Trace of Flicker Sources by Using Non-Parametric Statistical Analysis of Voltage Changes

The paper proposes the use of a multi-point nonparametric method of statistical analysis of voltage changes to identify sources of voltage fluctuations in the power grid. At the beginning of the paper the need to locate disturbing loads and one-point and multi-point methods of their identification were presented, which are most often presented in the literature. The next part discusses the kernel density estimation, which was used in the method for statistical analysis. Then, the propagation of voltage fluctuations was discussed, on the basis of which the proposed method allows to identify the source of disturbances. The individual stages of the proposed method are discussed and the process of locating disturbing loads for three simulated cases in the SIMULINK/MATLAB program has been used.