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On the Low Risk of Subsynchronous Resonance (SSR) in Type III Wind Turbines Operating in Grid-Forming Control

Conference ·
OSTI ID:1958280
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We have shown in a previous work that the risk of sub-synchronous resonance (SSR) between a wind power plant with Type III wind turbines and series-compensated transmission lines is low when the wind turbines in the plant are operated in grid-forming mode, instead of the standard grid-following mode. The fundamental mechanism behind the improved damping characteristics is explained in this paper by modeling the positive and negative sequence impedances of Type III wind turbines for GFM operation mode. It is discovered that the GFM control naturally acts against the negative resistance of Type III wind turbines that results from an interaction between the proportional gain of the rotor-side converter current controller and negative slip. The developed sequence impedance models and improved damping behavior are verified using PSCAD simulations of a 2.5-MW Type III GFM wind turbine. The modeling predictions are also supported by experimentally measuring the sequence impedance response of a 2.5-MW Type III wind turbine during operation in GFL and GFM modes.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind Energy Technologies Office (EE-4W)
DOE Contract Number:
AC36-08GO28308;
OSTI ID:
1958280
Report Number(s):
NREL/PR-5D00-84326; MainId:85099; UUID:566d7043-7b0e-48f6-9efb-290db84c5832; MainAdminID:68795
Conference Information:
Presented at the 21st Wind & Solar Integration Workshop, 12-14 October 2022, Zuid-Holland, Netherlands
Country of Publication:
United States
Language:
English

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Related Subjects

grid-following turbine
grid-forming turbine
impedance modeling
POWER TRANSMISSION AND DISTRIBUTION
WIND ENERGY
stability
sub-synchronous resonance