It is like keeping a pressure cooker's whistle steady, beta. The grid must balance supply and demand every second because electricity cannot be stored in bulk; if demand runs ahead, frequency falls, and if supply runs ahead, it rises. A frequency deviation is that wobble—a sign our 'whistle' is off-pitch, risking equipment damage or blackouts. I know this not just from dials in the control room, but from the flicker in my daughter's study lamp in Bokaro, a reminder that my vigilance here powers her dreams there.
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