Microgrid based on back to back configuration and control method of AC-DC converter

The present invention relates to a structure and method for controlling a microgrid AC-DC converter based on back to back, and use the terminal to achieve network protection and network fault protection, control and switching networks, and provides the switching instruction from the grid, the source charge using a micro balance control terminal implemented in the off-grid power and run the overall balance of active power output and load output, the power storage system, the standby power of the distributed power generation unit, the present invention also uses back-DC converter, when an abnormal external micro power grid, and continue to be possible to realize smooth switching off the electrical network, in the case of loss of power distribution grid, the microgrid may be a smooth transition from the running web, the reliability of power supply for the effective protection of the microgrid load.