Visualization of Seasonal Variation in California Wind Generation

This interactive three-dimensional visualization displays the seasonal variation of wind generation in California. The visualization shows generation projects of at least 10 MW with their capacity factors (CF) on a base map of wind resources. Monthly data is available for projects of this size. Columns at the project locations are scaled and shaded so the height and color represent the CF of the project. (Capacity factor is the ratio of the energy produced to the amount that could have been produced in the same period.)

The map is best viewed using the current versions of Chrome and Firefox web browsers. If using Internet Explorer, be sure Compatibility View is turned off. If you have trouble viewing the map content, contact us, and we will provide the information in an alternative format.

Visualization of Seasonal Variation in California Wind Generators

The 3-D map can be rotated, tilted, and panned using the buttons of the mouse and zoomed using the mouse wheel. The display is an animation that steps from one month to the next, either forward or backward in time. Controls allow the viewer to switch features of the display, including the month and year and the animation speed and direction. Clicking on a single generator column displays a table of values. CFs are shown in decimal fractions in the table. The number of turbines represents the latest quarter that turbines were available to generate at the plant.

Projects are plotted on a base map that depicts wind resources across the state, and a legend shows the wind speed classes. The base map shows resources at 70 m height; new commercial-scale wind turbines are typically designed for at least this height. As technology improves, greater resources become available at taller heights. Wind power is proportional to the cube of the wind speed. A doubling of wind speed at the rotor results in an eight-fold increase in wind power. County boundaries are also shown on the map for reference.

Renewable energy resources have a size and geographic distribution within each state. Planning and land use constraints limit how much of and where these resources are used, and energy generation is limited by national, state, and local policies. Two examples are the DRECP and the RETI.

By exploring the educational visualization, a viewer can gain a three dimensional understanding of seasonal variation in generation CFs, along with the locations and distribution of generation projects. Moving through the 3-D space gives a conception of generation CFs across the state. The viewer can observe that most projects peak in the summer months, although a few peak in the winter. The large range in CFs is also apparent.

Values displayed are subject to revision when more accurate data is available. Data analysis and visualization is by Energy Commission staff. Base map is by AWS Truewind. For further information, contact Brian Huang, Diana Le, or John Hingtgen .