Visible to the public Small-Signal Stability Analysis and Active Damping Control of DC Microgrids Integrated With Distributed Electric Springs

TitleSmall-Signal Stability Analysis and Active Damping Control of DC Microgrids Integrated With Distributed Electric Springs
Publication TypeJournal Article
Year of Publication2020
AuthorsHosseinipour, A., Hojabri, H.
JournalIEEE Transactions on Smart Grid
Keywordsactive damping, active damping control method, community DC microgrid integrated, compensation, compositionality, comprehensive small-signal stability analysis, constant power loads, damping, DC microgrid, DC microgrid expandability, DC microgrids integrated, DCES-integrated microgrid, demand side management, distributed DCESs, distributed electric springs, distributed power generation, dynamic response, dynamic stabilization function, eigenvalue analysis, Eigenvalues and eigenfunctions, electric spring, energy storage, energy storage requirements, expandability, impedance-based stability analysis, Microgrids, noncritical loads, passive components, physical control parameters, power convertors, power distribution control, power grids, power system stability, pubcrawl, Resiliency, series DC electric springs, series DCESs, small-signal model, small-signal stability, smart load, Springs, stability, Stability analysis, state-of-the-art demand-side management technology, system dominant frequency modes, Thermal stability, virtual impedance, Voltage control
AbstractSeries DC electric springs (DCESs) are a state-of-the-art demand-side management (DSM) technology with the capability to reduce energy storage requirements of DC microgrids by manipulating the power of non-critical loads (NCLs). As the stability of DC microgrids is highly prone to dynamic interactions between the system active and passive components, this study intends to conduct a comprehensive small-signal stability analysis of a community DC microgrid integrated with distributed DCESs considering the effect of destabilizing constant power loads (CPLs). For this purpose, after deriving the small-signal model of a DCES-integrated microgrid, the sensitivity of the system dominant frequency modes to variations of various physical and control parameters is evaluated by means of eigenvalue analysis. Next, an active damping control method based on virtual RC parallel impedance is proposed for series DCESs to compensate for their slow dynamic response and to provide a dynamic stabilization function within the microgrid. Furthermore, impedance-based stability analysis is utilized to study the DC microgrid expandability in terms of integration with multiple DCESs. Finally, several case studies are presented to verify analytical findings of the paper and to evaluate the dynamic performance of the DC microgrid.
Citation Keyhosseinipour_small-signal_2020