Western implements intra-hour transmission scheduling

On July 12, Western switched its transmission scheduling from every hour to every half hour.

The change to intra-hour scheduling is expected to increase the grid and markets ability to respond to supply and demand fluctuations, particularly with the influx of variable energy resources like wind and solar power. It will also allow for more flexible and efficient use of available transmission.

“The initiative provides renewable generators the ability to have their actual [generation] closer to the schedule, reducing their exposure to imbalance penalties,” said Mike McElhany, a member in the Transmission Business Unit in the Desert Southwest region. “It helps level the playing field and provides more flexibility to integrate renewable energy.”

Shortening the timeframe permits increased integration of those variable resources when they’re available and the ability to quickly ramp up alternate sources when they’re not, without unduly penalizing renewable generators.

“It helps limit additional costs faced by the renewable producer when their actual generation and scheduled generation do not align, reducing the cost of integrating renewable generation,” said Ron Moulton, Transmission Services Manager for DSW and Rocky Mountain region.

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