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US electric grid is under stress during cold snap

U.S. Electric Grid Operators on Saturday increased precautions to prevent power shortages and rotating blackouts, as the?cold weather that affected nearly half of the country's residents increased stress?on their operations.

The PJM interconnection, the largest regional?grid in the United States that?serves 67,000,000 people in the East & Mid-Atlantic, reported a temporary spike in spot wholesale prices on Saturday morning to almost $3,000 per megawatt-hour from levels as low as $200 per MWh.

Stormy weather and temperatures around 0 degrees Fahrenheit (-18 C), pushed up demand for electricity and caused some operators to close down natural gas production in key basins. Grid companies also faced restrictions on gas pipeline supplies.

Grid operations reports reveal that regional grid operators are calling on coal-fired power stations to increase their output due to a shortage of?gas.

Midcontinent Independent System Operator called on power plants to increase output and curtail electricity exports across a territory that spans 15 states from the Midwest, South and Manitoba in Canada.

MISO's emergency all-hands on-deck action is designed for utilities to be ready to "produce as much energy as possible" if some power plants have to shut down or reduce output due to freezing temperatures.

MISO wholesale spot electricity prices in Minnesota soared up to $500 per MWh as transmission bottlenecks on high-voltage lines plagued the upper Midwest. Spot electricity prices in MISO’s southern territory were lower than $50 per megawatt hour.

Fuel oil production in New England has been stepped up to conserve natural gas - the region's top fuel source - and to reduce its electric grid.

ISO New England's operation display showed that oil-fired generation was responsible for 26% (or more) of New England grid output early Saturday morning, compared to a normal?level of 1% or less. Natural gas generated 28% of grid output.

New England spot power prices were over $300 per MWh or almost doubled the price of Friday. (Reporting and editing by Jan Harvey; Tim McLaughlin)

(source: Reuters)