Case Studies for Industrial Distributed Temperature Sensing in Electrical Transmission and Distribution Systems

LIOS Technology is actively deploying its DTS sensor technology in various industrial applications and has already equipped successfully more than 2000 permanent system installations worldwide. Today we highlight some projects in Power Cable and Transmission Line Monitoring in the following case studies.

Industrial Application: High Voltage Power Cable Monitoring – Smartgrid

		Beijing: Long Distance Cable Temperature Monitoring System for the Olympic City 2008 Beijing This project was the premiere of a successful cooperation between Brugg Cables and LIOS Technology. Both partners are currently developing further projects for power cable monitoring even with integrated dynamic rating systems (RTTR).

		Burbo Offshore Windfarm – Distributed Temperature Monitoring of Long Distance Submarine Cables Distributed temperature sensing (DTS) of long distance power cables is shown to provide valuable information for cable design optimisation and proper operation of wind farms. The long range sensing is enabled by using the Raman-OFDR (optical frequency domain reflectometry) technology in single-mode fibres. Raman-OFDR uses a modulated continuous wave laser for detection. The low peak power minimizes stimulated Raman-scattering in single-mode fibres making accurate temperature sensing over long distances feasible.

		Graz: Reliable Energy Supply for Graz, Austria The new cable installation is one of the city’s main transmission lines and is heavily loaded. In order to optimize the transmission performance and to guarantee its secure reliability, the cable installation has been equipped with large scale cross-bonding systems at its sheath. In addition, by the help of the LIOS temperature monitoring system (DTS), the level of backup capacity can be assessed.

Real-Time Cable Thermal Rating (RTTR) went on-line at a tunnel near Stockholm, Sweden In October 2006 the commissioning of the integrated condition monitoring system (CMS) for real-time monitoring of cables was successfully completed. Together with a Distributed Temperature Sensor (DTS) a parallel run of cables installed in a tunnel near Stockholm (Sweden) is being continuously rated by RTTR.

Highest DTS Installation Completed in Chile

LIOS Technology has completed a power cable monitoring project at a South American mining facility of Codelco in Chile. The Korean made 220 kV, 630 mm ² XLPE high voltage cable system includes  fibre optics in metal tube (FIMT) and supplies pumps, SAG mills (Semi-Autogenous Grinding) and other grinding equipment.

The Distributed Temperature Sensing (DTS) condition monitoring system is installed at the control room at 3500 m above sea level providing continuous thermal assessment of the highly loaded power circuit. Among LIOS Technology’s more than 2000 permanent DTS installations this is certainly the one at highest altitude.

Read more:

	Impressive track record of more than 2000 installations in permanent operation
	Smart Grid: Real time ampacity predictions of power cable and aerial line installations
	Distributed temperature monitoring of power cables

температурный мониторинг: Надежность и безопасность электросетей под постоянным контролем

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Один из способов обеспечения надежной работы кабельной системы в городских условиях — это мониторинг температуры фаз кабеля по всей длине. Необходимость применения системы мониторинга распределенной температуры КЛ, подтверждается опытом западных коллег и требованиями к эксплуатации КЛ в современных мегаполисах.

Такая система помогает эксплуатационным организациям в решении
следующих задач:

• снижение количества перебоев в электроснабжении или системных аварий;
• оперативное реагирование на возникающие перегрузки;
• выявление скрытых резервов существующих мощностей (увеличение нагрузки без превышения допустимой температуры)
• прогнозирование срока эксплуатации и др.

Пропускная способность кабеля ограничивается допустимой температурой нагрева жилы. Однако влияние на рабочие показатели системы ока

зывают и другие факторы, такие как условия прокладки (тепловое сопротивление грунта, температура грунта, расстояние до соседних кабелей и других источников тепла, находящиеся поблизости и т.д.). На разных участках трассы при протекании одного и того же тока, температура токопроводящей жилы может отличаться. Ключевым элементом современных систем распределенного измерения температуры кабеля стало оптическое волокно.

«КАБЕЛЬ-news», март 2010

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• Инновационная система комплексной диагностики КЛ
• Смотреть видео: Инновационная система комплексной диагностики КЛ / Распределительный сетевой комплекс: состояние, проблемы, пути решения

Russia Ready for Modernising its Electrical Distribution Network – Global Condition Monitoring Presented at MRSK Conference

MRSK Holding (internationally also known as JSC “IDGC Holding” – Interregional Distribution Grid Companies Holding) organised a well attended conference focusing on status, problems and solutions of the electrical distribution network of Russia which was collocated to the 17th International Specialized Exhibition “Energetika + Elektrotechnika  – 2010” on power and electrical engineering taking place in Saint Petersburg, Russia from 11 – 14 May 2010.

