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Grid-forming requirements based on stability assessment for 100% converter-based Irish power system
Date Issued
2021-01-01
Date Available
2022-08-22T11:10:56Z
Abstract
The fault response of a 100% converter-based system can be significantly different to that of a synchronous generator-based system, considering the lower capacity headroom, but flexible control capability, of power electronic converters. The system response is investigated for an Irish grid under balanced three-phase faults comprising of 100% converter-based generation: grid-forming (GF) and grid-following (GL). Electro-magnetic transient (EMT) simulations show that a system consisting only of GF converters (all droop control, all dispatchable virtual oscillator control, or a mix of both) is robust against three-phase faults, with little variation in performance, despite the fault location or choice of GF control methods. However, the rating and location of GF converters are critical to operating the grid securely in the presence of both GF and GL converters. Assuming that individual converter bus nodes are either GF or GL, a minimum GF requirement (by capacity) is found to be 37–40%, with these GF converters located close to the major load centres. Assuming instead that individual generation nodes consist of a mix of GF and GL converters, it is found that the GF requirement can be relaxed by 8–10%.
Sponsorship
European Commission Horizon 2020
Science Foundation Ireland
Type of Material
Journal Article
Publisher
Wiley
Journal
IET Renewable Power Generation
Volume
16
Issue
3
Start Page
447
End Page
458
Copyright (Published Version)
2021 the Authors
Language
English
Status of Item
Peer reviewed
ISSN
1752-1416
This item is made available under a Creative Commons License
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RPG Journal - Stability assessment with 100 pc converters_clean_2021.10.12.docx
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1.51 MB
Format
Owning collection
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