Control strategy of frequency and DC voltage for interfacing converter of hybrid AC/DC microgrid based on improved virtual synchronous generator
IET Renewable Power Generation,
Год журнала:
2025,
Номер
19(1)
Опубликована: Янв. 1, 2025
Abstract
Integrating
renewable
resources
in
microgrids
(MGs)
poses
a
substantial
challenge:
ensuring
stability
with
low
inertia.
This
paper
provides
control
techniques
for
the
AC
frequency
and
DC
voltage
an
isolated/islanded
hybrid
AC/DC
MG
using
intelligent
virtual
synchronous
generators
(VSGs)
capacitors
(VCs).
The
suggested
approaches
take
advantage
of
VSG's
adaptive
damping
coefficient
VC's
resistance
as
defined
by
controls.
controllers
operate
independently,
relying
solely
on
local
measurements
without
additional
communication
infrastructure.
Compared
to
traditional
VSG
VC,
VC
controls
performs
better
suppressing
deviations,
regardless
operating
mode
(rectifier
or
inverter).
Simulation
studies
MATLAB/Simulink
validate
these
findings,
showing
that
artificial
neural
network
(ANN)
approach
reduces
deviation
34.4%
26.3%,
while
fuzzy
logic
(FLC)
further
particularly
41.9%
23.2%.
ANN
excels
reducing
deviations
frequency,
FLC
is
more
effective
lowering
voltage.
proposed
controllers'
positive
impact
system
assessed
small‐signal
analysis.
Язык: Английский
Research on the Dynamic Stability of AC/DC Hybrid Microgrids in New-Energy Ships
Journal of Marine Science and Engineering,
Год журнала:
2025,
Номер
13(3), С. 485 - 485
Опубликована: Фев. 28, 2025
For
the
frequent
occurrence
of
pulse
power
load
operation
and
switching
disturbances
in
AC/DC
shipboard
microgrids,
a
large-signal
stability
analysis
method
based
on
hybrid
potential
theory
is
proposed.
The
proposed
utilizes
mixed
function
to
analyze
impact
interconnected
converters
system
stability.
First,
entire
equivalently
modeled
as
DC
d-q
rotating
reference
frame.
Then,
model
established
for
analysis,
leading
development
criterion
system.
Using
this
criterion,
boundary
values
bidirectional
transfer
are
derived.
Finally,
simulation
microgrid
was
built
Simulink
verification,
further
validation
carried
out
RT-lab
hardware-in-the-loop
(HIL)
platform.
Simulation
experimental
results
show
that
can
effectively
ensure
under
large
disturbances.
Язык: Английский