Enhancing Frequency Stability of Weak Grids with Modified Distributed Virtual Inertia Method

Meysam Saeedian, Bahram Pournazarian, Bahman Eskandari, Mahdi Shahparasti, Edris Pouresmaeil*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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Abstract

In small–scale power systems, distributed virtual inertia (DVI)–based converters can effectively participate in primary frequency regulation. In this method, the synthetic inertia provision is fulfilled by discharging the preserved energy of dc–side capacitors employed in grid–interactive converters. Nevertheless, the eigenvalue analyses provided by small–signal state–space model of the converter reveal that the DVI function induces instability to the converter operating in weak grid connection. To address this issue aimed at improving grid frequency stability during frequency events, a new compensator is presented in this work. The compensator is designed so as eliminates the negative effect of DVI regulator on system stability. The effectiveness of proposed approach is illustrated by the time–domain simulations in MATLAB. The results show that the frequency rate of change following a frequency perturbation is enhanced by 40.38% compared with the scenario in which the synthetic inertia functionality is nullified.
Original languageEnglish
Title of host publicationProceedings of the 11th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2020
PublisherIEEE
Pages187-192
Number of pages6
ISBN (Electronic)978-1-7281-6990-3
DOIs
Publication statusPublished - 2020
MoE publication typeA4 Article in a conference publication
EventIEEE International Symposium on Power Electronics for Distributed Generation Systems - Virtual, Online
Duration: 28 Sep 20201 Oct 2020
Conference number: 11

Publication series

NameIEEE International Symposium on Power Electronics for Distributed Generation Systems
PublisherIEEE
ISSN (Print)2329-5759
ISSN (Electronic)2329-5767

Conference

ConferenceIEEE International Symposium on Power Electronics for Distributed Generation Systems
Abbreviated titlePEDG
CityVirtual, Online
Period28/09/202001/10/2020
OtherVirtual conference

Keywords

  • Grid - following voltage source converter
  • VSC
  • Synthetic inertia
  • Frequency regulation
  • renewable energy source
  • RES

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