Small Signal Analysis of Gate Controlled Series Capacitor based Tidal Generation using Hybrid Crow Search-Nelder Mead Algorithm

In this paper, dynamic and steady-state stability enhancement of tidal turbine based direct driven permanent magnet synchronous generator with gate controlled series capacitor (GCSC) is presented. To accomplish this objective, a reserve power margin is created on tidal power generation (TPG) using speed control and pitch angle control strategies to deliver supplementary active power to the system in case of system events. Also, GCSC is added with TPG to damp the signal oscillation quickly and provides uninterrupted capacitive reactance without the threat of resonance. Parameters of GCSC are optimized using hybrid crow search and nelder mead algorithm. Dynamic simulation based on time domain is carried out on nonlinear model to find dynamic stability under different system disturbances whereas eigenvalue analysis based on frequency domain is performed to define steady-state steadiness under different tidal speeds. The proposed investigation is confirmed on the multi-machine system.