On 06/20/2016 10:29 PM, Peter Renzland via talk wrote:
On Jun 20, 2016, at 20:31, Michael Galea via talk <talk@gtalug.org> wrote:

      
Someone remarked that the accuracy of 60 hz is good, and that over-frequencies would cancel under-frequencies. I would really doubt that they could do that to any great degree of accuracy. The grid is the largest machine on Earth, and there is more than just a single generator.
https://en.wikipedia.org/wiki/Utility_frequency#Long-term_stability_and_clock_synchronization


https://www.ospe.on.ca/public/documents/presentations/electrical-grid-part-1.pdf  around slide 40.
It does not give a specific number for the "dead band"
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