RE: Quality Product

["Holmberg, David" <david.holmberg@nist.gov>]

EIS-A SRS has a section on quality with some parameters. 

This information is based upon power quality events defined within IEEE 1159-2009. A 
298 Service Level Agreement (SLA) between a and an electrical energy provider should be 
299 based on an agreed upon number of transients, sags, voltage fluctuations, voltage dips 
300 and interruptions, voltage imbalances, power-frequency variations, induced low 
301 frequency voltages, and CD in AC networks events defined in the IEEE 1159 standard. 
302 A placeholder was added to this information to indicate Quality of Service (QOS), similar 
303 to the Availability found in telephony/data systems. In the future we expect the industry 
304 to create a metric that defines--"good power", power availability, or Quality of Service. 
305 The Power Quality information exchanged across the ESI is defined in Table 2.1. 
306 

Properties                              Data Types            Units

Transients / Billing Period       ULong                    n/a
Sags / Billing Period                ULong                   n/a
Swells / Billing Period              ULong                   n/a
Interruptions / Billing Period   ULong                  n/a
Voltage Imbalances / Billing Period    ULong      n/a
power frequency variations / Billing Period   ULong   n/a
Others (See IEEE-1159) / Billing Period    ULong   n/a
Quality of Service             PerCent                 %   
Table 2.1 Power Quality Information
________________________________________
From: Considine, Toby (Campus Services IT) [Toby.Considine@unc.edu]
Sent: Thursday, May 13, 2010 5:40 AM
To: emix@lists.oasis-open.org
Subject: [emix] Quality Product

Where does quality fit in Emix?

For sake of conversation
Restrict Emix to simple Load
Leave out the performance classes for a moment
Don’t worry about DR.

Now we have a simple purchase of 1 KWh of 120 volt 3 phase 60 Hz A/C for one hour.

-          I can offer it

-          I can buy it

-          I can get it

-          My meter can record it

If the voltage sags for five minutes in the middle has it been delivered or not? How about 45 minutes?
If it is out of phase has it been delivered or not? How much has it been out of phase?
Is a closure event failure to deliver?

The answer is of course “It Depends”
Or the long form, “It Depends on what’s in the contract”
But how do we specify the quality for the contract…

tc




________________________________
"If something is not worth doing, it`s not worth doing well"
Peter Drucker
________________________________
Toby Considine
Chair, OASIS oBIX Technical Committee
Co-Chair, OASIS Technical Advisory Board
Facilities Technology Office
University of North Carolina
Chapel Hill, NC



Email: Toby.Considine@ unc.edu<mailto:Toby.Considine@fac.unc.edu>
Phone: (919)962-9073
http://www.oasis-open.org
blog: www.NewDaedalus.com