Design and Performance Analysis of a PV Control Scheme to Improve LVRT of Hybrid Power System

Abstract

Solar power stations worldwide have been
rising every year as well as the usage of sustainable power
has increased. The addition into the traditional electricity
grid networks of renewable sources such as the
photovoltaic (PV) system is an essential challenge, given
its erratic power generation. The major issue is to detach
PV from the faulty grid, which leads to fluctuation in the
system's interconnected PV system and system-wide
energy interruptions. The low voltage ride through
(LVRT) enables the PV scheme should stay linked to the
grid even under fault situations in short periods and must
assist the grid return to regular situations according to
the modern grid codes. Hence, this paper develops and
analyzes five aspects of the control strategy to increase the
PV station's LVRT capability. The in-depth simulation of
the independent units of the grid-connected large-scale
PV farm is accomplished using PSCAD/EMTDC to assess
the feasibility of the suggested control tactic for the
modified IEEE nine-bus system.