An improved voltage support strategy of grid-connected inverter under unbalanced grid condition

Wang Wei; Li Pengfei; Li Fen; Liu Guihua

doi:10.1109/ITEC-AP.2017.8080886

An improved voltage support strategy of grid-connected inverter under unbalanced grid condition

Wang Wei
, Li Pengfei
, Li Fen
, Liu Guihua

School of Electrical Engineering and Automation, Harbin Institute of Technology

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

Abstract

In order to ensure three-phase grid-connected inverter output voltage symmetry under unbalanced grid voltage, an improved control strategy is proposed in this paper. The proposed control strategy includes power, voltage and current three loops. The complex coefficient-filter (CCF) is used to obtain the positive and negative sequence of unbalance output voltage and current during the grid faults. By calculating output power of the inverter, an improved P+-f and Q+-U droop control strategy is designed to adjust droop curve real-timely. In order to improve the stability of parallel three-phase inverter system, the virtual impedance is further applied. The simulation and experiments results of a 1kVA three-phase grid-connected inverter verify the feasibility of the control strategy.

Original language	English
Title of host publication	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538628942
DOIs	https://doi.org/10.1109/ITEC-AP.2017.8080886
State	Published - 23 Oct 2017
Externally published	Yes
Event	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017 - Harbin, China Duration: 7 Aug 2017 → 10 Aug 2017

Publication series

Name	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

Conference

Conference	2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017
Country/Territory	China
City	Harbin
Period	7/08/17 → 10/08/17

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Complex coefficient-filter
Droop control
Unbalanced grid voltage
Virtual impedance

Access to Document

10.1109/ITEC-AP.2017.8080886

Cite this

Wei, W., Pengfei, L., Fen, L., & Guihua, L. (2017). An improved voltage support strategy of grid-connected inverter under unbalanced grid condition. In 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017 Article 8080886 (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ITEC-AP.2017.8080886

Wei, Wang ; Pengfei, Li ; Fen, Li et al. / An improved voltage support strategy of grid-connected inverter under unbalanced grid condition. 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017. Institute of Electrical and Electronics Engineers Inc., 2017. (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017).

@inproceedings{e4e17a0db3bb460aa2007808e0e30bcd,

title = "An improved voltage support strategy of grid-connected inverter under unbalanced grid condition",

abstract = "In order to ensure three-phase grid-connected inverter output voltage symmetry under unbalanced grid voltage, an improved control strategy is proposed in this paper. The proposed control strategy includes power, voltage and current three loops. The complex coefficient-filter (CCF) is used to obtain the positive and negative sequence of unbalance output voltage and current during the grid faults. By calculating output power of the inverter, an improved P+-f and Q+-U droop control strategy is designed to adjust droop curve real-timely. In order to improve the stability of parallel three-phase inverter system, the virtual impedance is further applied. The simulation and experiments results of a 1kVA three-phase grid-connected inverter verify the feasibility of the control strategy.",

keywords = "Complex coefficient-filter, Droop control, Unbalanced grid voltage, Virtual impedance",

author = "Wang Wei and Li Pengfei and Li Fen and Liu Guihua",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017 ; Conference date: 07-08-2017 Through 10-08-2017",

year = "2017",

month = oct,

day = "23",

doi = "10.1109/ITEC-AP.2017.8080886",

language = "英语",

series = "2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017",

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booktitle = "2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017",

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}

Wei, W, Pengfei, L, Fen, L & Guihua, L 2017, An improved voltage support strategy of grid-connected inverter under unbalanced grid condition. in 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017., 8080886, 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017, Institute of Electrical and Electronics Engineers Inc., 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017, Harbin, China, 7/08/17. https://doi.org/10.1109/ITEC-AP.2017.8080886

An improved voltage support strategy of grid-connected inverter under unbalanced grid condition. / Wei, Wang; Pengfei, Li; Fen, Li et al.
2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017. Institute of Electrical and Electronics Engineers Inc., 2017. 8080886 (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017).

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

TY - GEN

T1 - An improved voltage support strategy of grid-connected inverter under unbalanced grid condition

AU - Wei, Wang

AU - Pengfei, Li

AU - Fen, Li

AU - Guihua, Liu

PY - 2017/10/23

Y1 - 2017/10/23

N2 - In order to ensure three-phase grid-connected inverter output voltage symmetry under unbalanced grid voltage, an improved control strategy is proposed in this paper. The proposed control strategy includes power, voltage and current three loops. The complex coefficient-filter (CCF) is used to obtain the positive and negative sequence of unbalance output voltage and current during the grid faults. By calculating output power of the inverter, an improved P+-f and Q+-U droop control strategy is designed to adjust droop curve real-timely. In order to improve the stability of parallel three-phase inverter system, the virtual impedance is further applied. The simulation and experiments results of a 1kVA three-phase grid-connected inverter verify the feasibility of the control strategy.

AB - In order to ensure three-phase grid-connected inverter output voltage symmetry under unbalanced grid voltage, an improved control strategy is proposed in this paper. The proposed control strategy includes power, voltage and current three loops. The complex coefficient-filter (CCF) is used to obtain the positive and negative sequence of unbalance output voltage and current during the grid faults. By calculating output power of the inverter, an improved P+-f and Q+-U droop control strategy is designed to adjust droop curve real-timely. In order to improve the stability of parallel three-phase inverter system, the virtual impedance is further applied. The simulation and experiments results of a 1kVA three-phase grid-connected inverter verify the feasibility of the control strategy.

KW - Complex coefficient-filter

KW - Droop control

KW - Unbalanced grid voltage

KW - Virtual impedance

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U2 - 10.1109/ITEC-AP.2017.8080886

DO - 10.1109/ITEC-AP.2017.8080886

M3 - 会议稿件

AN - SCOPUS:85040107978

T3 - 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

BT - 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

Y2 - 7 August 2017 through 10 August 2017

ER -

Wei W, Pengfei L, Fen L, Guihua L. An improved voltage support strategy of grid-connected inverter under unbalanced grid condition. In 2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017. Institute of Electrical and Electronics Engineers Inc. 2017. 8080886. (2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017). doi: 10.1109/ITEC-AP.2017.8080886

An improved voltage support strategy of grid-connected inverter under unbalanced grid condition

Abstract

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UN SDGs

Keywords

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