When other types of power plants go dark, hydropower provides, hydropower provides a fast, crucial response in seconds
that quantified hydropower’s contribution to grid stability in the United States’ western region. When other power sources go out, hydropower can rapidly ramp up, recoup shortfalls, and stabilize the grid nearly instantaneously.in the past five years.who led the multi-national laboratory study. “For years, operators have used hydropower for grid stability, but the extent of hydropower’s contributions haven’t been known beyond that sphere — until now.
Frequency response is roughly like using a car’s cruise control while going uphill. The engine revs to maintain speed. Similarly, when part of the grid unexpectedly goes dark, other power plants rev up to backfill lost power and maintain frequency at 60 Hz. This happens in seconds. We don’t notice frequency drops because inertia from rotating generators, industrial motors, or turbines keeps the lights on while the grid ramps back up to full speed to meet the energy demand.
. The line dropped onto the tower, causing a fault and a power outage that took a solar plant off-line. This caused a sudden drop in the entire grid’s frequency. Hydropower throughout the West responded instantaneously to counteract that frequency change and contributed 60 percent of the response in stopping a potential power free-fall.
With an eye on the Western Interconnection, the vast energy throughfare that powers the western United States, the research team demonstrated that hydropower is already positioned to stabilize the grid when the power drops. Using simulations and historical events, they found that hydropower’s contributions to frequency response ranged anywhere from 30 to 60 percent.“It’s not easy to put a price tag on the value of frequency response, but in the future we’re likely going to have to,” said Somani.
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