Power Quality Enhancement and Effective Reactive Power Control for STATCOM

Abstract

This research provides a control approach based on a static synchronous compensator (STATCOM) for grid-connected integrated 80 MW offshore wind form (OWF) and 40 MW marine current farm voltage management and damping augmentation (MCF). An analogous wind turbine (WT) is used to model the features of the examined Offshore Wind Farm, while an equivalent squirrel cage rotor induction generator (SCIG) driven by an equivalent marine current turbine (MCT) is used to simulate the characteristics of the MCT. Using modal control theory, a damping controller for the STATCOM is constructed to contribute effective damping characteristics to the analysed system under various operating situations. To test the efficiency of the proposed control method, a frequency domain control strategy based on a linearized system structure using eigenvalue techniques and a time domain control scheme based on a nonlinear system model exposed to different fluctuations are both used. The obtained replies show that the proposed STATCOM in combination with the damping controller is extremely successful in controlling the analysed system under various voltage inequalities. The recommended control technique may also successfully maintain voltage changeability, such as external three phase short circuit failures of the AC bus due to active power fluctuations in the examined system.