Expanding Commitment to Ensure Reliability and Performance of Electric Transmission and Distribution Systems

LIOS Technology has a rich experience in applying its distributed temperature sensing systems to various industrial applications. Power cable monitoring projects at transmission and distribution levels are an essential part of our business. With more than 10 years of experience and more than 2500 DTS systems in permanent operation world wide LIOS Technology is in a unique position.
EN.SURE is LIOS’ continuous and cost-effective monitoring solution of the electric power transmission and distribution grid and is the key factor for a successful Smart Grid implementation.
Following a global trend also our customers in the USA are expanding their commitment to ensuring the reliability and performance of the transmission and distribution systems they operate. LIOS EN.SURE supports that commitment and is the flexible solution for underground high voltage cables, overhead transmission lines and submarine cables as well as for array cables within on and offshore wind farm installations.
Please find below some examples of recent EN.SURE installations in North America.
 
Utility in the Northwest of the USA, 115kV U/G transmission line

• 1 circuit of 115kV 2,500kcmil (i.e. 1,250mm²) Cu insulated (XLPE) cable of approximately 4km long
• 1  DTS monitoring system (4km, 1 channel, multimode 50/125µm) to monitor <1km at="" cable="" li="" of="" this="" time="">
• Fibre optic sensor cable ( metal free FRNC, 4 multimode fibres ) installed in a separate duct
• Direct DTS data interface with Virtual Machine for temperature data reading
• DTS commissioning in June 2012

 

 

 

 

 

 

 

 

 

 

 




PowerSouth in Andalusia, AL, USA

• 115kV Wolf Bay Crossing U/G transmission line
• 1 circuit of 115kV 2,500mm² enamelled Cu insulated (XLPE) cable of approximately 2km long
• 1 DTS monitoring system (2km, 6 channel, multimode 50/125µm) to monitor HDD cable route
• Fibre optic sensor cable ( FIMT, stainless steel tube, 2 multimode fibres ) embedded in the power cable sheath  (copper wire shielding, corrugated stainless steel sheath)
• Direct DTS data interface with PowerSouth Virtual Machine for temperature data reading
• DTS commissioning in June 2013

 


 
 
 
 
 
 
Utility in the Northeast of the USA, 230kV U/G transmission line

• 2 circuits of 230kV 3,000kcmil (i.e. 1,500mm²) Cu pipe-type (HPFF) route length approximately 10km long.
• 1 DTS monitoring system (10km, 8 channel, multimode 50/125µm) to monitor ~10km of cable
• Fibre optic sensor cable (HDPE underground, 2 multimode fibres) installed in separate duct with temperature trees (at each end) for ambient temperature readings
• Direct DTS data interface with enhanced visualization and  Real Time Thermal Rating (RTTR) with Energy Management System (EMS) via DNP3 protocol
• DTS/RTTR commissioning in May 2013

 

 

 

 

 

 

 

 

 

Giải pháp công nghiệp về giám trắc nhiệt độ kiểu phân tán - Sản xuất tại Đức

Côngty TNHH Công nghệ LIOS, có trụ sở chính đặt tại Cologne - Đức, dẫn đầu toàn cầu trong lĩnh vực nghiên cứu, phát triển và sản xuất hệ cảm biến nhiệt kiểu phân tán miền quang tần tiên tiến nhất hiện nay. Ngoài việc đầu tư sáng tạo nghiên cứu về công nghiệp cảm biến sợi quang tuyến tính, chúng tôi còn cung cấp các giải pháp quản lý tài sản và phương án giám trắc điều kiện toàn bộ hiện đại theo yêu cầu của các khách hàng doanh nghiệp.


Hệthống cảm biến nhiệt kiểu phân tán (DTS) của Công ty TNHH Công nghệ LIOS, sử dụng sợi quang làm nguyên kiện cảm biến tuyến tính để đo nhiệt độ. Cảm biến nhiệt độ dọc tuyến cáp quang không chỉ bằng cách lấy mỗi điểm số liệu đơn lẻ, mà là ghi chép lại theo kiểu phân tán liên tục.

