Library from Colorado

New wind farm planned

PEETZ — Xcel Energy and Invenergy Wind LLC have reached agreement on a power purchase contract for 200 megawatts of wind energy to be constructed in 2006-2007 by Logan Energy LLC, an affiliate of Invenergy Wind.
23 Jan 2006

Wind energy not a panacea

To be sure, we are at a crossroads in energy and need all kinds of ideas to supply the enormous demand that is now filled by fossil fuels; however, I’m not ready to surrender the last open prairies to this version of energy independence.
21 Jan 2006

Major step on wind energy

Xcel says wind power will mostly supply intermittent and peak power - energy demands that fluctuate day to day or even hour to hour. Unfortunately, that means it still must rely on coal, the most polluting fossil fuel, supplemented by natural gas, the most expensive fossil fuel, for its base load (the kind of electricity that's always on).
3 Jan 2006

Grid Impacts of Wind Power Variability: Recent Assessments from a Variety of Utilities in the United States

Ewec06gridpaper_thumb In this report we discuss some recent studies that have occurred in the United States since our previous work [2, 3]. The key objectives of these studies were to quantify the physical impacts and costs of wind generation on grid operations and the associated costs. Examples of these costs are (a) committing unneeded generation, (b) allocating more load-following capability to account for wind variability, and (c) allocating more regulation capacity. These are referred to as “ancillary service” costs, and are based on the physical system and operating characteristics and procedures. This topic is covered in more detail by Zavadil et al. [4].
1 Jan 2006
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