Instability of Grid Connected Converter under Weak AC Grid Conditions

Xinyue Zhang; Chen Liu; Rui Ma; Hao Bai; Franck Gechter; Fei Gao

doi:10.1109/ITEC.2019.8790470

Instability of Grid Connected Converter under Weak AC Grid Conditions

Xinyue Zhang
, Chen Liu
, Rui Ma
, Hao Bai
, Franck Gechter
, Fei Gao

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

4 Scopus citations

Abstract

Renewable energy sources like wind or hydrogen have been worked as a reliable option to traditional power sources. But for distributed power generation systems (DPGSs), the operation of the grid-connected converter under the weak ac grid condition has been a challenge for the stability and power quality issues. This paper shows the effect of the weak grid on the grid voltage-controlled inverters with LCL- filter and L- filter. The impedance-based analytical approach is employed to study the harmonic stability caused by the interaction between the power grid and the grid converter. A method of deriving the impedance ratios for different inverters is utilized to predict the harmonic stability of the power system through Nyquist diagrams and Bode plot. Time-domain simulations based on Matlab/Simulink are presented to validate the effectiveness of the theoretical approach and confirm conclusions from analytical studies. This study provides insight into the design of the controller under weak grid networks.

Original language	English
Title of host publication	ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538693100
DOIs	https://doi.org/10.1109/ITEC.2019.8790470
State	Published - Jun 2019
Externally published	Yes
Event	2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019 - Novi, United States Duration: 19 Jun 2019 → 21 Jun 2019

Publication series

Name	ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo

Conference

Conference	2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019
Country/Territory	United States
City	Novi
Period	19/06/19 → 21/06/19

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Grid Converter
LCL- filter and L- filter
impdedance ratio
stability analysis
weak grid

Access to Document

10.1109/ITEC.2019.8790470

Cite this

Zhang, X., Liu, C., Ma, R., Bai, H., Gechter, F., & Gao, F. (2019). Instability of Grid Connected Converter under Weak AC Grid Conditions. In ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo Article 8790470 (ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ITEC.2019.8790470

@inproceedings{7f030d7e621243e292aa95cbf409c92b,

title = "Instability of Grid Connected Converter under Weak AC Grid Conditions",

abstract = "Renewable energy sources like wind or hydrogen have been worked as a reliable option to traditional power sources. But for distributed power generation systems (DPGSs), the operation of the grid-connected converter under the weak ac grid condition has been a challenge for the stability and power quality issues. This paper shows the effect of the weak grid on the grid voltage-controlled inverters with LCL- filter and L- filter. The impedance-based analytical approach is employed to study the harmonic stability caused by the interaction between the power grid and the grid converter. A method of deriving the impedance ratios for different inverters is utilized to predict the harmonic stability of the power system through Nyquist diagrams and Bode plot. Time-domain simulations based on Matlab/Simulink are presented to validate the effectiveness of the theoretical approach and confirm conclusions from analytical studies. This study provides insight into the design of the controller under weak grid networks.",

keywords = "Grid Converter, LCL- filter and L- filter, impdedance ratio, stability analysis, weak grid",

author = "Xinyue Zhang and Chen Liu and Rui Ma and Hao Bai and Franck Gechter and Fei Gao",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019 ; Conference date: 19-06-2019 Through 21-06-2019",

year = "2019",

month = jun,

doi = "10.1109/ITEC.2019.8790470",

language = "英语",

series = "ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo",

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Zhang, X, Liu, C, Ma, R , Bai, H, Gechter, F & Gao, F 2019, Instability of Grid Connected Converter under Weak AC Grid Conditions. in ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo., 8790470, ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo, Institute of Electrical and Electronics Engineers Inc., 2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019, Novi, United States, 19/06/19. https://doi.org/10.1109/ITEC.2019.8790470

Instability of Grid Connected Converter under Weak AC Grid Conditions. / Zhang, Xinyue; Liu, Chen; Ma, Rui et al.
ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo. Institute of Electrical and Electronics Engineers Inc., 2019. 8790470 (ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo).

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

TY - GEN

T1 - Instability of Grid Connected Converter under Weak AC Grid Conditions

AU - Zhang, Xinyue

AU - Liu, Chen

AU - Ma, Rui

AU - Bai, Hao

AU - Gechter, Franck

AU - Gao, Fei

PY - 2019/6

Y1 - 2019/6

N2 - Renewable energy sources like wind or hydrogen have been worked as a reliable option to traditional power sources. But for distributed power generation systems (DPGSs), the operation of the grid-connected converter under the weak ac grid condition has been a challenge for the stability and power quality issues. This paper shows the effect of the weak grid on the grid voltage-controlled inverters with LCL- filter and L- filter. The impedance-based analytical approach is employed to study the harmonic stability caused by the interaction between the power grid and the grid converter. A method of deriving the impedance ratios for different inverters is utilized to predict the harmonic stability of the power system through Nyquist diagrams and Bode plot. Time-domain simulations based on Matlab/Simulink are presented to validate the effectiveness of the theoretical approach and confirm conclusions from analytical studies. This study provides insight into the design of the controller under weak grid networks.

AB - Renewable energy sources like wind or hydrogen have been worked as a reliable option to traditional power sources. But for distributed power generation systems (DPGSs), the operation of the grid-connected converter under the weak ac grid condition has been a challenge for the stability and power quality issues. This paper shows the effect of the weak grid on the grid voltage-controlled inverters with LCL- filter and L- filter. The impedance-based analytical approach is employed to study the harmonic stability caused by the interaction between the power grid and the grid converter. A method of deriving the impedance ratios for different inverters is utilized to predict the harmonic stability of the power system through Nyquist diagrams and Bode plot. Time-domain simulations based on Matlab/Simulink are presented to validate the effectiveness of the theoretical approach and confirm conclusions from analytical studies. This study provides insight into the design of the controller under weak grid networks.

KW - Grid Converter

KW - LCL- filter and L- filter

KW - impdedance ratio

KW - stability analysis

KW - weak grid

UR - https://www.scopus.com/pages/publications/85071295022

U2 - 10.1109/ITEC.2019.8790470

DO - 10.1109/ITEC.2019.8790470

M3 - 会议稿件

AN - SCOPUS:85071295022

T3 - ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo

BT - ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2019 IEEE Transportation Electrification Conference and Expo, ITEC 2019

Y2 - 19 June 2019 through 21 June 2019

ER -

Zhang X, Liu C, Ma R , Bai H, Gechter F, Gao F. Instability of Grid Connected Converter under Weak AC Grid Conditions. In ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo. Institute of Electrical and Electronics Engineers Inc. 2019. 8790470. (ITEC 2019 - 2019 IEEE Transportation Electrification Conference and Expo). doi: 10.1109/ITEC.2019.8790470

Instability of Grid Connected Converter under Weak AC Grid Conditions

Abstract

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UN SDGs

Keywords

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