NDLI: Response of a grid forming wind farm to system events, and the impact of external and internal damping

Content Provider	IET Digital Library
Author	Roscoe, Andrew Knueppel, Thyge Silva, Ricardo Da Brogan, Paul Gutierrez, Isaac Elliott, Douglas Campion, Juan Carlos Perez
Abstract	Following from smaller-scale investigations of grid-forming converter control applied to wind turbines in 2017–2018, this study describes a much larger trial involving an entire wind farm, owned and operated by ScottishPower Renewables. To the authors’ knowledge, this was the first UK converter-connected wind farm to operate in grid-forming mode, and the largest in the world to date. The 23-turbine, 69 MW farm ran in the grid-forming mode for 6 weeks, exploring inertia contributions between H = 0.2 s and H = 8 s. A number of unscheduled frequency disturbances occurred due to interconnector, combined cycle gas turbine (CCGT) and other trips, to which un-curtailed turbines were able to respond. In addition, several deliberate tests were carried out. The turbines were able to provide a stable and appropriate response at relatively high inertia levels to the frequency events commonly occurring today. The captured responses stimulated a debate as to whether external damping power might be required in a grid-forming converter, or whether internal damping is sufficient to allow stable and robust power-sharing with parallel devices in all grid event scenarios. Analysis in this study suggests that, practically, internal damping is probably appropriate, and that any deficiency in external damping power can be more than mitigated by reactance and/or droop-slope response-time management in the grid-forming converters.
Starting Page	3908
Ending Page	3917
Page Count	10
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 19, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2020.0638
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/19
Journal	IET Renewable Power Generation
Publisher Date	2021-02-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	CCGT Interconnector Control of Electric Power System Damping Droop-slope Response-time Management External Damping Power Grid Event Scenario Grid Forming Wind Farm Grid-forming Converter Grid-forming Converter Control Grid-forming Mode High Inertia Levels Internal Damping Power 69.0 MW Power Converter Power Electronics Power Generation Control Power Generation Economics Power Grid Power Supplies to Apparatus Power Supply Power System Control Power System Economics Power System Interconnection Power System Managemen Power System Operation Robust Power-sharing ScottishPower Renewables Smaller-scale Investigations Supervisory Circuit Time 0.2 S to 8 S Time 6.0 Week UK Converter-connected Wind Farm Uncurtailed Turbines Unscheduled Frequency Disturbances Wind Power Plant Wind Turbine
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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