Fault detection and protection method of microgrid system based on power conversion system operation

摘要

The accident detection and system protection method of an independent microgrid based on a power conversion system (PCS) serving as a main power source in the microgrid according to the present invention, the power conversion device (PCS) generates power when an overcurrent of a certain size or more occurs It is controlled to a value lower than the nominal voltage of the system, and the protection relay detects the fault point through the reverse phase component of the fault feeder flowing by the low voltage to protect the power system.