Watch North America's electric power grids respond to the 2017 eclipse, live!

Source: Newswire.com

On Monday, August 21, North American power grids will be the subject of a celestial experiment: now that we have lots of grid-connected solar power, what exactly will happen when the sun abruptly vanishes?

 

Alameda, California (Newswire.com) - On Monday, August 21, North American power grids will be the subject of a celestial experiment: now that we have lots of grid-connected solar power, what exactly will happen when the sun abruptly vanishes?

You can watch this experiment unfold, live, at two web sites: LiveEclipse.PQube3.com/West and LiveEclipse.PQube3.com/east.

The eclipse will pass through the two largest North American power grids, informally called the Western Interconnect and the Eastern Interconnect, missing the other two main grids in Texas and Quebec.

Here's the challenge: minute by minute, grid operators must carefully balance the output of thousands of grid-connected generators against all the rapidly varying grid-connected loads. This balancing act is eased by two characteristics of grid load called "diversity" and
"predictability".

Monday's eclipse will challenge, for the first time, both the diversity and predictability of a significant amount of solar power generation.

The eclipse will darken large swaths of solar power generators simultaneously, reducing diversity. Fortunately for grid operators the exact eclipse path and timing are predictable, so grid operators can plan for solar power losses. But how much?

Grid operators know exactly where their large solar arrays are, and how much power they generate. But they have far less information about smaller rooftop solar arrays.

And that's what makes this experiment interesting.

Using ultra-precise PQube 3 instruments, we watch the grid frequency that indicates the balance between generation and load. It should be 60 cycles per second, or 60 Hertz. Higher than 60.000 Hertz means there's slightly more generation than load; lower, and there's slightly less. The grid operators dance with the frequency, adjusting the generator settings throughout the grid to maintain a steady flow of power.

Watch the grid frequency - it's an entirely different way to watch Monday's eclipse unfold!

Power Standards Lab is a private-held company in Alameda, California, that performs research projects with the U.S. Department of Energy and the National Labs, often using the ultra-precise PQube 3 instrument.

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