A micro grid network protection method and apparatus

The present invention discloses a micro-network protection method and apparatus for power, mounted by dispersing voltage and current collecting lines IED intelligent electronic unit main transformer, a bus bar, both sides of the power lines; fault detection method according to the set, it is determined if the mains fails, when it is judged the main grid system during normal operation, and continues to monitor the operating state of the mains microgrid, when it is judged mains fails, the network monitoring system to work, this time according to the first intelligent electronic unit IED the fault direction is determined that link failure information, and then determines the failure information is transmitted to the protective control host. The present invention employs a network of micro grid protection system for real-time monitoring, so that the microgrid protection into an organic unity, coordination and cooperation between each other, to achieve the protection of the micro-grid "four properties", ensure the safe and stable operation of the micro-grid system improve the efficiency and reliability of distributed power source DG.