A Sensitive Fault Identification Method of Bus Based on Current Sample Data

For improving the speed and sensitivity of bus fault identification, a fast fault identification method based on current sample data is proposed. The current sample date of three phases at the same time is used to identify internal and external fault of bus. The operation time difference of internal fault identification method and external fault identification method also can be used to identify current transformer saturation. The start element performance is not impacted by data window and frequency. The sensitivity of criterion proposed was superior to present criterion. RTDS (Real Time Digital System) simulation results verify the sensitivity and rapidity of bus identification method.