California watching wildfire threat to grid

LADWP Wildfire Power Conservation: Customers urged to cut usage as Angeles National Forest blaze threatens 500-kV transmission near Acton; Cal ISO readies generation to protect grid reliability amid heat wave and peak demand Los Angeles.

The California electric grid operator called on additional power plants to be ready to run as a deadly wildfire expanded near Los Angeles, increasing the threat to high-voltage power lines serving the city.

The Los Angeles Department of Water and Power (LADWP) asked customers to limit electric use as the fire raging in the Angeles National Forest has the potential to damage two 500-kilovolt lines northeast of the Acton area, the municipal utility said in a release.

Those 500-kv lines are critical to importing a steady supply of power into Los Angeles, LADWP said. The agency has activated its power plants in the area as part of efforts to reduce outages during contingencies in the event more generation is needed.

"The threat to these lines, combined with the typical high energy demand on hot days, makes it even more necessary that all customers make every effort to reduce their energy demand," the agency said.

The Station fire doubled to nearly 86,000 acres over night, officials said.

Just recently, as many as five power lines in Southern California were knocked out by the fire for at least some period of time, but no electric service was disrupted, and no California outages were reported, said Gregg Fishman, a spokesman for the California Independent System Operator.

No lines were affected by the fire, Fishman said.

"Still, the potential is there," he said. "We are monitoring the situation very closely."

The grid operator has called on additional power plants across the state to be ready to step in to supply electricity should transmission be affected, noting that the blackout threat eased somewhat as reserves improved, Fishman said.

Meanwhile, many areas of the state continue to experience a statewide heat wave and above-normal temperatures, boosting normal August power needs.

The Cal ISO system, which transmits about 80 percent of the electricity used in California, saw power demand to peak at 42,600 megawatts August 31 and 43,370 MW September.

Today's high in Los Angeles is forecast to reach 95 degrees Fahrenheit (35 Celsius), 11 degrees above normal for late August.

One megawatt in Southern California can serve about 650 average households but fewer homes during periods of high heat when demand soars.

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