Intensifying The Performance of Dynamic Voltage Restorer Using Optimized PI Controller Based Harris Hawks Optimization (HHO) Algorithm

Dynamic voltage restorers’ dynamic, transient, and steady-state responses are essential in saving electrical devices from voltage sag, swell and unbalances. Control structures that exist now take success in achieving settled voltage restoration. However, they fail to account for the inherent oscillations that may happen at the time of DVR introduction or exiting the system. In this paper, a simple control structure is showcased, which will look after the dynamic response, transient and steady-state responses, and the transient inherent oscillations. This proposed control structure consists of a feedforward upstream disturbance detection signal. The closed-loop feedback control signal accomplishing feedforward term improves system response and reduces transient oscillations. The latest metaheuristic optimization algorithm, the Harris Hawks optimization (HHO) algorithm, is used to select distinguished PI controller parameters. The Control system is modeled in a synchronous reference frame (SRF). The system is simulated using MATLAB/Simulink.