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

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.
  
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	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 ...

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.

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

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!

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

Investments in Smartgrid Technologies encourage LIOS to open US office

LIOS Technology, leading provider of state of the art frequency domain based distributed temperature monitoring solutions (DTS), announced today that it has opened an office in Morganville, New Jersey to service the growing demand for distributed temperature solutions in the United States. The New Jersey office expands LIOS’ ability to offer local sales and support services to its fast growing base of customers and prospects in the North-American market.

Corporations in the United States have been strong adopters of DTS solutions particularly in the power industry where the security, reliability and performance of temperature monitoring systems are critical.

"Especially with the SGIG (Smart Grid Investment Grant Program) we are experiencing growth in market demand and level of interest in our products and solutions," said Konrad Linckh, director of the LIOS New Jersey office. „Our customers are expanding their commitment to ensuring the reliability and performance of the transmission and distribution systems they operate. The continuous and cost-effective grid monitoring solution offered by LIOS supports that commitment and is the essential success factor of Smart Grid implementations.”

The new office is located at:

LIOS Technology Inc.
1400 Campus Drive West
Morganville, NJ 07751, USA

Tel: +1 (732) 970-8062
Fax: +1 (732) 972-4410