CGI for Impedance Characterization of Inverter-Coupled Generation
This presentation provides an overview of impedance characterization of inverter-coupled generation using the 7 MVA/13.2 kV grid simulator (controllable grid interface) at the National Wind Technology Center of NREL. The presentation shows how sequence impedance responses of multi-megawatt inverters and wind turbines are measured using the grid simulator. Applications of the measured impedance responses for the evaluation of dynamic interactions and high-fidelity model validation are demonstrated. The presentation also shows application of large-signal impedance theory for the prediction of harmonics generated by subsynchronous resonance (SSR) of DFIG-based Type-III wind turbines with series-compensated transmission lines. Finally, a new method for impedance-based characterization of power system frequency response is presented to enable real-time estimation of system inertia and primary frequency response (PFR), and to support control design for frequency support by inverter-coupled generation.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)
- DOE Contract Number:
- DE-AC36-08GO28308
- OSTI ID:
- 1493869
- Report Number(s):
- NREL/PR-5D00-72899; MainId:21474; UUID:be873fb3-f9f7-e811-9c1a-ac162d87dfe5; MainAdminID:9950
- Resource Relation:
- Conference: Presented at the Fifth International Workshop on Grid Simulator Testing, 14-15 November 2018, Tallahassee, Florida
- Country of Publication:
- United States
- Language:
- English
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