New England's power grid summer outlook announced

Holyoke, Mass., May 4, 2012 — Under normal weather and system conditions, New England's electric power supplies are expected to be adequate to meet regional demand this summer, according to ISO New England Inc., the operator of the region's bulk power system and wholesale electricity markets.

However, reduced and uncertain supplies of liquefied natural gas to power generation in the Northeast Massachusetts/Greater Boston area during the summer could create local reliability challenges to that portion of the power grid if extreme summer weather conditions, with high consumer demand, occur or if unexpected resource outages occur. Under normal weather conditions, all areas of the region's grid should have adequate supply.

ISO New England has established procedures in place to bring the system back into balance if electricity supplies get tight as a result of an unexpected resource outage, or if an extended heat wave causes consumer demand for electricity to spike.

These actions could include calling on demand-response resources to curtail their energy use, importing emergency power from neighboring regions and asking businesses and residents to voluntarily conserve energy.

New England is a summer-peaking system, which means that consumer demand for electricity peaks during the hot summer months, largely because of air-conditioning use. ISO New England forecasts that demand could peak at 27,440 MW under normal summer weather conditions of about 90 degrees Fahrenheit.

This forecast reflects the impact of continued slow economic growth on consumer demand. Under extreme weather conditions, such as an extended heat wave with temperatures of 95 degrees or higher, consumer demand could reach 29,620 MW.

New England has about 32,800 MW of total capacity that includes generation, demand resources, and imports from neighboring areas.

Last year, an extended heat wave in the region pushed electricity demand up to 27,707 MW on July 22, just shy of the all-time record for peak demand of 28,130 MW set on August 2, 2006. In New England, 1 MW of electricity can power about 1,000 homes.

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