Fundación Naturgy / FPE. Vol.2 Digitalización de redes eléctricas
86 • 2. La tecnología actual del Centro de transformación Del mismo modo los contadores inteligentes permiten programar distintas tarifas: – En un contrato con tres periodos tarifarios. – En tres contratos independientes con tres periodos tarifarios cada uno. – En tres contratos que comparten los seis periodos tarifarios y los 30 días especiales. – En tres contratos independientes con seis periodos tarifarios cada uno. 2.4.4. Comunicación PLC La comunicación de esta nueva generación de contadores con sus gestores se realiza en el tramo de última milla a través del propio cable de BT de suministro eléctrico (PLC Power Line Communication ). Las distintas modalidades de PLC se clasifican en función del rango de frecuencias utilizadas. Clasificación por ancho de banda: • UNB-PLC ( UltraNarrowband PLC) Banda ultra-estrecha. • NB-PLC ( Narrowband PLC) Banda estrecha. • BB-PLC ( Broadband PLC) Banda ancha. Ilustración 100. Clasificación por ancho de banda. Ilustración 101. Aplicaciones de banda estrecha. PRIME
V1.4.
White
Paper According
to
the
simulation
results
performed
during
the
specification
definition
by
the
PRIME Technical
Working
Group
members,
the
robust
DBPSK
mode
permits
to
enhance
the
system
performance of
about
4
dB
in
case
of
additive
white
Gaussian
noise
permitting
a
reliable
communication
with
a
signal-‐to-‐ noise
power
ratio
of
0
dB
(1%
of
frame
error
r te
with
a
payload
of
256
Bytes).
The
performance enhancement
is
much
higher
in
more
disruptive
scenarios.
For
example,
in
the
case
of
a
notched
channel,
a performance
gain
higher
than
6
dB
has
been
measured
and
in
case
of
impulsive
noises,
a
maximum
gain
of 14.5
dB
was
achieved.
These
results
were
based
on
the
measured
channels
in
electrical
grids
from
PRIME Technical
Working
Group. 2.3 FCC/ARIB
frequency
band
extension The
PHY
of
PRIME
originally
specified
an
OFDM
modulation
scheme
in
the
CENELEC
A
band
(3
kHz up
to
95
kHz),
which
is
intended
for
distribution
grid
operations
according
to
EN
50065-‐1.
The
successful adoption
of
PRIME
technology
in
many
CENELEC
regulated
countries
has
provoked
an
increasing
demand outside
Europe
with
the
consequent
evolution
of
the
specification. PRIME
v1.4
extends
the
system
band
up
to
500
kHz,
multiplying
by
eight
the
bandwidth
originally available.
The
use
of
this
extended
frequency
range
is
subject
to
applicable
local
regulations,
e.g.
EN
50065-‐ 1
in
Europe,
or
FCC
part
15
in
the
US. 2.3.1 Concept PRIME
v1.4
PHY
specification
uses
the
frequency
band
from
41.992
kHz
to
471.6796875
kHz.
This range
is
divided
into
eight
channels,
which
may
be
used
either
as
single
independent
channels
or
“NCH”
of them
concurrently
as
a
unique
transmission
/
reception
band.
Figure
5
shows
PRIME
v1.4
channel allocation. Ch1 Ch2 Ch3 Ch4 Ch5 Ch6 Ch7 Ch8 CENELEC A, [3..95] kHz CENELEC BCD, [95..148.5] kHz ARIB, [10..450] kHz FCC, [10..490] kHz 42 97 144 151 198 206 253 261 308 315 362 370 417 424 471 89 [kHz]: 7.3 kHz 7.3 kHz 7.3 kHz 7.3 kHz 7.3 kHz 7.3 kHz 7.3 kHz Figure
5
-‐
PRIME
v1.4
FCC
/
ARIB
frequency
band
extension OFDM
modulation
is
specified
in
each
channel,
with
data
signal
loaded
on
97
equally
spaced subcarriers,
transmitted
in
symbols
of
2240
us,
of
which
192
us
are
comprised
of
a
short
cyclic
prefix. Adjacent
channels
are
always
separated
by
guard
intervals
of
fifteen
subcarriers
(7.3
kHz). Fuente: https://www.prime-alliance.org/wp-content/uploads/2020/04/whitePaperPrimeV1p4_final.pdf
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