In an effort to make the existing transmission system more efficient, the Federal Energy Regulatory Commission ordered all transmission owners to consider ambient conditions when determining how much power can flow through their power lines.
The rule issued Thursday gives transmission owners three years to use the new line ratings after they file compliance plans at FERC.
Generally, transmission owners use conservative assumptions about the worst-case, long-term air temperature and other weather conditions when setting line ratings, FERC staff said Thursday at the agency’s monthly meeting.
