An Experimental Investigation on solar PV fed modular STATCOM in WECS using Intelligent controller

This paper describes an optimal way to produce and utilize green power
with better energy efficiency. The power quality issues in wind energy conversion
systems (WECS) are improved by implementing a photovoltaic
(PV) based modular statcom. Modular statcom consist of a modular multilevel
inverter (MMI). The peculiar feature of the MMI is that it does not
need any auxiliary circuit to provide the negative voltage levels. It is inherent
in nature. The DC link of the modular statcom is fed from the PV
source, battery, and Flywheel. The excess power obtained from PV and
WECS is stored in the battery and Flywheel. Continuous power can be supplied
to the load without any interruption is an added advantage of the proposed
system. A landsman converter is implemented for the proposed PV
system to provide regulated and constant DC supply to the modular statcom.
An enhanced second order generalized integrator (ESOGI) with fuzzy logic
controller (FLC) is employed to extract the source reference current signal
and produce gating pulses for the modular statcom. To verify the performance
of the PV-integrated modular statcom, the simulation and experimental
studies are performed under specific load conditions. Results show that
the proposed system with the ESOGI method reduces the current distortions
and satisfies the IEEE-519 standards.