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PJM, the largest US power grid, intensifies emergency measures to prevent blackouts

PJM, the largest U.S. power 'grid operator, said?Friday he was on a federal alert for reducing electricity consumption in his territory due to generator failures, massive overloading of?its transmission lines and a spike in ac usage from prolonged sweltering temperatures.

PJM said it had told utilities that they could reduce the electricity supplied to customers if they were under contract. PJM serves 67,000,000 people in the Mid-Atlantic, South, and Washington, D.C. area.

This week, spot wholesale electricity prices in Northern Virginia, the home of the largest 'collection of data centres in the world, soared past $2,000 per megawatt hour. This compares to a?about 40?per MWh if PJM was not in distress.

According to industry analysts and PJM operations data, the surge in prices is mainly because it's becoming expensive to supply power accross congested high voltage power lines.

(source: Reuters)