
Duck curve
As the world transitions to an energy model based on renewable sources, new challenges are emerging in how we manage the electricity grid. One of the most well-known—and visually striking—is the so-called “duck curve”. Coined in 2012 by the California Independent System Operator (CAISO)1, the term refers to the shape taken by the net electricity demand curve over the course of a typical day. Net demand is defined as the total electricity demand minus solar generation. A clear example of this phenomenon can be seen in a graph from California on October 22, 2016, a sunny day with low and