[Milsurplus] Even Worse

[Peter Gottlieb]

The real use of synchrophasors is not for power setting (that can easily 
be done by far less complex methods) but for early indication of grid 
disturbances.  This is getting more valuable as the control of the grid 
is moving to a model-based design.  Humans just can't interpret and 
respond fast enough to prevent cascading problems.

Peter


J. Forster wrote:
> Ah, yes. Phase shifting is easy in a polyphase system. For example, a
> Scott connected transformer can change 2 phase to 3 phase, or the inverse.
>
> Thanks,
>
> -John
>
> ==============
>
>
>   
>> Yes, it's done with a specialized tap-changing transformer called a Phase
>> Angle Regulator.  This paper describes how they're used:
>> http://www.npcc.org/viewDoc.aspx?name=Phase+Angle+Regulator+Operation+-May+2
>> 000.pdf&cat=LEER
>>
>> Albert
>>
>> -----Original Message-----
>> From: milsurplus-bounces at mailman.qth.net
>> [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Larry Godek
>> Sent: Sunday, July 04, 2010 6:10 PM
>> To: nerd at verizon.net; Milsurplus at mailman.qth.net
>> Subject: Re: [Milsurplus] Even Worse
>>
>> Do power companies share power back and forth according to peak periods by
>> changing the phase slightly?  Where did i come up with this idea?  I
>> really
>> don't remember.
>>
>> Larry
>> W0OGH
>>
>>
>> --- On Sat, 7/3/10, Peter Gottlieb <nerd at verizon.net> wrote:
>>
>> From: Peter Gottlieb <nerd at verizon.net>
>> Subject: Re: [Milsurplus] Even Worse
>> To: jcoward5452 at aol.com
>> Cc: jfor at quik.com, milsurplus at mailman.qth.net
>> Date: Saturday, July 3, 2010, 1:46 PM
>>
>> The power companies already do that and is able to compare phasors
>> across the grid.  Check out NASPI, the North American SynchroPhasor
>> Initiative.
>>
>> I set up a PMU (Phasor Measurement Unit) at my plant already, it uses
>> GPS for time sync.
>>
>> Peter
>>
>>
>>
>> jcoward5452 at aol.com wrote:
>>     
>>> Here at our secret development Lab, we phase lock the 60~ to a GPS
>>>       
>> receiver. This is how you make all the frequencies in the audio spectrum
>> exact. This is really no secret as most Laboratories have a "house"
>> standard
>> derived from a GPS receiver.
>>     
>>>   Jay
>>>
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: J. Forster <jfor at quik.com>
>>> To: Richard Brunner <brunneraa1p at comcast.net>
>>> Cc: milsurplus <milsurplus at mailman.qth.net>
>>> Sent: Sat, Jul 3, 2010 1:06 pm
>>> Subject: Re: [Milsurplus] Even Worse
>>>
>>>
>>> There is a thread on another list about radioactive tubes. I replied:
>>> "And, isotopically pure Thorium likely costs $millions / pound.
>>> What an opportunity for the Audiophools! Now, your Tube Amp can be
>>> onstructed with eviro-pure tubes. No harmful radiation to contaminate
>>> the
>>> larity of the sound. We at, PT Barnam AudioLabs, use only isotopically
>>> ure Thorium cathodes!!"
>>> :-)))
>>> -John
>>> =============
>>>
>>>
>>>   This is beyond witless. Who are these people with so much money and so
>>>   little sense?  I notice they also can't spel, so it's consistent.
>>>   Imagine, three brass spikes!
>>>
>>>   Richard, AA1P
>>>
>>>
>>>   On Sat, 2010-07-03 at 08:57 -0700, J. Forster wrote:
>>>    
>>>       
>>>> http://www.cruzefirstaudio.com/tripoint.htm
>>>>      
>>>>         
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>>>    
>>>       
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>>     
>
>
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