Climate change

One of the biggest challenges facing electricity networks worldwide is managing the impacts of climate change on assets to ensure safe and reliable service to customers.

To ensure climate impacts are adequately accounted for in our decision-making, we’ve identified the following priority impacts with potential to affect our transmission, distribution and telecommunications networks.

Priority impact   Asset type  
  Transmission Distribution Telecommunications
Maximum wind gust

• Direct damage

• Damage from vegetation

• Direct damage

• Damage from vegetation

• Direct damage

Maximum temperature

• Reduced transmission capacity

• Reduced distribution capacity

• Increased number of asset overloading failures

 
Storm intensity

• Increased outages per event

 

• Increased outages per event

Precipitation  

• Flooding of assets

 
Bushfire weather conditions  

• Increased potential for asset damage from bushfires

• Increased potential for asset damage from bushfires

For each of the priority impacts we’ve assessed the risks and determined key strategies to mitigate the risks. The strategies include:

  • Trialling non-burnable poles at selected high value pole locations in the high bushfire loss consequence area (HBLCA*)
  • Trialling fire-resistant paint for selected poles in the HBLCA and other high criticality/high fire danger locations outside the HBLCA
  • Updating our overhead distribution line design and construction manual to include the latest AS/NZS7000 design compliance requirements
  • Monitoring for any increase in weather extremes
  • Monitoring for any increase in occurrence of asset overloading failure rates

*The HBLCA is defined in the Tasmanian Electricity Code as an area categorised as “extreme loss consequence” or “very high loss consequence” from fire starts when utilising a fire control authority-endorsed bushfire hazard assessment tool.