MATLAB-Based Three-Phase Short-Circuit Current Calculation at Arbitrary Time Instants

In power system fault analysis, the calculation of three-phase short-circuit currents is critically important. MATLAB serves as a widely adopted tool for power system analysis. The MATLAB-based methodology for calculating three-phase short-circuit currents at arbitrary time instants represents a broadly applied approach. This implementation involves extracting essential parameters from electrical equipment nomenclature and connection diagrams, including resistance, reactance, and susceptance values. These parameters are utilized to compute various short-circuit current types, encompassing symmetrical short-circuit currents, asymmetrical short-circuit currents, and ground fault currents. The computational algorithm typically employs impedance matrix formulation and time-domain simulation techniques to capture transient behaviors. Through this calculation method, engineers can better understand current flow patterns and power distribution within power systems, thereby facilitating more effective system design and optimization. Key MATLAB functions often involve matrix operations for impedance calculations and differential equation solvers for dynamic response simulation.