Distributed Temperature Sensing: Optimum Utilization of Energy Transmission Backbone in Eastern Europe

LIOS Technology successfully provided an integrated thermal monitoring solution for a strategically important interconnection aerial line in Eastern Europe.

The LIOS DTS system was supplied to provide distributed temperature measurement by means of a fibre integrated into a replaced optical phase conductor (OPPC). The picture above shows a straight joint of the OPPC.
The DTS covers the entire 17 km range of the three-core bundle 400kV transmission line. The applied Optical Frequency Domain Reflectometry (OFDR) principle ensures a temperature survey even over long distances at the decisive spatial resolution of 1 m.
It provides an invariant spatial resolution along the entire sensor length and a satisfactory temperature resolution of less than 1°C, which ensures early identification and clearly measurement of atypical hotspots (e.g. tower shadows). In addition to the phase conductor temperature, the electrical and metrological data are integral parameters for the established dynamic rating system (RTTR). All data are made online available through the SCADA system of the utility.
The integrated monitoring solution generates:

• Safety - Avoid and respond appropriately to critical load situations
• Optimization  - Utilize the existing grid capacity to an optimum
• Dynamic and Flexibility - With dynamic rating to a flexible energy backbone

Cigre Session 2012: Join 6000 Executives and Experts from the Worldwide Power Industry in Paris

LIOS Technology is pleased to cordially invite you to attend the CIGRE Technical Exhibition in Paris:

International Council on Large Electric Systems Technical Exhibition LIOS booth 232

27 - 31 AUGUST 2012, Palais des Congres de Paris, Paris, France 

 
LIOS Technology introduces its new EN.SURE DTS generation for Distributed Temperature Monitoring of Energy Transmission and Distribution Systems.
LIOS EN.SURE offers exact dynamic cable rating based on the real time temperature measurements along the entire cable circuit.
One single EN.SURE evaluation unit provides fast temperature sensing profiles with high spatial resolution along the optical fibre routes with monitoring ranges up to 40km per channel. It is the first maintenance free DTS which comes without any moving parts like fans or shutters.
 
» Register online for CIGRE Session 44 (technical exhibition included)
» Register online for CIGRE Technical Exhibition 

 

40 per Cent Increase in Power Transmission Capacity between Finland and Sweden

For two major North European utilities ( Fingrid Oyj and Svenska Kraftnät ) LIOS Technology provided its  most advanced multimode Distributed Temperature Sensing (DTS) systems to monitor the HVDC subsea link between the two utility grids. The electricity transmission connection is crossing the Gulf of Bothnia between southern Finland and Sweden.
The Fenno-Skan 2 HVDC project creates a new 800 MW, 500 kV subsea electricity transmission connection following a 200 km route.
It forms a bipolar arrangement with the existing 550 MW, 400 kV Fenno-Skan link, commissioned in 1989, providing a 40 % increase in power transmission capacity between the two countries.
The DTS systems provide real time distributed temperature sensing of the HVDC interconnecting subsea cable and land cables on both sides ensuring a save and stable grid operation.

International Workshop on Insulated Cables - in São Paulo, Brazil

 LIOS Technology GmbH- Linear Optical Sensors is pleased to invite you to attend the conference “ Redes Subterraneas De Energia Electrica 2011 ”, taking place in São Paulo, Brazil.
The Brazilian National Study Committee of Cigré B1 – Insulated Cables – is going to promote an International Workshop on Insulated Cables “ Workshop Internacional Sobre Cablos Eletricos ” , this year in São Paulo, Brazil.
The workshop taking place 20 – 22 June 2011, will be composed of short tutorials with international specialists on the following subjects:

• State of the art of technologies for maintenance of underground transmission lines (138 kV and above). The preferential methodologies that will be focused will be: measurement of partial discharges in field, detection and localization of small oil leakages in OF cables, and other maintenance edge technologies.
• Monitoring of underground transmission lines in real time: distributed temperature, current capacity, partial discharge, etc.
• Methods of calculation of magnetic fields of underground transmission lines and mitigation of magnetic fields generated by underground facilities.
• New technologies for high voltage cables and accessories: high-temperature superconductors, hybrid joints, Y joints, "plug in" joints and terminations.

