Hi

Quebec Hydro and I suspect others use it to regulate power generation 
facilities. Keeps them from simply cross feeding power through the reactance of 
the distribution network. They have some pretty long lines between source and 
load....

Bob



On Sep 11, 2010, at 10:53 PM, Brian Kirby <kilodelta4foxm...@gmail.com> wrote:

> I believe the primary reasons for GPS receivers for the power industry is 
> power line fault location.  They use time tagging to measure disturbances to 
> locate a fault and it's accuracy directly determines its resolution.
> 
> On 9/11/2010 7:33 PM, jimlux wrote:
>> Stan, W1LE wrote:
>>> If the odd harmonics were filtered out, would the zero crossing of the
>>> 60 (50) Hz fundamental
>>> be stable enough ?
>>> 
>>> 
>> not to 30 ns <grin>
>> 
>> 
>> Interestingly, one of the markets that Symmetricom/TrueTime/Datum sells
>> into is GPS disciplined receivers used for power control. Power
>> transmission is managed by controlling relative phases in the system,
>> not to mention things like synchronizing generators.
>> 
>> 
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