Although there is not a one-size-fits-all approach to reducing wildfire risk, strategies that prioritize speed, resilience, early detection and prevention, and added intelligence are vital to harden the grid and they’re paying off—dramatically reducing risks associated with the grid itself.
Fortifying the electric grid against the threat of wildfires is a major priority for utilities as extreme weather events become ever more common and wildfire risks increase. Although there is not a one-size-fits-all approach to reducing wildfire risk, strategies that prioritize speed, resilience, early detection and prevention, and added intelligence are vital to harden the grid and they’re paying off—dramatically reducing risks associated with the grid itself.
How are utilities reducing the risk of wildfires?
Extreme weather events due to climate change are becoming ever more frequent and severe. With below-normal precipitation, above-normal temperatures, unfavorable weather patterns and increased fuel loads, wildfire risks are expected to increase 20% (Bloomberg, September 2023).
As utilities continue to invest in strategies to mitigate and prevent wildfire risks, we recommend focusing efforts in four key areas.
- Deploying solutions that deliver immediate results over large areas.
- Moving distribution lines underground to improve resilience.
- Upgrading utility distribution systems with digital solutions that not only support smarter and more resilient power, but also predict the most prone areas. For example, by providing notifications of potential issues and quickly isolating impacted areas.
- Investing in research and development efforts that advance grid modernization through innovative and field-proven strategies.
Delivering immediate wildfire risk mitigation over large areas
A critical aspect of reducing risk is efficiently and cost-effectively deploying technologies on the expansive overhead distribution systems that currently run through dry or drought-stricken areas. There are a variety of traditional and widely-used equipment—like fuses, reclosers, switchgear, capacitors, and more— that can be upgraded or replaced with advanced solutions.
While no national standard exists, many utilities across the country have deferred to the test procedures and requirements established by the California Department of Forestry and Fire Protection (Cal Fire). The organization’spower line prevention field guide establishes a means to verify that enclosed devices, like reclosers and sectionalizers, do not generate external arcs or sparks and are therefore classified as exempt.
Typically, devices like fuses and lighting arresters are not exempt. Today however, there are several Cal Fire compliant options. For example, full-range current-limiting fuses significantly reduce the risk of a sparking incident, while innovative arrester systems minimize the occurrence of thermal runaway.
Continue Reading at T&D World
For more on wildfire season, check out what Xcel is doing in Colorado, PG&E’s efforts at wildfire mitigation, and more from T&D World on reducing wildfire risk.
