Fault Detection Technique under Pole to Pole Fault of AC-DC Power Network

As one of the solutions for realizing carbon neutrality, South Korea is increasingly interested in protection measures through the development of a renewable energy sources-based AC-DC hybrid power network model and the calculation and digital twins-based analysis of short-circuit currents. This paper proposes a fault detection technique for pole to pole fault for AC-DC hybrid power network model. The proposed fault detection technique consists of a protection algorithm using the rate of change of current and the sum of the squares of the absolute value of the detail coefficient of the Discrete Wavelet Transform. After implementation using PSCAD and MATLAB tools, the performance is evaluated.