Abstract: Now a day various substation busbars are used to connect a variety of elements, such as transformers as well as transmission lines and loads in the power system. In this paper presents an effective high-speed busbar protection technique according to the propagation theory of traveling wave. If the fault occurs on the busbar, then the detected initial traveling waves on all connected lines will come from their back and this process is defined as positive direction traveling waves. While a fault occurs on any one of these lines the healthy lines are called as positive direction traveling waves and faulted lines are called as negative traveling waves. In this paper presents an effective method for finding the fault direction. The fault direction can be established according to the amplitude integral relationships between the positive direction traveling wave and the negative direction traveling wave and for this purpose busbar protection scheme can be constructed. Simulation results show that the proposed method can rapidly and reliably discriminate the internal faults from external faults, and the protection performances are immune to fault resistances, fault inception angles, fault types, and current-transformer saturation. The software which is used to design this proposed system is Matlab for training the proposed busbar system.
Keywords: Busbar Protection, Traveling Wave, Amplitude Integral, Extra High Speed, Fault, Current-Transformer (CT).