Coordinated power control with virtual inertia for fuel cell-based DC microgrids cluster

Abstract

This paper proposes a coordinated power control method with virtual inertia (VI) for fuel cell-based DC microgrids (MGs) cluster based on the multi-agent system (MAS) control frame. In the primary control layer, a local energy management strategy with virtual inertia is adopted to suppress the bus voltage disturbance, smooth the output power of fuel cell, as well as manage the power flow in the DC MG. In the secondary and tertiary control layers, a coordinated power control method based on MAS frame is implemented for the power flow among the sub-MGs. More specifically, the secondary voltage control loop is used for the bus voltage smooth control at the moment of microgrids interconnection, and the power flow tertiary control regular is applied for the battery SoC converge uniformly in finite time. Also, a fuel cell-based DC microgrids cluster real-time simulation platform is established to verify the control performance of the proposed coordinated power control method on the bus voltage smooth control, the SoC consistency control, load abrupt response and ‘plug and play’ capability.