Dynamic stability enhancement of nuclear power plants of Taiwan power system using STATCON

This paper investigates the application of static condensers (STATCON) to enhance the dynamic stability of the nuclear power plants in the Taiwan power system. The studied system, containing identical parallel operated turbine-generators, is employed to analyze the effectiveness of the proposed STATCON with reactive power modulation. Two PID controllers using individual shaft speed deviations as feedback signals are designed by using modal control theory to modulate the reactive power flow of the STATCON. A frequency-domain approach based on eigenvalue analyses and a time-domain approach based on nonlinear model simulation are both performed to validate the effectiveness of the proposed damping scheme. It can be concluded from the simulation results that the proposed STATCON and the designed damping controllers can effectively improve the dynamic stability of the studied system and increase the maximum power transfer of the transmission line