In consideration of the characteristics and requirements of low voltage microgrid protection，a new microgrid protection scheme based on limited area integration is proposed.The microgrid is divided into several areas based on the bus node，and the limited area protection unit（LAPU）is installed in each area.First，the positive-sequence fault components of each feeder current are extracted，and the fault area can be confirmed by comparing the phase angle difference between the main feeder and slave feeders.Then the fault line can be confirmed by comparing the phase angle difference of the positive-sequence fault current component between different slack feeders.The scheme is capable of inspecting and locating the fault area accurately，isolating the fault line quickly and eradicating the internal fault of microgrid reliably.The PSCAD/EMTDC software is used in the simulation analysis，and the correctness and effectiveness of the protection scheme is verified by simulation results.