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Modeling Adequacy of Droop-Controlled Grid-Forming Converters for Transient Studies: Singular Perturbation Analysis

Conference ·
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The converter-interfaced generation (CIGs) are expected to dominate the grid of the future. These CIGs will cohabit with a small percentage of synchronous generators (SGs) producing power from hydro, solar thermal or even nuclear resources. It appears that the literature lacks comprehensive modeling adequacy studies on such grids with SGs and CIGs. This paper takes the first step in that direction. To that end, a nonlinear averaged phasor model of the system with detailed model of the converters including grid-forming converters (GFCs) and their control is developed. Then a singular perturbation analysis based model reduction approach for such system is proposed. Based on the proposed method, two levels of reduced order models for the GFCs are derived. Finally, the adequacy of these reduced-order models are presented via time-domain simulations on two test system models using MATLAB/Simulink.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Electricity Delivery and Energy Reliability (OE), Power Systems Engineering Research and Development (OE-10)
DOE Contract Number:
SC0012704
OSTI ID:
1992864
Report Number(s):
BNL-224607-2023-COPA
Country of Publication:
United States
Language:
English

References (9)

Foundations and Challenges of Low-Inertia Systems (Invited Paper) conference June 2018
Improvement of Transient Response in Microgrids Using Virtual Inertia journal July 2013
Synchronization and transient stability in power networks and non-uniform Kuramoto oscillators conference June 2010
Grid of Near Future: Impact on (N-1) Contingency Analysis in Presence of Droop-Controlled Grid-Forming Converter-Interfaced Generations conference July 2022
Western Wind and Solar Integration Study Phase 3 – Frequency Response and Transient Stability report December 2014
A framework for development of universal rules for microgrids stability and control conference December 2017
Control of low-inertia power grids: A model reduction approach conference December 2017
Singular Perturbation and Small-Signal Stability for Inverter Networks journal June 2022
Nonlinear Lyapunov Stability Analysis of Seven Models of a DC/AC Droop Controlled Inverter Connected to an Infinite Bus journal January 2019

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