The
event
was
held
on
the
first
day
of
the
International
Specialized
Exhibition
“Electric
Network
of
Russia-2016”
initiated
by
management
of
Engineering
Company
Energoservis
LLC
with
organizational
involvement
of
Operation
and
Diagnostics
Service
LEP
PJSC
FSK
MES-Center
(headed
by
A.
V.
Eliseenko,
this
Service
is
a
base
for
RNC
CIGRE
2V
Subcommittee).
More
than
70
people
attended
the
Conference.
Such
attendance
of
the
Conference
shows
how
essential
it
is
to
have
field-specific
events
for
design
engineers
and
how
much
interest
the
new
types
of
wires
inspire.
At
the
Conference
there
were
representatives
of
the
following
organizations:
1)
reasearch
establishments
and
institutions
engaged
in
developing
a
new
generation
of
main
elements
for
overhead
high-voltage
line
structures
(OL);
2)
manufacturers
of
equipment
for
OL;
3)
companies
for
OL
operation
and
service
maintenance.
9
reports
were
read,
with
15
people
involved
in
ensuing
debates.
In
many
countries
of
the
world,
developers
offer
new
solutions
to
enhance
OL
reliability
and
transmission
capacity,
to
prolong
OL
service
life
and
to
reduce
time
for
troubleshooting
and
routine
repairs.
Some
of
these
solutions
have
been
tested
in
real
life,
others
have
not.
In
particular,
this
applies
to
a
new
grade
of
aluminum-steel
non-insulated
cables
of
ASVP
and
ASVT
type,
single-lay
with
linear
wire
crossing,
plastically
crimped
steel
and
aluminum
parts.
Initially,
these
products
were
developed
and
patented
by
Engineering
Company
Energoservis
LLC.
Research
of
corona-discharge
of
plastically
deformed
ASVP/ASVT
wires
and
comparative
tests
of
operational
drawing-down
of
conductors
in
accordance
with
the
same
technology
were
presented
at
the
Conference.
This
research
was
implemented
by
JSC
NTTs
FGC
UES.
It
was
conducted
in
compliance
with
a
decision
made
at
PSJC
FGC
UES
meeting.
V.
N.
Kurjanov,
Senior
Lecturer
in
Power
Engineering
and
Electrical
Engineering
of
MEI
Affiliate,
PH.D.
in
Technical
Sciences,
delivered
a
report
on
omparative
test
results
of
operational
drawing-down
and
corona-discharge
of
plastically
deformed
wires,
as
well
as
an
overview
of
design
solutions
using
the
above
products.
He
underlined
that
the
conducted
tests
proved
compliance
of
declared
mechanical
and
electrical
properties
of
plastically
crimped
ASVP/ASVT
wires
with
STO
71915393-TU
120-2012
requirements,
and
a
number
of
important
specifics: •
Experiments
show
that
the
operational
drawing-down
is
reduced
4–5
times
as
compared
to
standard
designs,
regardless
of
material
(steel,
aluminum
and
copper). •
Corona-discharge
inception
voltage
in
Energoservis
ASVP
wire
is
higher
than
that
of
AS
grade
wire
with
the
same
diameter,
meanwhile
ASVP
continuous
current-carrying
capacity
is
higher. •
New
wires
have
higher
transmission
capacity
(especially
for
a
high-temperature
design). •
In
the
“wire-accessories”
system,
wire
tensile
strength
parameters
exceed
similar
AS
parameters
virtually
twofold.
The
Conference
participants
involved
in
debates
on
the
delivered
report
observed
that
a
traditional
AS
wire
showed
good
results,
though
it
had
a
number
of
drawbacks
such
as
a
relatively
large
diameter,
rough
surface
and
a
rather
heavy
core.
New
wire
offered
by
Energoservis
solves
the
problem
of
enlarging
length
of
span,
however,
it
requires
additional
costs
to
increase
mechanical
strength
of
supports.
But
as
some
projects
reveal,
ASVP/ASVT
wires
generally
reduce
construction
costs
due
to
a
fewer
number
of
supports
and
life
cycle
costs
due
to
combined
electromechanical
properties.
To
obtain
required
temperature
resistance,
the
new
products
use
zirconium
alloys,
new
multiplex
technology,
innovative
design
of
the
core
and
the
wire
itself.
