Combining State's Wind, Solar Resources Enhance Renewable Power Potential

The value of Minnesota's wind resource as a source of electric power could be significantly increased by combining wind and solar generation facilities, according to a study reported today by the Minnesota Department of Public Service (DPS).

DPS analyzed data collected over a two-year period in southwestern Minnesota, the area with the state's highest wind power potential and the site of Northern States Power's (NSP) wind farm development. The data shows that over the course of the year the solar resource is at its peak during periods when demand for electricity is high, with the correlation particularly pronounced during the summer when the wind resource is at its lowest point.

The study concludes that "a combination of wind and solar generation facilities could produce electricity that more closely matches the demand curve for electricity throughout the year. A drawback to relying on renewable energy resources such as wind and solar is their intermittent nature -- the inability to provide electricity on demand," says Kris Sanda, DPS Commissioner. "Our study shows that combining solar and wind in Minnesota diminishes that drawback and increases the value of electricity produced."

Wind and solar resource data were collected at five sites, all located in the Buffalo Ridge area [near Lake Benton!] where wind development is concentrated. The study found daily and seasonal patterns of wind and solar availability and matched them with electric demand for NSP and Cooperative Power. The wind resource is highest from November through April, and the solar resource is highest from April to August.

Supported by funds from DPS, the U.S. Department of Energy, and NSP, the study is part of the Department's ongoing assessment of Minnesota's renewable energy resources. A copy of the complete report, "Minnesota Wind/Solar resource Evaluation Project," will be posted on the Department of Public Service web page beginning Monday, June 30.

Lincoln County Valley Journal (June 25, 1997)

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