Abstract—Successful detection of High-Impedance Fault (HIF) has remained a challenge for researchers and power system protection engineers because of the low magnitude of the fault current and fluctuating fault current that can become momentarily unstable. This paper presents a new method for detecting HIF in electrical power distribution system based on analysis of alternating current waveforms. Since HIF current can be asymmetrical or symmetrical, the research modeled and analyzed both the positive and negative half-cycles of pre-fault and post-fault current waveforms. Fuzzy logic system is integrated with this new HIF detection system to provide a means for categorizing fluctuating average fault current values in appropriate Fuzzy subsets. The effectiveness of this new detection method was verified through numerical simulations implemented using Matrix Laboratory (MATLAB) software, Fuzzy logic toolbox and Python integrated development environment. Results obtained show that this new technique can effectively detect high-impedance fault in electrical power distribution system at any point between 0° and 360° of the current waveforms.