The conference initiated by MRSK Holding was officially supported by the Ministry of Economic Development and Trade of the Russian Federation, Ministry of Power Industry of the Russian Federation, Saint-Petersburg Government, the Government of the Leningrad region, Legislative Court of the Leningrad region and the Regional Office of the  Federal Energy Agency in the North-West federal region and attended by over 400 people.

Among them, high ranking management representatives of Russian grid operators and companies involved in the energy sector as well as from major international companies like EDF, ERDF, Schneider Electric and Nexans.

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In total 13 technical reports were presented in front of chief engineers and technical specialists of MRSK’s operating subsidiaries covering the broad scope from the current status of the Russian distribution network with its challenging tasks up to innovative solutions for modern asset management of the grid of the future.

LIOS Technology and its Russian partner Systec Cables were proud to be part of this honourable event and in the position to present its Global Condition Monitoring System – a comprehensive “health package” for the online assessment of critical operation factors like thermal load and partial discharge levels along the electrical grid structure. The presented solution provides answers for save and most efficient grid operation. This complemented combination of DTS and PD solutions provides grid owners an even better control and monitoring possibility of their grids. Together withReal Time Thermal Rating (RTTR), a platform has been created for a complete scope of condition assessment, control, monitoring and ampacity predictions.

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The key note of the presentation by LIOS and Systec to aim for maximising the grid availability and condition based maintenance was in line with a statement by the MRSK’s head of technical development and management Dmitry Medvedev at this conference who said that one of the main requirements for a modern electric grid equipment is the mandatory use of new technologies in order to reduce unit costs and improve performance of network elements.

Read more:

• Distributed temperature monitoring of power cables
• Watch video / Смотреть видео: Инновационная система комплексной диагностики КЛ
• Конференция Холдинга МРСК
• Конференция «Распределительный сетевой комплекс России: состояние, проблемы, пути решения» может стать ежегодной
• «Энергетика и Электротехника» в павильоне №7, 8А выставочного комплекса «Ленэкспо» (г. Санкт-Петербург)
• Инновационная система комплексной диагностики КЛ
• Распределительный сетевой комплекс РФ: состояние, проблемы, пути решения

Monitoring System for Overhead Line Conductors. Meeting the demands of a changing power environment

Providing sufficient electrical power reliably requires ongoing monitoring of temperatures within overhead transmission lines that are more susceptible to atmospheric changes than buried cables.  Winds, direct sunshine, ambient temperature, rain, ice and snow all affect the temperature of exposed overhead lines and can dramatically impact load limits they are capable of carrying. The fibre optic monitoring system for overhead lines is an inexpensive and highly reliable method that enables real-time monitoring of an entire network or of selected critical spans.

The easy-to-install, low-maintenance system offers a multitude of advantages. By enabling dynamic analysis of network structure, it increases the overall safety and reliability of the grid. It facilitates applying dynamic reactions to transmission requests, resulting in more flexible capacity and revenue management in both the short and long term. And the potential for cost-savings is enormous: downtimes and blackouts can be avoided, and the need for new lines and upgrades (e.g. increasing the height of overhead transmission lines) can be greatly reduced.

Customers dynamically rating the critical spans of their overhead line system can also increase earnings by activating previously unused resources in existing power lines. Dynamic metering of grid capacity and maximized transmission capacity make it possible to respond quickly and dynamically to transmission requests. As new sources of energy are added to the grid, precise load predictions are possible and it is easier to react quickly to overload conditions.

With the help of dynamic network-structure analysis, temperature profile can be monitored over span fields and fittings, depending on the length of the sensor. Load parameters are bundled and transmitted to network control stations online, allowing for real time thermal rating – which means real time supervision of network capacity. This makes it possible to predict load precisely and to avoid wire fatigue caused by repeated high thermal loads. Because decisions based on thermal load often influence upgrading or installation of lines, this translates into better control of grid and wire conditions, as well as optimal sag control and line clearance without requiring new construction activities.

Middle East Electricity 2010 is now open – VISIT TODAY

Middle East Electricity, now in its 35th year, is rated by visitors and exhibitors as the leading energy event of its kind anywhere in the world.

Despite the continued international economic slowdown, the Middle East’s significance to companies involved in the global energy industry has continued to grow.

