EMS Strategy

Microgrid Power Dispatch

Microgrid Voltage and Frequency Regulation

PV Power Absorption

On/Off-grid Switching

Seamless On/off-grid switching, switching time≤20ms; DG BESS switching time 0ms. Ensure uninterrupted power supply to the critical load

On-grid to off-grid control: Upon detection of a grid failure, the Static Transfer Switch (STS) opens. The BESS switches to off-grid mode and begins discharging to support the critical load.

BESS to DG control: During BESS discharge, when the SOC drops below 10%, the DG is started and operates at 0 kW(no-load). Once the SOC falls below 5%, the BESS shuts down, and the DG automatically picks up the load, achieving 0ms switching.

Off-grid to On-grid control:  When the grid is restored and stabilized, the BESS switches back to on-grid mode. The STS closes, the DG shuts down, and the load is transferred to the grid. The BESS then begins charging from the grid and enters a standby state once fully charged.