LIOS Technology is participating with two tutorials captioned “New Technologies for Maintenance and Monitoring Systems of Insulated Cables” (Novas Tecnologias De Manutencao E Sistemas De Monitoramento De Cablos Isolados De AT) focusing on new trends for real time condition monitoring of insulated high voltage cables. Theoretical backgrounds as well as hands-on experience of recent projects serve as a base for interesting discussions with the Brazilian specialists on insulated cables.
  
Read more:

	Distributed Temperature Sensing
	Essential for Smart Grid: Distributed Temperature Sensing for Real Time Power Cable and Overhead Line Monitoring

私たちはあらゆるやり方で温度をとります。 – 光ファイバ温度分布計測システム – DTS

DTS（光ファイバ温度分布計測システム）

LIOS テクノロジー有限会社は、ドイツのケルンに拠点におく、国際的視野を持つダイナミックな会社です。 – NKT グループのメンバーです。LIOS は、分散温度監視システムに基づく最先端の周波数領域の開発と供給におけるグローバルリーダーです。 LIOSの 分散温度センサー(DTS) 製品ラインは、リニア温度測定器に基づくリアルタイム光ファイバーを有します。光ファイバーセンサー技術分野の革新的な開発を積み重ねながら、私たちは様 々な市場において、最新の資産運用及び世界的な状況監視のためのカスタマイズされたソリューションを提供しています。
 LIOSテクノロジー は、自社のDTS（光ファイバ温度分布計測システム）製品を様々なビジネスセグメントにおいて流通し、関連したアプリケーションや地理上の地域において、優勢なプレーヤーと提携してきています。LIOS テクノロジーは、積極的にセンサー技術を以下の垂直市場セグメントにおいて展開しています。 既に世界中で 2000以上の永久システム設置に成功しています。   :

• トンネルや特別危険建物の中での火災検知
• 高圧ケーブルとトランスミッションライン監視
• 石油ガスの探索-永久ダウンホール監視
• 産業用誘導電気炉の監視
• 液化天然ガスキャリアーとターミナルの完結性
• 堤防とダムでの漏水検知
• プラントと技術過程における温度監視 

テクノロジー
LIOS テクノロジーは、リニアセンサーとして機能する光ファイバ−によって温度を測定する分散温度センサー（ラマン DTS）システム を生産しています。温度はセンサーケーブルに沿って点ではなく、継続したプロファイルとして記録されます。測定時間は短いのですが、高精度な温度決定が長 距離であろうと広大な表面積であろうと、確実になされます。
 続きを読む ...

Real Time Condition Monitoring for Samsung Mobile Display’s New Production Line

Samsung Mobile Display Co., a venture between Samsung Electronics Co. and its sister unit Samsung SDI Co., are building a new plant that produces displays used in phone handsets and small televisions.
The plant in Asan city, 42 kilometres southwest of Seoul, South Korea, will be completed by July next year. Samsung Mobile Display plans to spend 2.5 trillion won (US$2.11 billion) on the plant.
The joint venture will produce active-matrix organic light-emitting diode (AM OLED) displays, which are used in portable devices such as mobile phones and small TVs.
LIOS Technology recently completed the installation of its real time condition monitoring system supervising three 154kV high voltage cable systems on site. Condition monitoring is based on LIOS’ Distributed Temperature Sensing (DTS) System OTS20P with a 16 channel fibre switch.
The distributed temperature profiles of the energy transmission systems made by Prysmian Cables & Systems are measured in real time by embedded fibre optics using FIMT . The DTS readings are visualised at the central control and dispatch centre ensuring save operation and allowing exploitation of the high voltage cable routes at full capacity potential.
(with material of Yonhap )

Distributed Temperature Sensing, the Motor for Tunnel Innovation and Safety in Croatia

Tunnels are sensitive traffic bottlenecks and consequently extraordinary vulnerable in case of accidents or fire blasts. Danger for life and enormous economic consequences ask also for technical solutions of prevention and limitation of damage.

