Saintgits college of Engineering

Abstract--- A new travelling wave based directional protection technique is used in this paper. An extra high speed busbar protection is achieved by this technique. Within a short period of fault occurrence, positive and negative direction travelling waves are extracted, respectively and the corresponding ratio is calculated. This obtained ratio is then compared with a set threshold value. If the ratio value is less than this threshold, the fault direction is thought as positive; otherwise, the fault direction is negative. To evaluate the proposed technique, a typical busbar model was built in PSCAD/EMTDC and the proposed method is verified. Keywords--- Directional travelling wave, Fault location, Transient detection I