Multi-functional voltage and current based enhancement of power quality in grid-connected microgrids considering harmonics
Heliyon,
Год журнала:
2024,
Номер
10(4), С. e26008 - e26008
Опубликована: Фев. 1, 2024
The
introduction
of
a
renewable
energy
source
(RES)
based
multi-functional
grid-tied
inverter
(MFGTI)
stands
as
favorable
remedy
for
addressing
power
quality
concerns
within
distributed
generation
(DG)
systems
and
microgrids.
Nonetheless,
the
effectiveness
traditional
MFGTI
will
be
restricted
in
issues
on
voltage.
presented
research
proposes
novel
structure
to
enhance
associated
with
voltage,
current,
harmonic
distortions
resulting
from
both
grid
loads.
Based
this
strategy,
introduced
can
linked
by
bidirectional
switches
either
parallel
or
series.
This
feature
provides
various
operational
conditions
response
diverse
disruptions
grid.
To
effectively
adjust
current
voltage
reduction
are
determined
through
mathematical
analysis,
considering
load
requirements.
Furthermore,
strategy
offers
different
compensation
strategies,
control
schemes,
transition
modes
MFGTI.
major
disturbances
such
unbalanced
balanced
swell/sag,
harmonics,
interruption
compensated.
shunt
controller
is
second
order
sequence
filter
(SOSF)
provide
active
component.
A
damping
PI
regulator
series
swell/sag
reduction.
Moreover,
new
three
level
hierarchical
proposed
which
droop
compensating
decouple
dual
synchronous
reference
frame
(DDSRF)
sag/swell
utilized.
simulations
MATLAB/SIMULINK
show
that
using
compensate
changing
states
algorithm
switches.
Язык: Английский
Evaluation of the Impact of Photovoltaic Solar Power Plant Integration into the Grid: A Case Study of the Western Transmission Network in the Democratic Republic of Congo
Energies,
Год журнала:
2025,
Номер
18(3), С. 639 - 639
Опубликована: Янв. 30, 2025
Rising
electricity
demand
and
the
need
to
reduce
pollutant
emissions
highlight
importance
of
renewable
energy,
especially
solar
power.
While
most
studies
on
photovoltaic
(PV)
integration
focus
developed
countries,
least
developing
countries
such
as
Democratic
Republic
Congo
(DRC)
face
particular
challenges
due
fragile
grid
infrastructure.
This
work
evaluates
technical
operational
impacts
PV
into
western
DRC
using
DIgSILENT
PowerFactory
2021
SP2
simulations.
It
examines
penetration
levels
from
10%
50%
based
a
2012
MW
baseline,
power
losses,
short-circuit
ratios
(SCRs),
stability,
harmonic
distortions,
voltage
oscillations.
Results
reveal
that
moderate
(10–20%)
active
losses
by
25%
while
maintaining
stability.
However,
above
30%
penetration,
critical
arise,
including
drop
SCR
below
minimum
recommended
value
3,
prolonged
oscillations,
increased
resulting
reduced
overall
inertia
following
increase
in
inverters
without
inertia.
These
findings
emphasize
for
targeted
solutions
like
Battery
Energy
Storage
Systems
(BESSs),
Static
Synchronous
Compensators
(STATCOMs),
filters.
provides
foundational
insights
grids
LDCs
countries.
Язык: Английский
A Novel Mixed Mppt Algorithm Based on P&O and Fuzzy-Logic Approaches
Опубликована: Янв. 1, 2024
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Язык: Английский
A Flexible Control Strategy for Multi-Functional PV Inverters with Load Compensation Capabilities Considering Current Limitations and Unbalanced Load Conditions
Energies,
Год журнала:
2024,
Номер
17(17), С. 4218 - 4218
Опубликована: Авг. 23, 2024
Multi-functional
photovoltaic
(PV)
inverters
incorporate
ancillary
services
to
enhance
power
quality
and
mitigate
stability
issues
in
distribution
networks.
These
next-generation
PV
will
achieve
a
higher
utilization
of
the
inverter’s
rated
capacity,
improving
cost-effectiveness
technology.
However,
required
perform
services,
such
as
load
compensation
capabilities,
could
exceed
risking
components’
integrity.
Therefore,
multi-functional
control
algorithms
must
limit
capacity
according
system’s
nominal
currents.
Despite
this,
most
proposals
do
not
address
this
issue
when
balancing
capabilities
are
included
for
inverter
control.
This
paper
proposes
flexible
strategy
three-phase
inverters,
considering
functionalities
while
keeping
currents
within
safe
operating
limits.