LIOS Technology and its Croatian partner Tehnomobil have set a new standard for modern fire safety solutions for the road tunnel network in Croatia.

Croatia is located in South-Central Europe and shows diverse terrain, including: rolling hills in the continental north and northeast, densely wooded mountains and rocky coastlines on the Adriatic Sea. The highlight of Croatia's recent infrastructure developments is its rapidly growing highway network which puts focus on tunnels as well.

Tehnomobil’s excellent engineering and contracting background in traffic infrastructure and fire fighting industries perfectly match with LIOS Technology’s comprehensive experience in fire detection applications for tunnels and special hazard buildings with an impressive track record of more than 2000 installed fibre optic temperature sensing systems worldwide.

Best fire surveillance for more than 90 % of the road tunnels in Croatia

At present an impressive share of more than 90 % of the Croatian road tunnels are equipped with the fibre optic fire detection system by LIOS Technology. In 28 tunnels with in total 55 tunnel tubes the purely passive LIOS fibre optic line sensor cable has been installed by Tehnomobil for reliable and fast fire detection. Those tunnels with tube lengths ranging from 500m to almost 6000m were newly opened in recent years or re-opened after full refurbishments where the conventional line type fire detection system could be replaced by the fibre optic LIOS system. Within LIOS Technology’s long list of tunnel projects in Croatia it is worth to stress the tunnels Veliki Glozac and Brinje which received best scores at recent European tunnel safety rankings.

Read more:

• Optimum Safety in Tunnels and Special Hazard Buildings
• Distributed Temperature Sensing

Introduction to Distributed Temperature Sensing

Distributed Temperature Sensing Systems (DTS) are optoelectronic devices which measure temperatures by means of optical fibres functioning as linear sensors. Temperatures are recorded along the optical sensor cable, thus not at points, but as a continuous profile. A high accuracy of temperature determination is achieved over great distances.

Measuring Principle - Raman Effect
Physical measurement dimensions, such as temperature or pressure and tensile forces, can affect glass fibres and locally change the characteristics of light transmission in the fibre. As a result of the attenuation of the light in the quartz glass fibres through scattering, the location of an external physical effect can be determined so that the optical fibre can be employed as a linear sensor.

Optical fibres are made from doped quartz glass. Quartz glass is a form of silicon dioxide (SiO2) with amorphous solid structure. Thermal effects induce lattice oscillations within the solid. When light falls onto these thermally excited molecular oscillations, an interaction occurs between the light particles (photons) and the electrons of the molecule. Light scattering, also known as Raman scattering, occurs in the optical fibre. Unlike incident light, this scattered light undergoes a spectral shift by an amount equivalent to the resonance frequency of the lattice oscillation.

The light scattered back from the fibre optic therefore contains three different spectral shares:

• the Rayleigh scattering with the wavelength of the laser source used,
• the Stokes line components with the higher wavelength in which photons are generated, and
• the Anti-Stokes line components with a lower wavelength than the Rayleigh scattering, in which photons are destroyed.

The intensity of the so-called Anti-Stokes band is temperature-dependent, while the so-called Stokes band is practically independent of temperature. The local temperature of the optical fibre is derived from the ratio of the Anti-Stokes and Stokes light intensities.

Measuring Principle - OFDR Technology
Latest DTS evaluation units deploy the method of Optical Frequency Domain Reflectometry (OFDR) . The OFDR system provides information on the local characteristic when the backscatter signal detected during the entire measurement time is measured as a function of frequency in a complex fashion, and then subjected to Fourier transformation. The essential benefits of OFDR technology are the quasi continuous wave mode employed by the laser and the narrow-band detection of the optical back scatter signal, whereby a significantly higher signal to noise ratio is achieved than with conventional pulse technology (OTDR). This technical benefit allows the use of affordable semiconductor laser diodes and electronic assemblies for signal averaging.

The optical frequency domain reflectometry has been developed as a high-resolution measurement process for the characterisation of optical wave guides with length dimensions of just a few millimetres. In contrast, its application for the Raman backscatter measurement was introduced and patented by the company LIOS Technology.

