Concepts
Duck Curve
Grid Operation
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The shape solar power gives a grid's day: net load sags in the middle of the day when solar generation is highest, then climbs steeply in the evening as the sun sets and demand stays up, an outline that reads as a duck on the chart. First observed by California's grid operator, the curve deepens as solar grows, and the evening ramp it creates is the operational argument for storage, flexible plants and demand response.
Facts
Concept Domain Formulated YearCoined by the California Independent System Operator (CAISO) to describe how a deepening midday solar surplus reshapes the grid's own net-load curve. Cross-Tradition Connections
Sources
1. United States Energy Information Administration Official Site
US Energy Information AdministrationToday in Energy, As solar capacity grows, duck curves are getting deeper in CaliforniaQuote, Today in Energy, As solar capacity grows, duck curves are getting deeper in California
That rapid ramp up makes it more difficult for grid operators to match grid supply (the power they are generating) with grid demand in real time.
2. Wikipedia
Wikimedia FoundationSolar powerQuote, Solar power
the term was coined in 2012 by the California Independent System Operator.
California ISO
California Independent System OperatorAssociated With: Curtailment, Managing the evolving gridQuote, Associated With: Curtailment, Managing the evolving grid
The ISO's market automatically reduces, or curtails, renewable generation to match supply with demand.
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