Fiber optic overhead ground wire (OPGW) design

OPTEN Limited since 1993 takes part in construction of practically all main Fiber-Optic Communication Lines using Overhead Power Transmission Lines (FOCL-OHL) in Russia. Among the projects implemented by OPTEN Limited are telecom network of Kemerovo region of 600 km long, per contract with Kuzbassenergo (Fig.1), two FOCL of total length about 400 km in North-West of Russia, per contract with power utility Lenenergo jointly with telecom companies RosTelecom and IVO International (Finland), telecom networks in power utilities Ivenergo (Central Russia) and Odessaenergo (Ukraine). TSL (Fig.2) is one of the biggest of projects implemented by OPTEN.

Accurate and detail information on line's actual condition is required to achieve high efficiency of OHL upgrading aimed on replacement of existing groundwire with OPGW. Unfortunately, necessary information is often not available at power facilities maintaining OHL. Changes in OHL elements occurred due to climatic and operation conditions affection (damage or expansion of wires, extra towers erection), are far not always recorded in utilities' papers with sufficient accuracy. Inventorying a OHL and specifying its parameters like span, sag of wires and groundwire, type and accurate location of towers, given significant length of line and traditional survey methods applied, is very time and cost consuming.

High accuracy of FOCL route aerial survey results being presented in digital form allows not only quick and efficient determining OPGW cut lengths required for ordering specification on optic cable. Digital data of aerial survey make it possible to introduce a complete automated system of FOCL design. A digital map of FOCL route produced upon aerial and ground based survey, plays important role in this system. All kinds of data could be delivered in digital form to the specialized software as well as to various standard applications such as AUTOCAD, PLG-CADD, POLE-CAD, ArcVieW, MapInfo etc.

Software package used for design work performance allows compilation of electronic listing indicating numbers and types of OHL towers, span lengths, pivot angles, objects crossed by the line (power lines, roads, etc.), select and indicate cable joint boxes location. A calculation of mechanical load, check of cable's resistance, towers' bearing capacity for various combinations of wind and ice loads is performed within automated system. One of important stages of design works is calculation of fault current values on various segments of line (especially close to substations), and check of cable's thermal resistance.  

With automated design system, OPGW installation records, listing of vibration dampers, joint boxes, etc. required for construction performance, are compiled. The same system is used to produce as-built documentation in any format convenient for customer (printed or electronic).

Fig. 1.  Plan of regional telecommunication network





Fig. 2. Fiber Optic Communication Line
Birusinsk - Belogorsk





















News

11.02.2014

The company Soyuztekhenergo (OPTEN Group of companies) has completed the installation of the MetrySense-4000 power lines insulation monitoring system for JSC Lenenergo...

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26.11.2013

The company OPTEN has completed a project on 700 km power transmission lines survey for Réseau de Transport d'Électricité...

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08.11.2013

November 13th at the European LiDAR Mapping Forum in Amsterdam Konstantin Konakov, general director at ZAO Opten Limited, will report on "Echo of World War 2 and Aerial LiDAR Survey"...

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27.06.2013

Optech's third Imaging and LiDAR Solutions conference in Toronto. ZAO Opten Ltds General Director Konstantin Konakov made the report: Surveying Power lines with Optech Lidar Systems: Opten's Experience...

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01.06.2013

Opten supported the 2nd annual DLR Day in Brussels (Belgium), May 30 2013 Konstantin Konakov, general director of ZAO Opten Limited, made a report DLR experience in Russia...

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05.04.2012

OPTEN is going to be the first company in the world providing our services on the basis of the most up-todate and effective ALTM Orion with pulse repetition rate of 300 kHz...

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29.11.2011

The main project objectives was to monitor technical condition of 3000 km of power transmission lines within the framework of planning further measures aimed at transmission reliability improvement...

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29.10.2011

In alliance with Nantes engineering firm Atlantique Etudes OPTEN has won a six-year international tender of French electric grid company, Réseau de Transport dÉlectricité (RTE)...

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28.10.2011

OPTEN starts working on a new project in Australia for electric grid company ElectraNet which involves airborne LiDAR survey of over 4000 km of 135 kV power transmission lines...

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07.07.2011

Working under Mozambican contract Opten has implemented Airborne laser survey on about 1800 km overhead power transmission lines. Our engineers have reviewed and summarized all laser reports and analyzed the statistics within four major areas...

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