Schematic system set up
The temperature measuring system consists of a controller (frequency generator, laser source, optical module, HF mixer, receiver and micro-processor unit) and a quartz glass fibre (fibre optic) as line-shaped temperature sensor.

The design is three-channel, since an additional reference channel is required besides the two measurement channels (Anti-Stokes and Stokes). Corresponding to the OFDR system, the power output of the laser runs through the sinus-shaped frequency starting from a starting frequency in the kilohertz range through the ending frequency in the high megahertz range within a measurement time interval with the help of the High Frequency (HF) modulator. The resulting frequency shift is a direct measurement of the local resolution of the reflectometer. The frequency-modulated laser light is connected to the fibre optic-sensor via the optical module.

The continuously back-scattered Raman light is spectrally filtered in the optical module and converted into electrical signals by means of photo detectors. Then the measurement signals are amplified and mixed in the Low Frequency spectral range (LF range). The Fourier transformation of the averaged LF signals results in the two Raman backscatter curves. The amplitudes of these backscatter curves are proportional to the intensity of the Raman scattering of the viewed location. The fibre temperature along the sensor cable results from the amplitude ratio of the two measurement channels.


High Reliability and Industrial Strength

The semiconductor laser diode has been thoroughly type tested according the Telcordia GR-468 standard. It fulfils telecom standards with a medium lifetime of more than 25 years. The entire system was comprehensively evaluated by various independent international bodies (e.g. the VdS, the association of German asset insurers) including EMC tests as well as endurance tests at accelerated aging environments. Field data of the huge installed base prove the exceptional high reliability of the controllers.

Read more...

Intelligent Well Completion - Special Focus on "World Oil" magazine

Right from the oil industry’s begin­ning, people wanted to know more about the reservoirs that they were exploiting. This included having a more sound un­derstanding about reservoir behaviour and obtaining knowledge on how to optimize hydrocarbon recovery. As it was, and still is, impossible to look directly into a res­ervoir, other ways to obtain information about it needed to be investigated. Direct surface measurements were helpful and are still required today, but downhole sensing quickly became an important topic for reservoir monitoring.

The first sensors were for pressure measurements and then temperature. Nowadays, micro-sensing images a whole ground section in 3D. A lot of in­formation can be derived from relatively easy temperature measurements along the borehole. The advances in fibre op­tics and packaging, and the experience gained over the last five to 10 years, has enabled the industry to deliver low-cost DTS systems. An additional factor has been further development of industry standards and electronics, enabling per­sonnel to build an architecture that al­lows data flow from the well to the pro­duction technologist’s desk.


Reprinted from: World Oil,  May 2007 issue, pgs 37–44.


Read more:

	Download complete "World Oil" article on permanent downhole temperature sensing
	Oil and gas well optimisation and reservoir performance improvement

Integrated Condition Monitoring for High Voltage Cables: Direct link to SCADA / substation automation

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.

Most commonly the measured temperature profile data is transmitted via standard interfaces from systems of the DTS 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 (e.g. POSC).

Equipped with the Embedded Communication Module (ECM) the Distributed Temperature Sensing (DTS) evaluation unit is accessible by Ethernet/ LAN, holds its own IP address and is compatible with DHCP.
The on-board storage facility of measurement data provides automatic buffering of network break downs. It can handle multiple protocols, so the DTS can be directly linked to PLC or SCADA systems and communicates in various industrial protocol standards providing measured data and customised alarm information.
Hereby, the evaluation unit communicates as a TCP /IP server with several clients.

Features of the embedded communication module of the LIOS DTS controller:

• Configuration and operation of the DTS via two independent channels:
  
  
  • RS232
  • Ethernet TCP/IP
  
  
• Onboard storage of measurement data
  
  
  • Buffers up to 72 hours of measurement data and initiates data transfer automatically after communication link was re-established
  • Individual file access to measurement data through CHARON_02 (onboard data storage 1 GB)
  
  
• Allows to operate individual Plug-In-Interfaces for customer specific protocol solutions
  
  
  • The DTS can communicate in parallel with its proprietary protocol and one or more customer specific protocols like DNP3, IEC60870-5-104, IEC61850, POSC WITSML, Modbus (Master/Slave) etc.
  • Individual assignments for protocols and client addresses (IP) possible
  
  
• Ethernet communication to and from clients with high bandwidth
• Module comes with built-in user configurable Firewall and enables reliable operation even in WAN’s
• Secure data transmission and individual authorisation according TLS- Standard (RFC 2246)

The most common industrial protocols used in electrical systems worldwide are introduced in the following section. However, also other protocol standards are available or can be implemented for the ECM. Please contact us in case of questions.

