Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators

Holger Jedtberg; Marius Langwasser; Rongwu Zhu; Giampaolo Buticchi; Thomas Ebel; Marco Liserre

doi:10.1109/APEC.2017.7930790

Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators

Holger Jedtberg
, Marius Langwasser
, Rongwu Zhu
, Giampaolo Buticchi
, Thomas Ebel
, Marco Liserre

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

8 Citations (Scopus)

Abstract

DC-link capacitors are one of the components which fail the most in back-to-back converters (B2B) of wind turbine systems (WTS) with doubly-fed induction generators (DFIG). Due to its frequency and temperature dependent equivalent series resistance (ESR) additional low frequency current components, which have not been considered during the design stage of the converter, can cause significant additional losses which in turn lead to a decreasing lifetime of the capacitor. Unbalanced grid voltages in WTS with DFIG lead to low frequency components in the capacitor current's spectrum, which are caused by components from the grid-side converter as well as from the rotor-side converter because of the direct connection of the DFIG's stator to the grid. Therefore, in this paper, the study of impacts of unbalanced grid voltages on the hotspot temperature of DC-link capacitors in WTS with DFIG is proposed. A small scale laboratory demonstrator is presented and the measurement results are in accordance with the expectations based on analytical and simulations findings.

Original language	English
Title of host publication	2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	816-823
Number of pages	8
ISBN (Electronic)	9781509053667
DOIs	https://doi.org/10.1109/APEC.2017.7930790
Publication status	Published - 17 May 2017
Externally published	Yes
Event	32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 - Tampa, United States Duration: 26 Mar 2017 → 30 Mar 2017

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Conference

Conference	32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
Country/Territory	United States
City	Tampa
Period	26/03/17 → 30/03/17

UN SDGs

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

SDG 7 Affordable and Clean Energy

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/APEC.2017.7930790

Cite this

Jedtberg, H., Langwasser, M., Zhu, R., Buticchi, G., Ebel, T., & Liserre, M. (2017). Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators. In 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017 (pp. 816-823). Article 7930790 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2017.7930790

Jedtberg, Holger ; Langwasser, Marius ; Zhu, Rongwu et al. / Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators. 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 816-823 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

@inproceedings{495aab50ef774b21ba125b5e9c44ef97,

title = "Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators",

abstract = "DC-link capacitors are one of the components which fail the most in back-to-back converters (B2B) of wind turbine systems (WTS) with doubly-fed induction generators (DFIG). Due to its frequency and temperature dependent equivalent series resistance (ESR) additional low frequency current components, which have not been considered during the design stage of the converter, can cause significant additional losses which in turn lead to a decreasing lifetime of the capacitor. Unbalanced grid voltages in WTS with DFIG lead to low frequency components in the capacitor current's spectrum, which are caused by components from the grid-side converter as well as from the rotor-side converter because of the direct connection of the DFIG's stator to the grid. Therefore, in this paper, the study of impacts of unbalanced grid voltages on the hotspot temperature of DC-link capacitors in WTS with DFIG is proposed. A small scale laboratory demonstrator is presented and the measurement results are in accordance with the expectations based on analytical and simulations findings.",

author = "Holger Jedtberg and Marius Langwasser and Rongwu Zhu and Giampaolo Buticchi and Thomas Ebel and Marco Liserre",

note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 ; Conference date: 26-03-2017 Through 30-03-2017",

year = "2017",

month = may,

day = "17",

doi = "10.1109/APEC.2017.7930790",

language = "English",

series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",

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

pages = "816--823",

booktitle = "2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017",

address = "United States",

}

Jedtberg, H, Langwasser, M, Zhu, R, Buticchi, G, Ebel, T & Liserre, M 2017, Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators. in 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017., 7930790, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, Institute of Electrical and Electronics Engineers Inc., pp. 816-823, 32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017, Tampa, United States, 26/03/17. https://doi.org/10.1109/APEC.2017.7930790

Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators. / Jedtberg, Holger; Langwasser, Marius; Zhu, Rongwu et al.
2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 816-823 7930790 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

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

TY - GEN

T1 - Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators

AU - Jedtberg, Holger

AU - Langwasser, Marius

AU - Zhu, Rongwu

AU - Buticchi, Giampaolo

AU - Ebel, Thomas

AU - Liserre, Marco

PY - 2017/5/17

Y1 - 2017/5/17

N2 - DC-link capacitors are one of the components which fail the most in back-to-back converters (B2B) of wind turbine systems (WTS) with doubly-fed induction generators (DFIG). Due to its frequency and temperature dependent equivalent series resistance (ESR) additional low frequency current components, which have not been considered during the design stage of the converter, can cause significant additional losses which in turn lead to a decreasing lifetime of the capacitor. Unbalanced grid voltages in WTS with DFIG lead to low frequency components in the capacitor current's spectrum, which are caused by components from the grid-side converter as well as from the rotor-side converter because of the direct connection of the DFIG's stator to the grid. Therefore, in this paper, the study of impacts of unbalanced grid voltages on the hotspot temperature of DC-link capacitors in WTS with DFIG is proposed. A small scale laboratory demonstrator is presented and the measurement results are in accordance with the expectations based on analytical and simulations findings.

AB - DC-link capacitors are one of the components which fail the most in back-to-back converters (B2B) of wind turbine systems (WTS) with doubly-fed induction generators (DFIG). Due to its frequency and temperature dependent equivalent series resistance (ESR) additional low frequency current components, which have not been considered during the design stage of the converter, can cause significant additional losses which in turn lead to a decreasing lifetime of the capacitor. Unbalanced grid voltages in WTS with DFIG lead to low frequency components in the capacitor current's spectrum, which are caused by components from the grid-side converter as well as from the rotor-side converter because of the direct connection of the DFIG's stator to the grid. Therefore, in this paper, the study of impacts of unbalanced grid voltages on the hotspot temperature of DC-link capacitors in WTS with DFIG is proposed. A small scale laboratory demonstrator is presented and the measurement results are in accordance with the expectations based on analytical and simulations findings.

UR - https://www.scopus.com/pages/publications/85020014011

U2 - 10.1109/APEC.2017.7930790

DO - 10.1109/APEC.2017.7930790

M3 - Conference contribution

AN - SCOPUS:85020014011

T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

SP - 816

EP - 823

BT - 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017

Y2 - 26 March 2017 through 30 March 2017

ER -

Jedtberg H, Langwasser M, Zhu R, Buticchi G, Ebel T, Liserre M. Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators. In 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017. Institute of Electrical and Electronics Engineers Inc. 2017. p. 816-823. 7930790. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). doi: 10.1109/APEC.2017.7930790

Impacts of unbalanced grid voltages on lifetime of DC-link capacitors of back-to-back converters in wind turbines with doubly-fed induction generators

Abstract

Publication series

Conference

UN SDGs

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this