Conservation Urged as California ISO Declares Transmission Emergency.News Editors/City Desks FOLSOM, Calif.--(BUSINESS WIRE)--May 3, 2004 Unseasonably High Temperatures Drive up Demand for Power as Voluntary Interruptible Customers Are Called Upon in Southern California Southern California, also colloquially known as SoCal, is the southern portion of the U.S. state of California. Centered on the cities of Los Angeles and San Diego, Southern California is home to nearly 24 million people and is the nation's second most populated region, Only The California Independent System Operator (California ISO (1) See ISO speed. (2) (International Organization for Standardization, Geneva, Switzerland, www.iso.ch) An organization that sets international standards, founded in 1946. The U.S. member body is ANSI. ) issued a Transmission Emergency at 2:30 p.m. as a Southern California transmission path reached its capacity limit. To maintain stability of the grid and keep the lines operating within safety limitations, voluntary interruptible customers in Southern California were called upon to shed electrical load If an electric circuit has a well-defined output terminal, the circuit connected to this terminal (or its input impedance) is the load. (The term 'load' may also refer to the power consumed by a circuit; that topic is not discussed here. . The California ISO asked Southern California Edison Southern California Edison (or SCE Corp), the largest subsidiary of Edison International (NYSE: EIX), is the primary electricity supply company for much of Southern California. It provides 11 million people with electricity. to call upon 600 megawatts of commercial customers that have signed up to voluntarily curtail cur·tail tr.v. cur·tailed, cur·tail·ing, cur·tails To cut short or reduce. See Synonyms at shorten. [Middle English curtailen, to restrict power during high demand days. The California ISO does not anticipate additional curtailments of service (aka "rotating blackouts") today. Today's Emergency comes as the ISO Control Area reaches its highest demand for power so far this year. The expected peak demand on the transmission system is expected to reach 40,451 megawatts at approximately 4 p.m. The general public can help by avoiding the use of heavy electrical appliances and keeping the thermostat thermostat, automatic device that regulates temperature in an enclosed area by controlling heating or refrigerating systems. It is commonly connected to one of these systems, turning it on or off in order to maintain a predetermined temperature. no lower than 78 degrees between the hours of 2 and 6 p.m. today. The California ISO is a not-for-profit public benefit corporation charged with managing the flow of electricity on California's power grid. The mission of the California ISO is to safeguard the reliable delivery of electricity, and ensure equal access to more than 25,000 circuit miles of "electron highway." As the impartial operator of the wholesale power grid in the state, the California ISO conducts a small portion of the bulk power markets. These markets are used to allocate space on the transmission lines, maintain operating reserves In power systems, the operating reserve is the generating capacity available to the system operator within a short interval of time to meet demand in case a generator is lost or there is another disruption to the supply. and match supply and demand in real time. Conservation tips and continuous system condition updates are available on the ISO website at www.caiso.com. |
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