MODBUS
The MODBUS protocol was published by Modicon in 1979. It is a quite simple single master – multiple slave protocol widely used in general purpose SCADA applications. It provides binary (bit) and 16-bit integer data, but no floating point values, polled by the master, i.e. the slave cannot send data spontaneously. The protocol specification is openly published and royalty-free. In the DTS ECM, TCP/IP is used as transport layer.

IEC 60870-5
IEC 60870-5 provides a communication profile for sending basic Telecontrol messages between systems. It was developed by the IEC Technical Committee 57 (Working Group 03) as a protocol standard for Telecontrol, Teleprotection, and associated telecommunications for electric power systems. The result of this work is IEC 60870-5. The protocol provides inter alia bit, integer and floating point data with or without time stamps. Data is transmitted from controlled stations (slaves) either by polling or spontaneously. In the ECM the IEC 60870-5-104 companion standard, defining standard TCP/IP connections as transport layer, is used.

DNP3
DNP3 (Distributed Networking Protocol) is an open standard managed by the DNP User Group. Initially; the DNP3 protocol was developed by Westronic (now GE-Harris) in 1993. It is widely used in electrical systems worldwide, including North and South America, the UK, Southeast Asia, South Africa, Australia, and New Zealand. It has gained wider use beyond electrical utilities, e.g. for water supply as well. The DNP3 protocol is also referenced in IEEE Std. 1379-2000, which recommends a set of best practices for implementing modern SCADA Master-RTU/IED communication links.
The protocol provides bit, integer and floating point data and time stamps. Data is transmitted from the outstation (slave) either by polling or spontaneously. The ECM uses TCP/IP as transport layer, but even in this mode the DNP3 protocol additionally uses its own protocol stack for synchronisation and error checking. This provides extra security.

US Renewable Energy Project Equipped with Real Time Condition Monitoring

For one of the biggest American renewable energy companies LIOS provided its well recognized DTS system for monitoring the temperature of two medium voltage power cables directly buried coming from a wind turbine towards the substation. All asset condition monitoring data from the controller is linked in real time by means of Modbus communication protocol to the operator’s SCADA system. The company is convinced by using DTS it has a better control over the thermal cable conditions thus over the load of the power cables which let it utilize its assets more economically. This is a great step for LIOS Technology to strengthen its position in USA for temperature monitoring of power cables at wind farms together with the recently opened office in Morganville, New Jersey.
 Read more:

	Smart Grid: Real time ampacity predictions of power cable and aerial line installations
	Distributed temperature monitoring of power cables

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.

DTS support for Steam Assisted Gravity Drainage (SAGD)

Accurate, continual, and real-time temperature reading along the well path can give you valuable information about the condition of both the reservoir and downhole completion provided by LIOS distributed temperature sensing (DTS). This enables you to adjust parameters and schedule maintenance for maximum hydrocarbon production and minimize downtime.

[caption id="" align="aligncenter" width="500" caption="DTS support for Steam Assisted Gravity Drainage (SAGD)"][/caption]

DTS Temperature readings allow you to:

• Enhance oil and gas recovery
• Increase production yields
• Track well production changes over time
• Reduce frequency of well interventions
• Improve reservoir management strategies
• Supply in-flow distribution along the reservoir
• Detect early water, steam (SAGD), or gas breakthrough and its location
• Observe steam flooding performance
• Verify and allocate cross flow
• Determine skin factor
• Check integrity of casing and completion
• Monitor and optimize gas lift valve operation
• Detect stuck or leaky valves, perforation inflow, porous insulation, wax deposits, hydrate precipitation, etc.

