Authors : G.A. Gutiérrez, J.D. Rivera, J.C. Castro and F.L. Aguilar
Abstract: This study studies the direction of fault current flow in power systems with the High Impedance Grounding method (HRG). The direction of the current was validated by two methods, the first was to process the signals over time, applying the Fourier transformation to determine the magnitude and phase of each of the signals. The second method analyzes the system in symmetrical components, determining the equations of voltages and currents. The two methods are represented in data diagrams to analyze and compare the results in detail. Finally, it clarifies the confusion that exists in the literature about the direction of the fault current, the appropriate interpretation mode can better adjust the parameters of the programming of the direction of the current. In addition, a way of graphing the limits is proposed to allow a real representation of the currents of the electrical system.
G.A. Gutiérrez, J.D. Rivera, J.C. Castro and F.L. Aguilar, 2020. Novel Approach to Validate the Behavior of Current Flows in Power Systems with High Impedance Grounding Methods. Journal of Engineering and Applied Sciences, 15: 2841-2849.