Abstract
Photovoltaic (PV) inverter is the basic unit for low voltage ride through (LVRT) to determine dynamics of grid tied PV plant. There are various control methods for PV inverter. In this paper two methods i.e. Taguchi and Ziegler-Nicholas are used to tune and control the proportional integral (PI) controller for PV inverter. Based on the study of modeling and simulation by PSCAD/EMTDC, it was analyzed and proved that feasibility and effectiveness of grid tied PV model under controlled environment. For this purpose a detail model grid tied PV model is designed in PSCAD. Cascaded control scheme is used for grid-tied PV inverter. Cascade controller using PI controllers are fine-tuned using Taguchi Approach and Ziegler Nicholas method. Simulation results indicate the capability of the PV system to ride through the faults determined by low voltage ride through (LVRT) under Taguchi tuning method is better than Ziegler-Nicholas Method.