This
work
presents
an
evolutionary-based
parametrization
for
a
new
discrete-time
robust
adaptive
second-order
sliding
mode
controller.
The
automatic
design
procedure
is
performed
using
genetic
algorithm.
novel
controller
based
on
model
reference
control
theory
and
super-twisting
resulting
applied
to
grid-tied
converter
with
LCL
filter.
proposed
approach,
meta-heuristic
algorithm
inspired
by
natural
processes,
aims
enhance
the
initial
controller's
performance
automating
selection
of
parameters.
Simulation
results
PSIM,
including
switching
synchronization,
are
presented
validate
effectiveness
strategy,
showcasing
improved
in
reducing
transients
enhancing
steady-state
operation
compared
designer
experience.
International Journal of Adaptive Control and Signal Processing,
Journal Year:
2023,
Volume and Issue:
38(1), P. 200 - 220
Published: Oct. 10, 2023
Summary
Grid‐connected
converters
play
a
significant
role
in
renewable
energy
systems,
acting
as
crucial
interface
between
the
inverter
and
electrical
grid,
often
incorporating
LCL
filters.
One
of
primary
challenges
controlling
grid‐injected
current
is
grid
uncertainty,
which
can
have
direct
impact
on
resonance
frequency
filter.
Adaptive
controllers
are
feasible
to
deal
with
this
kind
situation.
However,
setup
these
requires
an
experienced
designer.
This
work
proposes
novel
approach
for
parametrization
adaptive
controllers,
well
their
gain
initialization,
using
particle
swarm
optimization,
considering
performance
indexes
stability
constraints.
The
proposed
improves
tracking
avoids
relevant
overshoots
during
transient
regimes.
experimental
results
regulation
grid‐tied
voltage
source
filter
provide
compelling
evidence
effectiveness
method.
optimized
control
structure
exhibits
significantly
lower
errors
demonstrates
improved
dynamics
when
compared
non‐optimized
structures.
International Journal of Adaptive Control and Signal Processing,
Journal Year:
2024,
Volume and Issue:
39(1), P. 88 - 100
Published: Oct. 10, 2024
ABSTRACT
In
this
article,
new
linear
matrix
inequality
(LMI)
conditions
are
proposed
to
guarantee
robust
stability
of
the
closed‐loop
time‐invariant
one‐dimensional
uncertain
system
by
dealing
with
both
continuous‐time
(CT)
and
discrete‐time
(DT)
cases.
These
improved
for
state
feedback
control
combine
non‐monotonic
approach
Finsler's
technique.
The
benefit
returns
utility
an
arbitrary
number
quadratic
functions
considering
higher
order
derivatives
vector
field
in
CT
case
(or
differences
DT
case).
technique
aims
solve
problem
a
larger
parametric
space.
strong
points
suggested
LMI
easy
program,
eliminate
product
between
Lyapunov
matrices,
reduce
constraints
avoiding
decrease
monotonically
along
trajectories
each
function,
using
state‐feedback
gain.
simulation
results
show
confirm
effectiveness
these
conditions.
IEEE Open Access Journal of Power and Energy,
Journal Year:
2023,
Volume and Issue:
10, P. 629 - 642
Published: Jan. 1, 2023
This
paper
presents
a
novel
approach
for
gridinjected
current
control
of
DC-AC
converters
using
robust
model
reference
adaptive
controller
(RMRAC)
with
deep
symbolic
optimization
(DSO).Grid
voltages
are
known
to
be
timevarying
and
can
contain
distortions,
unbalances,
harmonics,
which
lead
poor
tracking
high
total
harmonic
distortion
(THD).The
proposed
structure
addresses
this
issue
by
enabling
or
disabling
harmonics
compensation
blocks
based
on
the
grid
voltage's
characteristics.The
DSO
framework
is
implemented
generate
an
equivalent
mathematical
expression
voltages,
then
incorporated
into
RMRAC-based
controller.The
able
reconfigure
itself
adequately
compensate
present
in
grid,
reducing
computational
complexity
improving
performance.A
controller-hardware-in-the-loop
(C-HIL)
environment
Typhoon
HIL
604
TSM320F28335
DSP
demonstrate
that
RMRACbased
outperforms
both
same
without
superior
has
potential
applications
less-inertia
power
grids,
where
efficient
accurate
gridconnected
crucial.
This
work
presents
a
novel
discrete-time
robust
adaptive
super-twisting
sliding
mode
(STSM)
controller,
which
is
based
on
the
model
reference
control
theory.
The
controller
used
to
regulate
currents
of
grid-connected
three-phase
full-bridge
voltage-source
static
inverter
with
an
LCL
filter.
proposed
strategy
provides
enhanced
performance
grid-tied
power
system
by
incorporating
robustness
unmodeled
dynamics
and
ability
handle
grid
uncertainties.
effectiveness
validated
through
reliable
simulation
results
in
PSIM,
consider
modulation,
synchronization
voltages
using
Kalman
filter,
inductance
variation.
