Distributed Power Sharing Control for Low-voltage Microgrids Through Multiagent Networks Subject to Disturbances

Abstract

This paper develops a stochastic distributed power sharing control for ac microgrids with massive current-controlled voltage source inverter (CCVSI)-based distributed generators (DG). A novel distributed cooperative control strategy has been proposed achieve the accurate power sharing property among DGs in ac microgrids through multiagent networks subject to transmission time delays and noise disturbances. A Lyapunov-based stochastic distributed cooperative control protocols are designed for DGs, in which manner the criteria for the stability analysis and delays boundedness considering noise disturbances to maintain the system stable are derived. With the proposed control protocols, the accurate power sharing can be well achieved even if the communication delays may exist in noise environments. Moreover, the proposed control protocols are implemented through sparse communication networks and thus meet the plug-and-play feature of the future smart grid. Finally, the effectiveness of the proposed control strategy has been evaluated by offline time-domain simulations in MATLAB/Simulink environment.