LG FAULT RIDE-THROUGH CAPABILITY ENHANCEMENT OF PV SYSTEM WITH VOLTAGE SUPPORT CONTROL STRATEGY

Abstract

This paper presents a unique application of continuous mixed -norm (CMPN) algorithm-based adaptive
management strategy with the aim of enhancing the low voltage ride through (LVRT) the capability of grid-connected
electrical phenomenon (PV) power plants. The PV arrays are connected to the purpose of common coupling through a DCDC boost converter, a DC-link capacitor, a grid side inverter, and a three-phase step up transformer. The DC-DC converter
is used for a maximum power point tracking operation based on the fractional open circuit voltage method. The grid-side
inverter is utilized to control the DC-link voltage and terminal voltage at the PCC through a vector control scheme. The
CMPN algorithm-based adaptive proportional-integral (PI) controller is used to control the power electronic circuits due to
its very fast convergence. The proposed algorithm updates the PI controller gains online without the need to fine tune or
optimize. The effectiveness of the proposed control strategy is compared with that obtained using Taguchi approach- based
an optimal PI controller taking into account subjecting the system to symmetrical, unsymmetrical faults, and unsuccessful
reclosing of circuit breakers due to the existence of the permanent fault.