Heat, short supply dog California

Californians hunkered down for another day of hot weather and darkened offices Wednesday as the California Independent System Operator issued a warning and solicited supplemental bids of up to 4,000 Mw�its highest of the week�to boost power supplies.

Sep 20th, 2000


Californians hunkered down for another day of hot weather and darkened offices Wednesday as the California Independent System Operator issued a warning and solicited supplemental bids of up to 4,000 Mw�its highest of the week�to boost power supplies.

Early in the day, the ISO was projecting peak loads of 45,065 Mw Wednesday, exceeding by 65 Mw the amount of peak power connected to the ISO-controlled grid. The agency later reduced projected peak demand for the day to 44,094 Mw, 790 Mw short of the July 12 record.

Temperatures are projected to reach the triple digits in the Valley area and the high 90� F. in the San Francisco Bay. area. After narrowly averting rolling blackouts Monday, the ISO made it through Tuesday without having to issue a Stage 2 alert, indicating reserves have fallen below 5% and activation of interruptible supply contracts.

If power reserves drop below 1.5%, the ISO moves to Stage 3, directing utilities to "drop load," necessitating controlled, involuntary rolling, or rotating, outages for groups of customers across their service areas until sufficient reserve levels are achieved.

Energy consumption nearly exceeded energy availability, challenging the power grid, Monday, ISO officials said. The agency, which manages most of the California grid, got emergency electricity supplies from the federal Bonneville Power Administration and the Western Area Power Administration to help supply Monday's peak power demand and avoid a Stage 3 emergency. It also directed state utilities to drop all interruptible load customers.

More in Home