In an effort to better utilise and improve the efficiency of its assets, TransGrid will undertake a number of projects across its network, including dynamic line rating, low- spans transmission line, and optical fibre ground wire projects.
The project to implement the dynamic line rating system weather stations will see the New South Wales high-voltage operator install weather base stations next to approximately 20 high voltage transmission lines across its network. This will help to provide real-time and accurate local weather information on what conditions the transmission line is experiencing.
The weather stations will be able to measure, monitor and record ambient temperature, wind speed and direction and solar radiation. The dynamic line ratings will allow TransGrid to better utilise the line in accordance with the current local weather conditions. This will mean under favourable weather conditions, there is the ability for more power to be transported across the transmission line, thus improving the efficiency and capacity of the line.
To implement the system, TransGrid will install weather stations mounted on a ‘see-saw’ pole next to the selected transmission line. This will help to eliminate the need for an outage during installation and maintenance activities and will help to improve reliability and safety.
TransGrid will also undertake a low span transmission line project, which will involve raising the height of some spans of existing transmission lines that have been identified as having low clearance to ground or objects.
In addition, operator’s optical fibre ground wire project involves the replacement of ageing ground wires located on the top of existing transmission lines with new optic fibre cables. The optic fibre cables will continue to provide the coverage of the old ground wires but also provide increased communication capabilities to improve the efficient and safe operation of the state’s transmission network.