The
proposal
introduces
two
parameters
whose
variation
results
different
capabilities.
can
be
adapted
dynamically
used
active
injection
requirements.
Additionally,
algorithm
is
proposed
current
values
supported
by
device.
also
allows
setting
objectives
following
priority
scheme
which
prioritized
over
functionalities.
Reactive
considered
at
lower
level
hierarchical
priority.
was
evaluated
through
experimental
tests
on
prototype
under
various
operational
conditions.
show
an
excellent
performance,
achieving
unbalanced
Язык: Английский
Sliding Mode-based Direct Power Control of Unified Power Quality Conditioner
Heliyon,
Год журнала:
2024,
Номер
10(20), С. e39597 - e39597
Опубликована: Окт. 1, 2024
Язык: Английский
Active power compensation circuit for resonance mitigation and harmonic reduction in microgrid system
Mechatronics Electrical Power and Vehicular Technology,
Год журнала:
2024,
Номер
15(1), С. 32 - 41
Опубликована: Июль 31, 2024
The
nature
and
behavior
of
capacitors,
transformers,
inductors,
active
compensators,
non-linear
loads
can
produce
power
resonance.
Unfortunately,
the
presence
a
resonance
phenomenon
have
negative
impact
on
system
stability
lead
to
catastrophic
failures.
Therefore,
even
when
using
modern
or
conventional
techniques
enhance
total
harmonic
distortion
(THD)
improve
input
factor
(IPF),
it
is
necessary
avoid
An
compensation
circuit
(APCC)
proposed
designed
function
with
two
categories
linear/non-linear
loads.
APCC
has
been
implemented
regulated
an
adjusted
pulse
width
modulation
technique.
aim
suggested
minimize
AC
side
distortions,
IPF,
mitigate
harmonics
at
same
time.
simulation
results
demonstrate
that
investigates
this
study
by
absorbing
harmonics,
correcting
eliminating
problems
under
both
transient
steady-state
operating
conditions.
supply
voltage
current
THD
values
for
first
type
are
reduced
96.7
%
96.3
%,
respectively,
α=30°.
Meanwhile,
second
circuit,
91.92
90.4
%.
Also,
IPF
changed
circuits
from
0.72
0.86
almost
unity.
These
demonstrated
effective
performance
controller
in
reducing
resonance,
modifying
factors.
Язык: Английский
An Improved Control Method for Current Harmonics, Reactive Power Compensation and Effective Power Flow with Active Power Filter
Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi,
Год журнала:
2023,
Номер
13(2), С. 995 - 1004
Опубликована: Май 20, 2023
İndüktörler,
kapasitörler,
transformatörler,
doğrultucular,
kesintisiz
güç
kaynakları,
elektrikli
makineleri
ve
flüoresan
lambalar
gibi
çeşitli
konut
yükleri,
faktörünün
bozulmasına
harmoniklere
neden
olmaktadırlar.
Elektrik
sistemlerine
bağlı
reaktif
yükler,
ana
şebekedeki
akım/güç
kalitesini
faktörünü
azaltan
üretmektedirler.
Bu
nedenle,
istikrarlı
güvenilir
bir
elektrik
şebekesi
için
yeterli
sağlanması
gerekir.
bağlamda,
bu
makalede
üç
fazlı
şönt
aktif
filtresi
(ŞAGF)
ile
farklı
yüklerin
harmonik
etkilerinin
ortadan
kaldırılması,
kompanzasyonun
etkili
şekilde
akışını
geliştirilmiş
kontrol
yöntemi
önerilmiştir.
Önerilen
yönteminin
performans
sonuçları,
dirençli-kapasitif
doğrusal
yük
(D-KDY),
dirençli-endüktif
(D-EDY),
olmayan
(DOY)
yüksek
endüktif
DOY
kapsamlı
durum
çalışmaları
altında
incelenmiş
geleneksel
karşılaştırılmıştır.
faktörü
sağlamak
şebekeden
çekmeden
ŞAGF
sağlamaktadır.
Çeşitli
çalışmaları,
önerilen
şebeke
akımı
gerilimi
arasındaki
faz
uyumsuzluğunu
azaltabileceğini
harmoniklerini
göstermektedir.
Farklı
grupları
etkisi
altında,
yaklaşık
0.99
değeri
elde
edilirken
0.79
0.81
daha
düşük
değerleri
edilmiştir.
Ayrıca
kaldırılarak
akım
harmoniklerinin
THB’
si
%1.0
seviyesinin
altına
düşürülmüştür.