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Study of Inverter Control Strategies on the Stability of Microgrids Toward 100% Renewable Penetration: Preprint

Conference ·
OSTI ID:1881911
This paper investigates microgrid transient stability with mixed generation - synchronous generator (SG), grid-forming (GFM) and grid-following (GFL) inverters - under increasing penetration levels toward a 100% renewable generation microgrid. Specifically, the dynamics of a microgrid with an SG and GFL inverter(s), an SG with GFM inverter(s), and an SG with GFM and GFL inverters under each penetration are evaluated with an electromagnetic transient study with two critical dynamic events: unplanned islanding and switching in a pumped induction motor load. Analysis and simulation results indicate that the microgrid with GFL inverters running in parallel with the SG can provide a faster power response than the GFM inverters to compensate for the deviations of the frequency and voltage. The scenario with the mixed SG, GFM, and GFL inverter has the best transient and steady-state stability toward 100% inverter-based resource (IBR) penetration. This comprehensive study provides helpful references for microgrid engineers to understand the microgrid stability when facing various choice of installing IBRs (GFL, GFM, or mixed).
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program
DOE Contract Number:
AC36-08GO28308;
OSTI ID:
1881911
Report Number(s):
NREL/CP-5D00-82911; MainId:83684; UUID:c508b554-5a65-4667-a02c-dc559ab2d4ec; MainAdminID:65100
Conference Information:
Presented at the 48th Annual Conference of the IEEE Industrial Electronics Society (IECON), 17-22 October 2022, Brussels, Belgium
Country of Publication:
United States
Language:
English

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Related Subjects

droop control
grid-following control
grid-forming control
POWER TRANSMISSION AND DISTRIBUTION
voltage and frequency stability