Middle East Electricity 2010 is now open – VISIT TODAY

LIOS booth number: D20 in hall 1

Opening hours:

Tuesday 9 February: 10.30am – 6.00pm
Wednesday 10 & Thursday 11 February: 10.00am – 6.00pm
Halls 1 – 8 and Za’abeel Hall 3
Dubai International Exhibition Centre

In this show, we proudly present full range and latest Distributed Temperature Sensing (DTS) systems and Real Time Thermal Rating (RTTR) solutions for ampacity predictions of energy transmission and distribution assets, consolidating into global condition monitoring solutions:

• Full project engineering support during tendering and evaluation phase, commissioning and training on site as well as service and maintenance capabilities
• Highly reliable DTS systems with a range of up to 16 km at a single ended multi mode fibre and with a range of up to 30 km at a single ended single mode fibre
• Customised software solutions for power cable and aerial line real-time monitoring including data storage, visualisation, Dynamic Cable Rating (RTTR) and integration into SCADA systems
• Fibre optic sensor cables (dielectric), fibre in metal tubes FIMT
• Complete cabinet mounted industrial solutions for our fibre optic temperature sensing systems.

Our products are well introduced and accepted by the leading utilities, consultants, contractors and power cable manufacturers active in the Middle East.

LIOS is here to help you applying the latest global condition monitoring solutions for all of your energy transmission and distribution systems applications.

Counting down for Middle East Electricity – Explore Global Condition Monitoring Solutions in Dubai

It’s only a few days to go for Middle East Electricity 2010 to open at Dubai International Exhibition Centre. Even the floor plan was scrambled a bit recently you will still find LIOS Technology GmbH in hall 1 within the German section.

Our booth number: D20 in hall 1

Opening hours:

Tuesday 9 February: 10.30am – 6.00pm
Wednesday 10 & Thursday 11 February: 10.00am – 6.00pm
Halls 1 – 8 and Za’abeel Hall 3
Dubai International Exhibition Centre

In this show, we proudly present full range and latest Distributed Temperature Sensing (DTS) systems and Real Time Thermal Rating (RTTR) solutions for ampacity predictions of energy transmission and distribution assets, consolidating into global condition monitoring solutions:

• Full project engineering support during tendering and evaluation phase, commissioning and training on site as well as service and maintenance capabilities
• Highly reliable DTS systems with a range of up to 16 km at a single ended multi mode fibre and with a range of up to 30 km at a single ended single mode fibre
• Customised software solutions for power cable and aerial line real-time monitoring including data storage, visualisation, Dynamic Cable Rating (RTTR) and integration into SCADA systems
• Fibre optic sensor cables (dielectric), fibre in metal tubes FIMT
• Complete cabinet mounted industrial solutions for our fibre optic temperature sensing systems.

Our products are well introduced and accepted by the leading utilities, consultants, contractors and power cable manufacturers active in the Middle East.

LIOS is here to help you applying the latest global condition monitoring solutions for all of your energy transmission and distribution systems applications.

Read more:

• Smart Grid starts at TPC 345kV substation in Taiwan
• Head to Wind with DTS – US Renewable Energy Project Equipped with LIOS Condition Monitoring
• Dynamic wind farm load patterns recorded by long range DTS
• LIOS Condition Monitoring for High Voltage Cables at Industrial City Abu Dhabi

For further information on our monitoring solutions for energy transmission and distribution systems visit us at www.thermal-rating.com. For more information on Middle East Electricity 2010 visit www.middleeastelectricity.com

We look forward to seeing you in Dubai!

Interesting key note session at Transmission & Distribution Asia 2009 – Towards secure, sustainable and profitable energy delivery

Transmission & Distribution/ Smart Grids Asia 2009 is the premier transmission and distribution event for utilities in Asia. Based on six years of experience in organizing the successful Transmission & Distribution Europe conference & exhibition and the successful series of energy events in Asia including the Asian Energy Week in Beijing, Bangkok and Kuala Lumpur, Transmission & Distribution Asia 2009 will offer a targeted platform to gain in-depth insights into the drivers of the Asian Utility industry to invest in new transmission and distribution and smart grids systems and solutions. The international nature of the event provides an unprecedented opportunity for delegates and speakers to share experiences from different geographical perspectives.

Anticipating over 35 speakers and 200 participants, Transmission & Distribution/ Smart Grids Asia will address the key challenges Asian distribution utilities are facing today such as:

• Soaring electricity demand
• Finding sources for investments for power transmission projects
• Reducing alarmingly high system losses
• Balancing the need of increasing generation of renewable energy and integrating it on the grids
• Acquiring knowledge and technology to embark on smart grid initiatives
• Managing a consistent quality and reliability of power supply

These are just the tip of the ice-berg issues the utility industry in Asia is grappling with and against this backdrop, Transmission & Distribution/ Smart Grids Asia will bring together experts from all over the world to address the latest T&D industry trends, challenges and experiences.