As
compared
to
AS
wire
with
the
same
strength,
ASVP/ASVT
wire
smaller
diameter
and
design
allow
reducing
loads
on
supports
by
decreasing
aerodynamic
and
ice
load
effects.
Higher
strength
helps
to
lessen
sag
of
conductors.
The
wires
allow
to
enhance
OL
transmission
capacity
up
to
1.5
times.
This
design
and
technology
are
protected
by
the
17
Russian
Federation
patents
(patent
priority
since
2013-2014),
and
the
production
technology
of
plastically
deformed
wire
is
protected
by
the
German
Patent
¹
DE102014101833.
The
product
costs
depend
on
many
aspects,
a
primary
one
being
a
large-scale
production,
which
in
its
turn
was
confirmed
by
Yu.
S.
Lyadov,
a
representative
of
Rusal,
a
manufacturer
of
aluminum
alloys.
In
his
report,
PH.D.
in
Technical
Sciences
A.
K.
Vlasov
gave
an
overview
of
research
activities
performed
by
Volgograd
State
Technical
University,
including
use
of
computerized
simulation
to
optimize
design
and
features
of
ASVP/ASVT
wires.
A
report
of
A.
V.
Zvyagintsev,
Chief
Expert
of
PSJC
FGC
UES
Innovative
Developement
Department,
covered
the
issue
of
bringing
PUE-7
standards
(Electrical
Installation
Code)
in
compliance
with
the
world
practice
of
installing
and
industrially
operating
improved-structure
(design)
tower
supports.
Up
to
now,
to
construct
and
reconstruct
OL,
Russia
still
uses
the
designs
of
supports
and
foundations
developed
in
1960–1970,
which
are
morally
outdated
and
fail
to
provide
required
reliability,
safety
and
aesthetic
appeal.
The
Conference
participants
involved
in
the
debates
believe
that
when
choosing
material
and
design
of
tower
supports
it
is
still
vital
to
consider
fatigue
and
durability
calculation
of
applied
grades
of
steel
and
non-metal
materials.
Reports
of
V.
I.
Mishin
(Marketing
Vice
President
Deputy,
Forenergo
LLC
PO)
and
S.
V.
Bobello
(Head
of
Overhead-line
Accessories
Department
Development
Group,
JSC
NTTs
Elektroseti)
were
devoted
to
a
special
use
of
compression
and
spiral
accessories
with
new
types
of
plastically
deformed
wires,
ground
wearers
and
OPGC.
A
principal
feature
of
this
accessory
type
is
that
it
includes
elements
directly
contacting
both
with
aluminum
and
steel
wire
parts,
redistributing
load
among
all
wire
elements.
Spiral
elements
with
rather
high
flexibility
combine
with
wire
well,
and
after
being
mounted
they
form
a
single
entity,
thus
additionally
creating
a
specific
protective
layer.
In
their
turn,
a
number
of
comprehensive
test
cycles
of
compression
accessories
together
with
ASVP
and
ASVT
prove
that
this
type
of
clamps
ensures
a
sustainable
operation
of
the
“wire-accessories”
system.
Bending
wire
stiffness
and
endurance
strength
increase,
resulting
in
wear
reduction.
One
of
areas
to
apply
the
above
design
is
anchorage
of
wires
in
large
crossings
when
required
bonding
and
wire
strength
are
essential.
In
S.
V.
Bobello’s
view,
spiral
type
accessories
are
quite
suitable
for
installing
plastically
deformed
ASVP
and
ASVT
wires.
For
illustration
purposes,
he
demonstrated
a
spiral
tension
clamp
made
of
several
spirals
joined
together.
Strand
inner
surface
is
coated
with
abrasive.
If
it
is
required
to
additionally
protect
wire
in
the
anchorage
area,
the
clamp
is
installed
on
a
pre-coiled
spiral
protector.
The
clamp
is
fixed
to
a
support
with
a
dead-eye
and standard
end
accessories.
Specified
wire
bonding
strength
in
the
clamp
is
min.
95
%
of
the
wire
tensile
strength.
The
debate
participants
raised
their
highest
fears
for
tension
clamps
which
shall
meet
PUE-7
requirements
in
terms
of
wire
bonding
strength
in
clamps
at
low-frequency
vibrations
(from
3
to
10
Hz).
These
objections
were
withdrawn
by
presented
results
of
independent
tests
with
various
accessories
types. Reports
of
R.
Z.
