Power transmission line uprating and reliability improvement

The first step in the process of uprating is to collect as much detailed information about the line as possible. With second to none experience in airborne LiDAR surveys of power transmission lines OPTEN obtains accurate data on power line location detecting impairing clearances:

    conductor clearance to ground;
    crossed lines and vegetation;
    current density;
    technical condition of conductors;
    actual conductor temperature data.

For direct measurement of conductor temperature and current specially elaborated devices for online transmission line monitoring (OTLM, fig.1) are fastened to conductors of the surveyed line and power supplied by power distraction from live power line conductor.

Values of measured conductor current and temperature are transmitted via cell telephony channels to receiver installed at the power utility control board. Measurement accuracy amounts to 10 C for conductor temperature and 1 A for current. The device is equipped with a receiver of GPS signals. Due to this, temperature and current measurement data is time annotated.

Conductor temperature and current together with the data on the position of power transmission line elements in relation to the adjacent objects and terrain allow predicting the conductor behavior under various current load conditions. During this procedure we distinguish critical locations where due to the transmitting capacity increase conductor temperature will rise causing sag increase and clearance violation.

With all this information at hand quick and efficient engineering solutions ensuring an opportunity of considerable increase of transmitted power are elaborated.

The following practical means can be applied to achieve essential active power increase by more efficient use of existing network infrastructure objects:

    use of real time monitoring systems;
    applying flexible rating;
    reconductoring (equate to 2/3 of additional circuit construction cost);
    clearance control;
    conductor retention.


Fig. 1. Online
Transmission
Line Monitoring





















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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