Virtual Negative Cable Resistance for Power Sharing Accuracy Enhancement in DC Microgrids

Fulong Li, Zhengyu Lin, Jiande Wu, Wuhua Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposed a secondary control method for power sharing accuracy enhancement and bus voltage restoration in DC microgrids. Droop control is notorious for its low power sharing accuracy when the cable resistance is considered. The virtual negative cable resistance (VNCR) concept is proposed compensate the cable resistance, therefore, it no longer has negative impact on the power sharing accuracy. The VNCR controller needs to monitor the DC bus voltage through low bandwidth communications. As the byproduct, the DC bus voltage restoration can be achieved simultaneously. The control signals are processed through low-pass filters, so the secondary control layer can be decoupled from the primary current/voltage controls over high frequency dynamics. Finally, the proposed VNCR method is validated through MATLAB simulation.
Original languageEnglish
Title of host publicationProceedings - 2019 IEEE 28th International Symposium on Industrial Electronics, ISIE 2019
PublisherIEEE
Pages2539-2544
Number of pages6
Volume2019-June
ISBN (Electronic)978-1-7281-3666-0
ISBN (Print)978-1-7281-3667-7
DOIs
Publication statusPublished - 1 Jun 2019
Event2019 IEEE 28th International Symposium on Industrial Electronics (ISIE) - Vancouver, BC, Canada
Duration: 12 Jun 201914 Jun 2019

Publication series

Name2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)
PublisherIEEE
ISSN (Print)2163-5137
ISSN (Electronic)2163-5145

Conference

Conference2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)
Period12/06/1914/06/19

Fingerprint

Cables
Restoration
Electric potential
Low pass filters
Electric current control
Voltage control
MATLAB
Byproducts
Bandwidth
Controllers
Communication

Bibliographical note

Funding: U.K. EPSRC UKRI Innovation Fellowship scheme under grant No. EP/S001662/1, and the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 734796.

Keywords

  • DC microgrids
  • bus voltage restoration
  • current sharing accuracy
  • droop control
  • low pass filter

Cite this

Li, F., Lin, Z., Wu, J., & Li, W. (2019). Virtual Negative Cable Resistance for Power Sharing Accuracy Enhancement in DC Microgrids. In Proceedings - 2019 IEEE 28th International Symposium on Industrial Electronics, ISIE 2019 (Vol. 2019-June, pp. 2539-2544). [8781426] (2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)). IEEE. https://doi.org/10.1109/ISIE.2019.8781426
Li, Fulong ; Lin, Zhengyu ; Wu, Jiande ; Li, Wuhua. / Virtual Negative Cable Resistance for Power Sharing Accuracy Enhancement in DC Microgrids. Proceedings - 2019 IEEE 28th International Symposium on Industrial Electronics, ISIE 2019. Vol. 2019-June IEEE, 2019. pp. 2539-2544 (2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)).
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abstract = "This paper proposed a secondary control method for power sharing accuracy enhancement and bus voltage restoration in DC microgrids. Droop control is notorious for its low power sharing accuracy when the cable resistance is considered. The virtual negative cable resistance (VNCR) concept is proposed compensate the cable resistance, therefore, it no longer has negative impact on the power sharing accuracy. The VNCR controller needs to monitor the DC bus voltage through low bandwidth communications. As the byproduct, the DC bus voltage restoration can be achieved simultaneously. The control signals are processed through low-pass filters, so the secondary control layer can be decoupled from the primary current/voltage controls over high frequency dynamics. Finally, the proposed VNCR method is validated through MATLAB simulation.",
keywords = "DC microgrids, bus voltage restoration, current sharing accuracy, droop control, low pass filter",
author = "Fulong Li and Zhengyu Lin and Jiande Wu and Wuhua Li",
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Li, F, Lin, Z, Wu, J & Li, W 2019, Virtual Negative Cable Resistance for Power Sharing Accuracy Enhancement in DC Microgrids. in Proceedings - 2019 IEEE 28th International Symposium on Industrial Electronics, ISIE 2019. vol. 2019-June, 8781426, 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE), IEEE, pp. 2539-2544, 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE), 12/06/19. https://doi.org/10.1109/ISIE.2019.8781426

Virtual Negative Cable Resistance for Power Sharing Accuracy Enhancement in DC Microgrids. / Li, Fulong; Lin, Zhengyu; Wu, Jiande; Li, Wuhua.

Proceedings - 2019 IEEE 28th International Symposium on Industrial Electronics, ISIE 2019. Vol. 2019-June IEEE, 2019. p. 2539-2544 8781426 (2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - This paper proposed a secondary control method for power sharing accuracy enhancement and bus voltage restoration in DC microgrids. Droop control is notorious for its low power sharing accuracy when the cable resistance is considered. The virtual negative cable resistance (VNCR) concept is proposed compensate the cable resistance, therefore, it no longer has negative impact on the power sharing accuracy. The VNCR controller needs to monitor the DC bus voltage through low bandwidth communications. As the byproduct, the DC bus voltage restoration can be achieved simultaneously. The control signals are processed through low-pass filters, so the secondary control layer can be decoupled from the primary current/voltage controls over high frequency dynamics. Finally, the proposed VNCR method is validated through MATLAB simulation.

AB - This paper proposed a secondary control method for power sharing accuracy enhancement and bus voltage restoration in DC microgrids. Droop control is notorious for its low power sharing accuracy when the cable resistance is considered. The virtual negative cable resistance (VNCR) concept is proposed compensate the cable resistance, therefore, it no longer has negative impact on the power sharing accuracy. The VNCR controller needs to monitor the DC bus voltage through low bandwidth communications. As the byproduct, the DC bus voltage restoration can be achieved simultaneously. The control signals are processed through low-pass filters, so the secondary control layer can be decoupled from the primary current/voltage controls over high frequency dynamics. Finally, the proposed VNCR method is validated through MATLAB simulation.

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Li F, Lin Z, Wu J, Li W. Virtual Negative Cable Resistance for Power Sharing Accuracy Enhancement in DC Microgrids. In Proceedings - 2019 IEEE 28th International Symposium on Industrial Electronics, ISIE 2019. Vol. 2019-June. IEEE. 2019. p. 2539-2544. 8781426. (2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)). https://doi.org/10.1109/ISIE.2019.8781426