Ultra-Fast Detection and Location of Busbar Faults Employing IMG

This paper presents a method for ultra-fast detection and location of busbar faults. The proposed algorithm is based on the output values of online Improved Morphological Gradient (IMG) that is applied to the superimposed component of current signals. Algorithm only performs fault detection and location using current signals of current transformers (CTs) that are placed in busbar protection zones and can be used in any type of busbar structure. To evaluate the performance of the proposed algorithm, a 400 kV substation model has been simulated by EMTP/ATP-Draw software. The simulation results indicate that the proposed algorithm has high security against external faults, and is able to find the location of the internal busbar fault.