Droop Control-Based Dispatch of an Islanded Microgrid With Multiple Grid-Forming Sources

Conference · Fri Oct 20 04:00:00 EDT 2023

OSTI ID:2203645

Ganguly, Subhankar; Wang, Jing; Shirazi, Mariko; Kroposki, Benjamin

Before rotating, fossil fuel-based, synchronous generators (SGs) are phased out, in line with renewable generation goals, grid-forming (GFM) inverters are expected to parallel SGs. Primary droop control allows GFM inverters to share power without communication; however, it is necessary to dispatch GFM inverters and/or SGs with the desired output power for better energy management (e.g., one GFM inverter needs to charge the battery due to a low state of charge). Therefore, this paper develops an analytic approach to dispatching GFM inverters and SGs with the desired output power by shifting the droop intercept up/down while maintaining the same frequency operating point for improved transient stability. This concept is demonstrated through a pure hardware setup with two off-the-shelf inverters and one diesel generator under an islanded microgrid, and we provide insight on the real-world implementation of the proposed concept.

• 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
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 2203645
• Report Number(s): NREL/PR-5D00-87773; MainId:88548; UUID:b161d871-6fe1-480a-bbb2-7dba1441f41d; MainAdminID:70916
• Country of Publication: United States
• Language: English

Related Subjects

POWER TRANSMISSION AND DISTRIBUTION
droop control
grid-following control
grid-forming control
microgrid