Kaverina
(Head
of
JSC
Firma
OGRES
OL
Engineering
Center)
and
S.
V.
Trophimov
(Senior
Researcher,
JSC
NTTs
FGC
UES)
addressed
the
issue
of
protecting
wires
and
ground
wearers
against
vibration.
Wires
and
ground
wearers
used
in
overhead
electric
lines
have
inner
diameter
from
8
to
47
mm,
their
dangerous
frequency
range
is
from
4
to
150
Hz.
R.
Z.
Kaverina
believes
that
it
is
difficult,
if
possible
at
all,
to
develop
dampers
to
ensure
effective
damping
of
wire
vibrations
within
such
a
wide
frequency
range
and
with
a
minimum
number
of
standard
sizes.
Wire
vibration
is
most
dangerous
in
case
of
riming.
Usually
rime
is
deposited
when
air
is
very
still,
preserving
a
cylindrical
form
of
the
wire,
but
significantly
increasing
its
diameter.
Wire
diameter
is
increased
without
any
perceptible
damping
change
so
that
wind
with
the
same
speed
will
cause
vibration
at
a
lower
frequency.
In
such
conditions,
dampers
within
their
normal
operating
range
cannot
handle
increased
received
wind
energy.
Eventually,
this
leads
to
wire
fatigue
failure,
accessories
damage
and
OL
emergency
disconnection.
According
to
S.
V.
Trophimov,
vibration
dampers
will
cope
with
their
task
much
more
successfully,
if
wire
vibration
do
not
coincide
with
dampers’
own
frequency
related
to
vibrations
due
to
a
damping
element
bend.
Then
he
demonstrated
a
device
intended
to
distribute
the
dampers’
own
vibration
frequency
equally
along
the
entire
operating
frequency
range.
This
device
consists
of
three
main
elements: 1)
an
elastic
rod, 2)
a
clamp
aimed
at
fixing
the
elastic
rod
parallel
to
the
wire, 3)
two
weights,
each
of
them
is
stretched
out
along
its
longitudinal
axis
and
secured
in
its
middle
across
the
elastic
rod
at
one
of
its
ends. So
far
it
is
unknown
whether
this
device
will
be
used
in
our
OL.
All
depend
on
results
of
its
industrial
operation.
R.
S.
Kaverina
considers
it
necessary
to
develop
a
protection
framework
and
a
method
to
calculate
vibration
parameters
for
compacted
wires,
since
their
design
differs
significantly
from
ordinary
AS,
and
standard
hinging
and
designs
of
vibration
dampers
may
not
fit.
Report
of
S.
V.Kolosov,
JSC
Elektrosetstroyproekt
General
Director
Deputy
(Moscow)
covered
issues
of
developing
protective
and
functional
OL
wire
coatings
with
specified
physical,
chemical
and
operational
properties,
in
order
to
ensure
necessary
electrical
and
thermal
conductivity,
shielding
against
electromagnetic
impacts
and
ultraviolet
radiation.
In
the
report
debates
it
was
suggested
to
develop
as
soon
as
possible
OL
wire
which
surface
is
characterized
by
low
adhesion
to
water,
snow
and
ice,
thus
protecting
electric
power
lines
against
ice
and
snow
build-up.
Nordic
countries
already
use
OL
wire
adjusted
to
remove
ice
from
its
surface
by
Joule
heat.
This
wire
is
coated
with
material
capable
to
absorb
alternate
current
energy,
its
coating
is
thick
enough
to
generate
heat
and
melt
ice,
meanwhile
the
coating
is
located
between
an
electric
conductor
and
an
outer
conducting
shell.
ASVP/ASVT
wire
development,
final
adjustment
and
series
of
additional
research
and
tests
were
conducted
according
to
minutes
of
PJSC
Rosseti
and
PJSC
FGC
UES
workshops.
Results
presented
at
the
Conference
of
recent
research,
out
of
more
than
fifteen
projects,
give
a
comprehensive
reply
to
all
questions
raised
by
operating
companies.
The
Conference
participants
generally
agree
that
it
is
necessary
to
speed
up
work
in
the
area
of
technical
regulation
and
update
of
a
whole
range
of
standards
and
regulatory
documents,
taking
into
account
current
and
long-term
growth
of
the
power
grid
industry.
Complete
official
report:
http://www.cigre.ru/news/rnk/2471/
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