A METHOD AND A SYSTEM FOR A FAST BUS TRANSFER IN AN ELECTRICAL POWER SYSTEM

摘要

A method for synchronizing and connecting a first sub power system with a second sub power system with an intelligent electronic device (IED) by use of at least one switching device between the first sub power system and the second sub power system in an electrical power system is provided. The method comprises the IED monitoring power supply parameters such as voltage magnitude, phase and other derived parameters such as voltage and phase differences in the first sub power system and the second sub power system to identify at least one instance for fast bus transfer where the two sub systems have acceptable differences in magnitude and phase. According to the identified one instance the IED has phase shifting or/and voltage magnitude correction carried out in anticipation for synchronizing power supplies on connection at the identified instance. The switching device is operated to make connection at the identified instance to have efficient and fast bus transfer. A synchronizing system is also provided.