Resilire

Extreme weather can have a significant impact on the electricity network due to damage directly from the weather conditions or through second order effects such as flooding or falling trees. During an extreme weather event, this damage can be widespread, challenging the resilience of the network and the operational response, leading to long interruptions to power supplies. Loss of power, especially over an extended period, has a significant impact on electricity customers, and this is only likely to become more so as reliance on electricity increases through decarbonisation.

 

Resilire is a framework for resilience modelling in electricity networks

 

The Resilire framework:

• Assesses the whole system resilience risk of long-duration outages due to severe weather
• Enables the targeting and justification of investment in network resilience

Resilire is designed to assess the overall resilience of a network to future extreme weather events and provide a means to compare diverse investment options in a consistent way.

 

Within Resilire, electricity network resilience is considered in terms of three aspects:

• Susceptibility – How susceptible is the asset to failure as a result of extreme weather?
• Vulnerability – How vulnerable is the network to asset failures? That is, how many customers are likely to be off supply as a result of extreme weather damage.
• Recoverability – How quickly can the power be restored after an incident?

 

Evaluating these three elements provides a view of the number and duration of power outages customers may experience due to extreme weather,  but to assess the impact of the event, the impact of these outages on customers needs to be assessed, and long-duration outages may have different and additional impacts beyond those of outages normally experienced.

 

We will soon be publishing the Resilire methodology document.