POWER and RE+ Tech Supp September 2022 - 39
SEPTEMBER 2022 | WWW.POWERMAG.COM
2. A worker installs a Laki Power monitoring
station on a power transmission line on
top of Alvik mountain in Norway. The line
is 1,000 meters, or 3,280 feet, above sea
level. Courtesy: Laki Power
put, which he characterized as having
as much as 100 times greater efficiency
than other on-market monitoring
solutions. It could in practice enable
a range of energy-intensive peripheral
systems, he said.
Knudsen noted several attributes of
Laki Power's system, telling POWER,
" I just think more than anything that
we can cut down on maintenance by
offering a robust system that is completely
self-sufficient
and
therefore
much more economical. " Knudsen
said there is " added complexity and
costs associated with external power
sources-solar panels get covered in
snow and dust, wind is intermittent,
diesel generators are expensive and
need fossil fuel, and fuel cells can be
expensive and need maintenance. "
He said that while a Laki Power monitoring
station " could potentially be
significantly cheaper that solutions relying
on external power, I will say that
our goal is not necessarily to be the
cheapest solution, but the best one. "
Knudsen said PowerGRAB is not
affected by fluctuations in the phase
wire current flow, making it well-suited
for sensitive surveillance and measurement
devices. It can provide real-time
environmental monitoring and thermal
event detection to help spot wildfires,
a build-up of ice on power lines, and
also provide information about dynamic
line rating. The technology is part of
Laki's LKX MULTI system, which is " essentially
the monitoring station we've
used in our pilots with improvements,
3. A view of ice on the power lines and
snow on Ã…lvik mountain in Norway, taken
with a Laki Power monitoring device.
Courtesy: Laki Power
an improvement on the LKX-201, " said
Knudsen, noting it's best used to determine
" icing, vibration and galloping,
salinity measurements, and sag/
ground-clearance calculations. "
The system has been deployed in
Iceland with Landsnet, the country's
transmission system operator. Iceland
has a problem with a build-up of ice
on the power lines, as does Norway-
where Statnett,
that country's
transmission
line operator, in 2020 installed
a Laki Power monitoring station 1,000
meters (3,280 feet) above sea level on
Alvik mountain to monitor icing on
power lines in the remote location (Figure
2). The area is highly exposed to foul
weather blowing in off the fjord, which
creates perfect conditions for ice accumulation
(Figure 3) on towers, shield
wires, and phase conductors. Statnett
has traditionally used two methods to
remove ice: flying a helicopter to a site
to knock ice off the line with a wooden
pole or heating the power lines with
increased current, which has been the
preferred method. But either method
only works well if the line has a small
amount of ice, so an early warning of
ice build-up is needed.
Statnett had monitoring devices for
its lines, but it needed to use external
power sources like diesel generators
and solar power. The group recognized
the benefits of a self-powered sensor
system such as Laki's. " Being able to
utilize the conductor current to power
the monitoring devices is a huge benefit, "
said Miroslav Radojcic, project
manager at Statnett. " It reduces costs
and provides us with accurate data and
a unique viewpoint since the Laki Powwww.re-plus.com
er
station is on the conductor itself. "
Laki Power also has worked with
Manitoba Hydro, a group that began
testing line sensors in 2006, and over
the years has used a variety of technologies
with varied success in an
often-harsh environment of northern
Canada. Manitoba Hydro and Laki
Power began a pilot project earlier this
year, part of Manitoba Hydro's effort
to effectively monitor and respond to
icing and other weather events on the
company's transmission lines. Knudsen
told POWER, " We just finished two installations
with Manitoba Hydro on live
lines ... [and] that's a huge win for us. "
Knudsen also noted the deployment
of his company's technology in Greece,
begun in May of this year in partnership
with ipto, the country's independent
power transmission operator. Laki is
using its LKX SURV model, which relies
on a camera and sensors to help detect
excessive heat, or evidence of a wildfire.
Knudsen said the LKX SURV model
is " essentially an improvement on the
LKX THERMAL prototype, [as] we're
adding a rotating housing ... it's for
wildfire detection and can be used for
surveillance purposes. "
Greece has suffered through numerous
wildfires in recent years, and as
recently as this past June a fire raged
through a southern suburb of Athens.
The summer of 2021 saw Greece's most
severe heat wave in decades, and fires
destroyed nearly 250,000 acres of farmland
and forest. It was the worst wildfire
season in Greece since 2007.
" Wildfires are a huge issue in
Greece, as they are in California and
the western U.S., " said Knudsen. " We
can go in, put sensors on new or existing
power lines, provide more security.
I think we're unique in getting so much
data and HD [high-definition] images
and video into such a compact unit
that can be installed in 15 minutes.
This is evolving technology and we
want to be out in front of it. " n
-Darrell Proctor is a senior
associate editor for POWER
(@POWERmagazine).
39
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POWER and RE+ Tech Supp September 2022
Table of Contents for the Digital Edition of POWER and RE+ Tech Supp September 2022
POWER and RE+ Tech Supp September 2022 - Cover1
POWER and RE+ Tech Supp September 2022 - Cover2
POWER and RE+ Tech Supp September 2022 - 1
POWER and RE+ Tech Supp September 2022 - 2
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POWER and RE+ Tech Supp September 2022 - Cover3
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