DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dynamic Microgrids With Self-Organized Grid-Forming Inverters in Unbalanced Distribution Feeders

Abstract

In contrast to conventional static microgrids (MGs), MGs with dynamic and adjustable territories (i.e., dynamic MGs) are proposed and implemented in this paper. Dynamic MGs are commonly dominated by grid-forming inverters and nested in unbalanced distribution feeders. Unlike balanced systems where only positive-sequence components exist, proper operation of unbalanced dynamic MGs presents additional challenges. A distributed secondary control strategy is developed in this study for distributed generators (DGs) interfaced with gridforming inverters in unbalanced dynamic MGs by providing coordinated regulations on both positive- and negative-sequence system models. System frequency and voltage are under constant regulation, along with voltage unbalance (VU) management for multiple critical load buses (CLB). The proposed control strategy enables seamless system transition during unbalanced dynamic MGs reconfiguration, and guarantees proportional positive- and negative-sequence power sharing among connected DGs with respect to system topology variation. Detailed controller designs are provided and stability analyses are derived. The proposed control strategy is fully implemented in hardware controllers and validated on a Hardware-in-the-Loop (HIL) MG testbed.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [1]
  1. North Carolina State Univ., Raleigh, NC (United States)
  2. Temple Univ., Philadelphia, PA (United States)
  3. Southern Methodist Univ., Dallas, TX (United States)
Publication Date:
Research Org.:
Vanderbilt Univ., Nashville, TN (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
OSTI Identifier:
1567173
Report Number(s):
DOE-VANDERBILT-0000666-29
Journal ID: ISSN 2168-6777
Grant/Contract Number:  
AR0000666; 34230
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Journal of Emerging and Selected Topics in Power Electronics
Additional Journal Information:
Journal Volume: 8; Journal Issue: 2; Journal ID: ISSN 2168-6777
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 42 ENGINEERING; distributed control; dynamic microgrids; network reconfiguration; secondary control; unbalanced system; RIAPS

Citation Formats

Du, Yuhua, Lu, Xiaonan, Tu, Hao, Wang, Jianhui, and Lukic, Srdjan. Dynamic Microgrids With Self-Organized Grid-Forming Inverters in Unbalanced Distribution Feeders. United States: N. p., 2019. Web. doi:10.1109/jestpe.2019.2936741.
Du, Yuhua, Lu, Xiaonan, Tu, Hao, Wang, Jianhui, & Lukic, Srdjan. Dynamic Microgrids With Self-Organized Grid-Forming Inverters in Unbalanced Distribution Feeders. United States. https://doi.org/10.1109/jestpe.2019.2936741
Du, Yuhua, Lu, Xiaonan, Tu, Hao, Wang, Jianhui, and Lukic, Srdjan. Wed . "Dynamic Microgrids With Self-Organized Grid-Forming Inverters in Unbalanced Distribution Feeders". United States. https://doi.org/10.1109/jestpe.2019.2936741. https://www.osti.gov/servlets/purl/1567173.
@article{osti_1567173,
title = {Dynamic Microgrids With Self-Organized Grid-Forming Inverters in Unbalanced Distribution Feeders},
author = {Du, Yuhua and Lu, Xiaonan and Tu, Hao and Wang, Jianhui and Lukic, Srdjan},
abstractNote = {In contrast to conventional static microgrids (MGs), MGs with dynamic and adjustable territories (i.e., dynamic MGs) are proposed and implemented in this paper. Dynamic MGs are commonly dominated by grid-forming inverters and nested in unbalanced distribution feeders. Unlike balanced systems where only positive-sequence components exist, proper operation of unbalanced dynamic MGs presents additional challenges. A distributed secondary control strategy is developed in this study for distributed generators (DGs) interfaced with gridforming inverters in unbalanced dynamic MGs by providing coordinated regulations on both positive- and negative-sequence system models. System frequency and voltage are under constant regulation, along with voltage unbalance (VU) management for multiple critical load buses (CLB). The proposed control strategy enables seamless system transition during unbalanced dynamic MGs reconfiguration, and guarantees proportional positive- and negative-sequence power sharing among connected DGs with respect to system topology variation. Detailed controller designs are provided and stability analyses are derived. The proposed control strategy is fully implemented in hardware controllers and validated on a Hardware-in-the-Loop (HIL) MG testbed.},
doi = {10.1109/jestpe.2019.2936741},
journal = {IEEE Journal of Emerging and Selected Topics in Power Electronics},
number = 2,
volume = 8,
place = {United States},
year = {Wed Aug 21 00:00:00 EDT 2019},
month = {Wed Aug 21 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

Save / Share: