Design of a Gagenbuer Polynomial based Low Voltage Ride ThroughScheme for three-phase system

This paper describes the design and implementation of a Gegenbuer polynomial (GP)-based controller for the operation of a three-phase grid coupled to a renewable PV array. The PV source is linked at the DC link of the voltage source converter (VSC). Least Mean Square (LMS) is used to train the suggested GP method for calculating the fundamental load current value. The controller has many modes of operation and is designed to handle power quality (PQ) concerns. In addition to its normal mode of operation, it can withstand voltage dips. The VSC injects reactive power into the grid in case of low voltage ride through (LVRT) mode of operation. The findings illustrate both normal grid conditions, in which the system will function in unity power factor (UPF), and abnormal grid scenarios, in which the system must run in LVRT mode. Simulation and experimental findings for the different operating modes have been validated using the proposed GP-based controller.