Low Voltage Ride through Enhancement Using Grey Wolf Optimizer to Reduce Overshoot Current in the Grid-Connected PV System

In today’s world, the DG should not be disconnected in event of a power outage but instead remain linked to grid and supported by reactive power. This can accomplished implementing low voltage ride through (LVRT) with proportional integral (PI) controller. As result, profile enhanced. The PI controller, on other hand, has drawbacks that setting gain takes long time results an overshoot current grid, which could trigger protection relay. To address this issue, paper proposes employing grey-wolf optimizer (GWO) enhance LVRT 5 MW three-phase grid-connected PV system. A MATLAB simulation was carried out then under fault load disturbance verify efficiency. It is found that, even 70% sag, system connected electrical while minimising side.