Simulation of Short-Circuit Voltage and Current in Single-Machine Infinite Bus System

In this paper, we provide a comprehensive discussion on the simulation of short-circuit voltage and current in single-machine infinite bus systems. We begin by introducing the concept of infinite bus systems and their applications in power system analysis. The simulation typically involves implementing differential equations using numerical methods like Runge-Kutta, where key parameters such as generator reactance (Xd') and inertia constants are programmed into the model. We then delve into the conceptual foundation of short-circuit voltage, detailing calculation methodologies and simulation techniques accompanied by practical case studies. For current simulation, we explore methods that often involve solving network equations with fault impedance matrices, implemented through algorithms like nodal analysis or symmetrical components. The implementation typically includes MATLAB functions for phasor calculation and time-domain simulation using tools like Simulink. Furthermore, we examine how current simulation techniques integrate with short-circuit voltage computations, particularly through iterative fault current calculations using Newton-Raphson methods. Finally, we analyze simulation results and their practical applications, while offering perspectives on future research directions involving advanced fault detection algorithms and real-time simulation frameworks. This paper aims to provide valuable insights and assistance for researchers and practitioners in related fields.