Abstract
Several studies have been conducted to investigate the interaction dynamics of direct current (dc) microgrids supplying tightly regulated converters, which behave as constant power loads (CPLs). However, the presence of loads with open-loop control or of small closed-loop bandwidth (dynamic loads) in dc microgrids have not been studied to date. To fill this gap, this paper presents a comprehensive stability assessment of a dc microgrid with a high penetration level of dynamic loads. Unlike CPLs, it has been found that dynamic loads would dramatically affect the overall system stability margin at low-power demand than at rated power condition. Therefore, three solutions are proposed to mitigate the stability problems considering different operating and installation scenarios that a system integrator/designer may encounter. Moreover, the impact of system uncertainties, such as dc feeder length, bus capacitance, and the droop controllers, on system stability with/without the stability enhancement methods, is thoroughly addressed. Time-domain simulation studies based on nonlinear models are conducted to validate the analytical results. Furthermore, hardware-in-loop real-time simulation studies demonstrate the feasibility of the hardware implementation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
