Synchronous Generator Modeling Using a MATLAB-Based dq Method for Dynamic Characteristic Analysis
Keywords:
dq model, synchronous generator, stator resistance, dynamic response, MATLAB simulationAbstract
This study analyzes the dynamic characteristics of a synchronous generator using a MATLAB-based direct-quadrature (dq) model. The dq model simplifies the analysis by transforming three-phase electrical quantities into direct and quadrature rotating axes. The simulation evaluates the effect of stator-resistance variations on stator current, electromagnetic torque, rotor speed, rise time, and settling time. The results show that a lower stator resistance produces higher current and torque and a faster response, but also causes larger transient oscillations. In contrast, a higher stator resistance improves damping and stability, although it reduces generator performance. These findings confirm a trade-off between dynamic performance and operating stability, so the stator-resistance value should be selected according to the system's operating requirements.
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