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Equivalent-Circuit Models of Grid-Forming IBRs for Electromagnetic-Transient Simulations

Conference ·
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We derive equivalent-circuit models of control- and physical-layer subsystems of grid-forming (GFM) inverter-based resources (IBRs) for electromagnetic-transient (EMT) simulations. Three different primary controllers are considered: Droop, Virtual Synchronous Machine (VSM), and dispatchable Virtual Oscillator Control (dVOC). In addition, the models include cascaded voltage- and current-control loops, and LCL output filters. Simulations for a single-inverter setup and for a network of five inverters in a modified IEEE 14-bus topology are presented. The equivalent-circuit models simulated with analog electronic circuit-simulator software (in our case, LTspice) offer the same accuracy, and with no explicit tuning of the solver, lower computational burden compared to block-diagram-based implementations in commercial off-the-shelf EMT software (in our case, MATLAB-Simulink).
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program
DOE Contract Number:
AC36-08GO28308; AC36-08GO28308
OSTI ID:
2477032
Report Number(s):
NREL/CP-5D00-92004; MainId:93782; UUID:9651401e-d052-4bc3-8df2-da3fda10906a; MainAdminId:74202
Country of Publication:
United States
Language:
English

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Related Subjects

POWER TRANSMISSION AND DISTRIBUTION
electromagnetic transient simulation
equivalent-circuit models
grid-forming inverters