Energies,
Год журнала:
2024,
Номер
17(24), С. 6472 - 6472
Опубликована: Дек. 23, 2024
The
performance
of
converter
valves
is
essential
for
the
reliability
and
efficiency
high-voltage
direct
current
(HVDC)
transmission
systems.
Converter
consist
multiple
thyristor
levels,
each
requiring
regular
testing
to
ensure
proper
functionality.
Protective
triggering
tests
play
a
crucial
role
in
evaluating
safety
these
thyristors
during
maintenance.
This
study
introduces
high-power
experimental
setup
designed
investigate
effects
varying
levels
thermal
stresses
on
reverse
recovery
behavior
thyristors—a
key
indicator.
Results
indicate
that
time
increases
rapidly
with
higher
before
reaching
saturation
point.
Additionally,
prolonged
exposure
high
temperatures
significantly
reduces
both
storage
amount
charge
recovered
process.
These
findings
enable
optimization
protective
test
settings,
thereby
enhancing
effectiveness
Thyristor
Control
Unit
(TCU)
protecting
valves.
Improved
methodologies
derived
from
this
research
contribute
more
reliable
maintenance
practices
increased
overall
stability
HVDC
Results in Engineering,
Год журнала:
2024,
Номер
23, С. 102642 - 102642
Опубликована: Авг. 2, 2024
This
paper
presents
a
comprehensive
study
on
advanced
control
and
energy
management
in
multi-source/multi-load
microgrid.
The
microgrid
integrates
solar
panels,
wind
turbine
system,
Li-ion
battery-based
storage
an
electric
vehicle
(EV),
DC
load,
all
inter-connected
through
power
electronic
converters
to
bus
linked
the
AC
grid
via
DC/AC
inverter.
outlines
primary
objectives:
voltage
regulation,
optimization
of
photovoltaic
conversion,
maintaining
high-quality
injection
into
grid.
Given
intermittent
nature
varying
demands
that
affect
battery
life
performance,
novel
algorithm
is
introduced.
addresses
different
operating
modes,
such
as
Constant
Current
(CC)
Voltage
(CV),
enhance
network
stability,
quality,
optimize
distribution
between
various
sources
EV.
proposed
fuzzy
logic
controllers,
known
for
their
robustness
uncertainties,
flexibility,
ease
implementation,
are
employed
achieve
these
objectives.
Particle
Swarm
Optimization
(PSO)
used
fine-tune
parameters,
ensuring
optimal
performance.
process
included
minimizing
Integral
Absolute
Error
(IAE),
Square
(ISE),
Time-weighted
(ITSE)
objective
functions.
Extensive
simulations
under
scenarios
demonstrated
significant
improvements
accuracy,
system
Electronics,
Год журнала:
2025,
Номер
14(1), С. 150 - 150
Опубликована: Янв. 2, 2025
DC
micro-grids
are
emerging
as
a
promising
solution
for
efficiently
integrating
renewable
energy
into
power
systems.
These
systems
offer
increased
flexibility
and
enhanced
management,
making
them
ideal
applications
such
heat
pump
(HP)
However,
the
integration
of
intermittent
sources
with
optimal
management
in
these
poses
significant
challenges.
This
paper
proposes
novel
control
strategy
designed
specifically
to
improve
performance
micro-grids.
The
enhances
by
leveraging
an
environmental
mission
profile
that
includes
real-time
measurements
generation
evaluation.
micro-grid
application
pumps
integrates
photovoltaic
(PV)
systems,
wind
generators
(WGs),
DC-DC
converters,
battery
storage
(BS)
proposed
employs
intelligent
maximum
point
tracking
(MPPT)
approach
uses
optimization
algorithms
finely
adjust
interactions
among
subsystems,
including
sources,
batteries,
load
(heat
pump).
main
objective
this
is
maximize
production,
system
stability,
reduce
operating
costs.
To
achieve
this,
it
considers
factors
heating
cooling
demand,
fluctuations
from
MPPT
requirements
PV
system.
Simulations
over
one
year,
based
on
real
meteorological
data
(average
irradiance
500
W/m2,
average
annual
speed
5
m/s,
temperatures
between
2
27
°C),
carried
out
Matlab/Simulink
R2022a,
have
shown
model
predictive
(MPC)
significantly
improves
micro-grids,
particularly
applications.
ensures
stable
bus
voltage
(±1%
around
V)
maintains
state
charge
(SoC)
batteries
40%
78%,
extending
their
service
life
20%.
Compared
conventional
methods,
efficiency
15%,
reduces
costs
30%,
cuts
CO2;
emissions
25%.
By
incorporating
strategy,
sustainable
reliable
applications,
contributing
transition
towards
cleaner
more
resilient
also
opens
new
possibilities
grids,
providing
efficient
at
local
level.
Results in Engineering,
Год журнала:
2024,
Номер
23, С. 102701 - 102701
Опубликована: Авг. 13, 2024
This
paper
proposes
a
Hybrid
Multi-Port
DC
Circuit
Breaker
(HMPDCCB)
design
that
addresses
the
limitations
of
existing
hybrid
circuit
breakers
(HDCCBs),
such
as
high
cost,
complexity,
and
slow
response
to
fault
current
voltage
demands.
The
HMPDCCB
is
based
on
common
breaker,
energy
dissipation,
regeneration
branch
for
all
connected
HVDC
lines,
reducing
interruption
time
1.8
milliseconds.
It
effectively
manages
through
Insulated
Gate
Bipolar
Transistors
(IGBTs)
main
breaker
with
parallel
surge
arrester,
losses
enhancing
power
system
efficiency.
provides
selective
protection
lines
at
lower
investment
cost
incorporates
current-limiting
inductors
(CLIs)
rise
currents.
proposed
has
been
rigorously
modelled
simulated
using
MATLAB
Simulink®/Simpowersystems,
simulations
show
it
achieves
milliseconds
reset
fewer
than
3
milliseconds,
outperforming
models.
Sustainability,
Год журнала:
2025,
Номер
17(7), С. 3079 - 3079
Опубликована: Март 31, 2025
HVDC
cable
systems
are
becoming
an
upscaled
technical
option,
compared
to
AC,
because
of
various
factors,
including
easier
interconnections,
lower
losses,
and
longer
transmission
distances.
In
addition,
renewables
providing
direct
DC
energy,
electrified
transportation,
aerospace
where
can
be
favored
higher
carried
specific
power
all
point
in
the
direction
broad
future
usage
HV
MV
links.
However,
contrary
there
is
little
return
from
on-field
installation
as
regards
long-term
reliability
aging
processes.
This
gap
must
covered
by
intensive
research,
contributing
this
research
purpose
paper.
The
focus
on
key
points
for
(and
MVDC)
sustainability,
design
modeling
able
account
voltage
transients
extrinsic
(such
that
caused
partial
discharges)
impact
insulation
conductivity
(which
rules
electric
field
distribution,
thus
rate).
Also,
recyclable
nanostructured
materials,
well
health
conditions,
considered.
It
shown
how
accelerated
due
transients,
aging-time
dependence
conductivity,
free
PDs.
Algorithms
condition
evaluations,
which
have
additional
value
a
relatively
new
technology
such
polymeric
cables,
applied
system
under
discharges,
showing
they
provide
indication
degradation
globally
or
locally
(weak
spots)
possible
maintenance
times.
All
effectively
contribute
reducing
risk
major
breakdown
damage
operation,
would
significantly
affect
investment
(ROI).
