Short Circuit Detection in Power Systems with Discrete Wavelet Transforms

The article describes the process of developing a short circuit identification procedure for double-sided power line using data obtained from simulations and from a real life lab model of a five node closed loop power system. To develop a computer model that is equivalent of a five node laboratory power system the parameters of the model has to be determined. The proposed short circuit detection algorithm is based on the wavelet function `symlet4' available in MATLAB. The algorithm is capable of detecting disturbances and its locations along the transmission line. Several tests were performed for various short circuit scenarios in order to evaluate the developed identification procedure.