A New Procedure for Identifying and Determining the Contribution of Each Feeder Connected to ABus in Harmonic Contamination of the Bus Voltage in Radial Networks

In recent years, electrical networks have been subjected to harmonic pollution due to the expansion of nonlinear loads such as power electronic devices, electric arc furnaces and etc. In this paper, a new method is presented for identifying and determining the harmonic contribution of each feeder connected to a bus in the radial networks. In these networks, using this method, in the buses that has been subjected to the voltage harmonic distortion, it is possible; firstly, the responsible feeder to voltage harmonic could be identified from all feeders connected to the desired bus. Secondly, the harmonic contribution of each feeder could be quantified. In this method, the harmonic contribution of each feeder connected to a bus is separately determined in a voltage harmonic distortion for each harmonic order; in addition, the harmonic contribution of each feeder on total harmonic distortion of the bus is also determined. This method is based on the comparison of each feeder with the ideal feeder corresponding to them. Also, in this paper, a new method for harmonic modeling of each feeder connected to a bus (from a radial network) is also presented, which is based on linear regression between voltage and current samples and minimization of the sum of least mean squares (LMS) errors.