Read more: DTS Condition Monitoring in Oil & Gas Exploration

Dynamic wind farm load patterns recorded by long range DTS

The biggest Danish utility owner has successfully completed the installation of LIOS' Single Mode DTS equipment to monitor the power cable temperature of an offshore UK wind farm. This wind farm consists of 25 wind turbines and running in total 150.000 hours/year, designed for operational usage for in total 20 years. The high voltage power cable route is approx 20km long and connecting the offshore substation to a substation onshore. The DTS system provides real time distributed temperature sensing of the HV cable sections subsea and those inside the towers and ensures save and stable grid operation. Furthermore it helps activating hidden capacity reserves during dynamic transmission requests.

Read more:

Distributed temperature monitoring of power cables

This post is part of Blog Action Day 2009.

Reliable Energy Supply for the city of Graz, Austria

In order to improve the energy supply for the city of Graz, CCC GmbH Berlin installed new cable connections across the town between the transformer stations of Graz-South and Graz-West. The entire underground engineering, i.e. the joint base installation mand complete trenching construction was built by STEWEAG-STEG GmbH. 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 Distributed Temperature Sensing (DTS) system, the level of backup capacity can be assessed. These optical fibres can monitor the cable temperature along the trench and have been integrated into the sheath area of the cable.

Highlights

• 110 kV high-voltage power cables between transformer stations Graz-South and Graz-West
• 3 cable lines with a length of 3,2 km each (total 9,6 km cable),one of which is equipped for the entire distance of 3,2 km with integrated optical fibres in a steel tube integrated in the copper screen of the HV-cable for temperature monitoring (DTS)
• 18 sets of accessories
• Cross-bonding system in order to maximize transmission performance
• During the planning period numerous calculations for currentcarrying capacity were carried out in order to judge the influenceof crossing long-distance heating lines.
• Direct DTS data interface for temperature and operational data into the overall SCADA system of STEWEAG-STEG (Fernwirkanlage STEWEAG-STEG) using protocol IEC 60870-5-104

NKT group to decrease emission of CO2 by 12 percent over three years

“Recycling and the environment have been an integral part of NKT’s working agenda for many years. But our ambition is to be even greener,” says NKT’s CTO Søren Isaksen.

Over the next three years NKT will cut corporate carbon emission by a further 12%. The announcement of this specific target is a direct result of NKT’s decision last year to join the Carbon Disclosure Project.

“When submitting our first report to the Carbon Disclosure Project we could see that we had actually exceeded our own expectations. In the period 2001 to 2008, in our cable business, we reduced CO2 emission relative to output by 48%. So we feel we are already well on the way,” says Søren Isaksen, Chief Technology Officer for the NKT Group.

“However, this does not prevent NKT from setting new targets,” stresses Søren Isaksen. “In future, the ability to document carbon dioxide emission will be an important competitive parameter. Just as we impose demands on our suppliers, our customers impose demands on us. In this way, all players in the supply chain influence the environmental and carbon balance sheets.”

For more information on the Carbon Disclosure Project see:

• Carbon Disclosure Project to assess world business CO2 footprint


• Carbon Disclosure Project


• NKT lowers CO2 emission

Setting Standards for Highly Reliable DTS Performance

LIOS Technology GmbH is the leading manufacturer of industrial DTS systems with an impressive track record of more than 2000 installations in permanent operation. Its current DTS product series was carefully designed and thoroughly tested targeting reliable performance and smooth operation in industrial environments.
This was imposingly endorsed by the latest statistical field analysis in respect of a mean time between failures (MTBF) evaluation. Adapted from field data of our installed base of the current DTS product series an excellent MTBF figure of 28 years was reached.

High reliability is also a result of the unique optical frequency-domain reflectometry (OFDR) technology of the LIOS DTS systems. In contrast to time-domain technology using pulsed lasers with high peak powers, the LIOS OFDR DTS uses a quasi-continuous laser with low peak power resulting in a nonexistent wear out of the laser unit or any other fatigue of other optical components. The exceptional reliability favors the deployment of the LIOS DTS systems in all remote, safety-relevant and industrial applications.

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!

Read more:

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