Simulation of high impedance ground fault In electrical power distribution systems

A new model of High Impedance Fault (HIF) in electrical power distribution feeders is introduced in this paper. Proposed model is based on Emanuel arc model and contains some features, such as nonlinearity characteristics of HIF and all frequency components up to 12 kHz. Fast Fourier Transform (FFT) and Principal Component Analysis (PCA) are used on real test data to extract and reduce the features. Also Bonferroni confidence interval is applied for comparing simulated models with measured currents. This model contains 6 arc models like Emanuel arc models. Presented model is simulated with ATP/EMTP and probability switch is used for simulating random state of HIF feature. 5 models are developed for several amplitudes of HIF current. All models are accurate for simulation of HIF current.

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