Energy and Power Industries Worldwide to Benefit from Vaisala's Enhanced High Current Winter Lightning Detection Capability
(Thomson Reuters ONE) -
(Helsinki, Finland, 16 July 2010) Electric power transmission systems depend
increasingly on lightning location information in the design, monitoring and
maintenance of their operations. High current lightning strokes are a
significant threat to the dependability of electric power transmission, because
they can do severe damage to power lines. Being able to detect and locate these
events means savings in both time and money as the fault locations can be found
more quickly, and electricity can be re-routed to a different path.
In Japan, lightning events along the coast of the Sea of Japan during the winter
months emit particularly different waveforms than the majority of other
lightning events, which makes them hard to detect or classify properly. To
address this problem, Vaisala has worked together with Tohoku Electric Power
Company and Sankosha Corporation to develop improved lightning sensor software.
The result of the joint R&D effort is the Vaisala Thunderstorm CG Enhanced
Lightning Sensor LS7001, which delivers double the detection accuracy of high
peak current winter lightning discharges compared to older sensors.
New Parameters to Detect Different Electromagnetic Waveforms
The significant improvement in the high amplitude detection performance was
achieved by studying electromagnetic waveforms generated by winter lightning and
then developing new parameters for their detection. The LS7001 is able to
continuously sample and process detected signals eliminating the dead time
problems of previous sensor generations. Enhanced self-test and calibration
capabilities permit the simulation of more complex waveforms and help achieve a
significant improvement in stroke time measurements.
As a part of the cooperative research project, a six sensor network of LS7001
sensors was deployed in the Tohoku region during the 2009/2010 winter lightning
season. Data from Lightning Electromagnetic Pulse (LEMP) recording equipment
operated by Tohoku Electric Power Company and information from lightning caused
failures in Tohoku's transmission line systems demonstrated significant
improvements in lightning detection performance (*).
The project will continue through the 2010/2011 winter lightning season. The
algorithm updates employed in the reprocessing will be implemented in sensor
software, which will be downloadable into most existing LS sensors, making
improved detection performance available for energy and power industries around
the world.
For more information please contact:
Nikki Hembury
Product Manager, Thunderstorm Systems
tel. +1-520-248-9860,nikki.hembury(at)vaisala.com
Nicholas Wilson
Regional Market Segment Manager, Weather Critical Energy
tel. +49 172 4424265,nic.wilson(at)vaisala.com
(*) Improved Detection of Winter Lightning in the Tohoku Region of Japan using
Vaisala's LS700x Technology. Cummins, K.L., Pifer, A.E., Pezze, M., Rogers, T.,
Honma, N., and Tatsumi, M. Paper presented at the ILDC 2010 - 21st International
Lightning Detection Conference (www.vaisala.com/ildcilmc).
About Tohoku Electric Power Company
Tohoku Electric Power Co., Inc. was established in 1951 and supplies electricity
to approximately 7.7 million customers throughout the seven prefectures of the
Tohoku region. The Company's electric power sales in fiscal 2008 amounted to
81,101 kWh, equivalent to that of Belgium, ranking it fifth among the 10
Japanese electric power companies.www.tohoku-epco.co.jp/index-e.htm
About Sankosha Corporation
Since its establishment in 1930 and early days as a manufacturer of gas tube
arresters and protective devices for telecommunication systems, Sankosha
Corporation has continuously evolved in response to the changing needs of
society. Established as a lightning and weather information company with a
nationwide network for monitoring lightning strikes, Sankosha Corporation
continues to provide cutting-edge technology and safety to advanced information
society.www.sankosha.co.jp/eng/
About Vaisala
Vaisala is a global leader in environmental and industrial measurement. Building
on more than 70 years of experience, Vaisala contributes to a better quality of
life by providing a comprehensive range of innovative observation and
measurement products and services for meteorology, weather critical operations
and controlled environments. Headquartered in Finland, Vaisala employs over
1400 professionals worldwide and is listed on the NASDAQ OMX
Helsinki.www.vaisala.com
[HUG#1432193]
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Source: Vaisala Oyj via Thomson Reuters ONE
Unternehmensinformation / Kurzprofil:
Datum: 16.07.2010 - 08:25 Uhr
Sprache: Deutsch
News-ID 24021
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