrids, harmonic currents of nonlinear loads are expected to be properly shared among parallel inverters, and this is normally achieved by shaping the effective harmonic impedance, i.e., the sum of inverter output impedance and transmission line impedance, through virtual impedance controls. However, for low-frequency inverters, harmonic virtual impedances may not be directly implemented due to the bandwidth limitation of the voltage controller. Besides, line impedances with mismatched magnitudes and angles can lead to inaccurate harmonic current sharing results. To solve these issues, this paper proposes an orthogonal impedance-sharing control, which can dynamically adjust the phase and magnitude of the effective impedance. The proposed method is widely applicable with different line impedances, and its effectiveness is validated though simulation/experimental results.

KW - Distributed control

KW - Harmonic current sharing

KW - Impedance shaping

KW - Parallel inverters

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M3 - 会议稿件

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BT - 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

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ER -

Qi Y, Tang Y. Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018. Institute of Electrical and Electronics Engineers Inc. 2018. p. 3150-3155. 8557945. (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). doi: 10.1109/ECCE.2018.8557945

Enhancing the Harmonic Current Sharing Performance of Low-Switching-Frequency Inverters though Dynamic Impedance Reshaping

Abstract

Publication series

Conference

UN SDGs

Keywords

Access to Document

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