Voltage Synchronization of Discrete-time Microgrids over Analog Fading Channels

Abstract

Abstract In this paper, a robust distributed leader-follower tracking synchronization control scheme is developed for discrete-time DC microgrids over analog fading channels. The specific objective is to synchronize the output voltage of microgrids to the reference value by employing a fading communication network with multiplicate noises. For efficient coordination of distributed energy resources (DER), a distributed leader-follower tracking synchronization control protocol with shared communication framework and considering multiplicative noise disturbances is considered. Specifically, in order to restore the output voltage sag of DERs caused by the local loads changes, the proposed distributed cooperative controllers are designed to synchronize the output voltage of DERs to the desired value. Then the closed-loop stability analysis of the whole system is carried out, accordingly we derive the sufficient conditions to achieve all the DERs’ output voltage synchronization in mean square. Moreover, the control gains have been designed to guarantee the convergence. With the proposed scheme, control derivation of voltage produced during the primary control stage can be well remedied even if the multiplicative communication noises exist. Simulation results on a DC microgrid control system are provided to show the effectiveness of the proposed control protocols against multiplicative communication noises effect.