Condition Monitoring of high voltage cables: Turning information into extra capacity

Increasing demand for power is forcing power utilities to load power cables to their physical limit, and safety and efficiency concerns are making it more and more critical for operators to understand what is happening thermally both inside the cables themselves, and along the cable route.

Real Time Determination of Thermal Conditions along HV Power Cable Systems
During high-load conditions and under emergency circumstances (such as when a failure occurs in a segment of the grid and power must be shifted to other sections to compensate) it often becomes necessary to load cables right up to the limits permitted by the relevant regulations. In these operational situations, it must be ensured that maximum temperature limits are not exceeded. Due to the increasing complexity of the thermal relationships along cable routes, the ability to continuously measure the temperatures along the cable has proven invaluable, providing critical operational data to engineers, especially in the case of a system faults such as a hot spots that could result in cable failure if they are not corrected.

The intrinsic temperature measuring system DTS based on LIOS Technology’s design, with fibre optic sensors either installed within the power cable’s cross section (FIMT – Fibre in metal tube ) or attached to the exterior of the cable, makes it possible to record the temperature profile along an entire cable route continuously, and to pinpoint the exact location of hot spots within a metre. Since the measuring principle employed is purely optical, the presence of electromagnetic influences, which can result in false sensor signals in other technologies, does not affect the DTS unit.

Distributed temperature sensing is a powerful tool that allows the accurate rating of high voltage power cables in real time, and provides the following operating benefits:

• Reduce power outages or blackouts
• Ensure continuity of supply
• Activate hidden capacity reserves of existing assets
• React quickly to overload conditions
• Conduct precisely and in real-time load predictions as new sources of energy are added to the grid

The temperature profile data, in any desired form or format, can be transmitted via standard interfaces from systems of the OTS product series as required, and be either displayed or further processed by PC, PLC or SCADA systems. As a result of the increasing demands placed on the ability to network and integrate measuring systems into management systems, LIOS offers network components that summarise DTS data from several DTS units and transport or convert it to the required network standards and protocols like Modbus, DNP3, IEC60870-5 or XML based data interfaces.

Dynamic Cable Rating
LIOS also provides an integrated Real Time Thermal Rating (RTTR) package via a well defined interface between its DTS data visualisation software and a commercialised – the industry’s de facto standard – cable ampacity program based on IEC standardised methods (mainly IEC 60287 and IEC 60853). Dynamic rating software couples the accurate temperature data provided by the DTS unit to predictive functions of cable ratings, providing engineers with even more information upon which they can base distribution and load decisions. The result is dramatically more efficient transmission of power, fewer “brown-outs”, and decreased operating costs.

Electricity for all, the smart way – visit LIOS at Power Indonesia 2009

LIOS Technology GmbH- Linear Optical Sensors is pleased to invite you to attend Power Indonesia 2009 – the 14th International Power Generation, Transmission and Distribution Exhibition, taking place 14-17 October at the Jakarta International Expo, Kemayoran.

Booth number: A340

In cooperation with our partner Anugrah Mitra International & Anugrah Mira Nusantara we proudly present continuous and cost-effective monitoring solutions for the electric transmission and distribution grid, which are the essential success factors of Smart Grid implementations.

The LIOS DTS product line comprises a range of real-time fibre optic based linear temperature measuring devices (Distributed Temperature Sensing, DTS). LIOS offers Real Time Thermal Rating/ Dynamic Cable Rating (RTTR/ DCR) solutions for ampacity predictions of the power cable and overhead transmission line installation transparently integrated with its field proven DTS systems.

The Electric Indonesia Series 2009 provides a one stop shop for the major elements in the development of the country’s electrical sector. For power generation, transmission and distribution Power Indonesia is South East Asia‘s most comprehensive exhibition.
This year over 600 companies from 34 countries will participate showing the huge potential in Indonesia’s Power and Electric Industries. Regional & National Pavilions from Taiwan, Korea, Germany, Czech Republic, Spain, Italy, Singapore, UK, and China will showcase the latest technology and equipment to help meet the countries huge demand for additional power.
Under its vision “Electricity for all”, the Government is currently planning to increase power generation by 35,000MW by 2015 at an investment of over US$40Billion.

We look forward to seeing you in Jakarta!

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	For more information on Power Indonesia 2009 click here
	Distributed temperature monitoring of power cables