Stabilization of DC microgrid under event-triggered aperiodic intermittent control
LIU Yong-zhong
LIU Bin
XIE Zhou-teng
Abstract：This paper investigates the problem of event-triggered intermittent control in DC(direct-current)microgrids,where the load power exceeds the stability region and causes system state dispersion.Due to the stochastic nature of DC microgrid load power,the negative impedance characteristics of high-load power may lead to system instability.In this paper,the stability of the DC microgrid is enhanced through the implementation of an energy storage system and control over its injection current.Considering that the energy storage is limited by the actual physical conditions,the output energy of the controller and the magnitude of the control current are constrained in this paper.To optimize communication bandwidth utilization and conserve control resources,an event-triggered intermittent controller based on state control width is designed.The stability of the proposed control is established through Lyapunov function method,and the Zeno behavior is also excluded in the stability analysis.Finally,a practical microgrid example is presented to demonstrate the efficacy of the proposed control scheme.
Keywords：constant power loadsdirect-current(DC)microgridintermittent controlevent-triggered controlstability
Publication Date：2025-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 355-363 )