English title

In this paper an effective method for the purpose of state estimation of fundamental and harmonics signals in the radial power distribution network is presented. In Addition, the application development of this method to the network observability and data processing is considered and analyzed. One of the most advantages of this method is capability of bad data detection and process of them and application on the harmonic state estimation in practical case. In this paper by testing this algorithm on the example system and partial of Isfahan distribution network, the effectiveness and confirmation of this method for the fundamental and 3rd and 5th harmonic frequencies are investigated.