become an important criterion in energy system. The main factors affecting the quality of power are harmonics, flicker, transients, voltage sags (Sags), sudden voltage surges (Sweels). The harmonics causes resonance, sudden trips, loss and so on and this problems adversely affect the quality of power. In this study values of residential and industrial zones were examined. Different ways are used for the analysis and the estimation of the harmonics. In order to get an estimate of the value of values Artificial Neural Networks were used. values were estimated with using this ANN model. With this method, accurate estimated values obtained. This estimated values can be used to selecting the required filter system. In this way, by reducing harmonic values, a significant improvement in power quality can be achieved. With the proposed ANN model, equipment that improve the power quality can be preselected while planning energy distribution systems. This model can be used for the planning the energy systems which has the high Power Quality. This ANN model can be used to estimate values in different systems .