Stability enhancement for a superconducting generator in multimachine power system using STATCOM

This paper investigates the multi-machine power systems stability enhancement by means of STATCOM-based stabilizers. To demonstrate the influence of the introduction of the STATCOM to the power systems, a comparative study is implemented by attaching a single SVC or a single STATCOM to the studied power system. The under-study power system includes a superconducting generator (SCG) and nine conventional units of different types and ratings. In view of control, various types of control systems are used such as Proportional Integral Derivative (PID) controller and power system stabilizers (PSSs). The system's nonlinear model is established by achieving a satisfactory degree of accuracy and tested for various types of contingency. The simulation results reveal that, the introduction of STATCOM is achieving further enhancement of the system performance in terms of damping increase and fast return of system variables to their nominal values under different disturbances such as 3-phase short circuit, step increase in load, and line outage compared to the SVC-based stabilizers.