emix — archive

Definition of a "Price Interval"

From: Edward Cazalet <[email protected]>
To: [email protected]
Date: Sat, 03 Apr 2010 00:15:00 -0000

















Girsh, 



The definition of an
Interval I have been assuming is given by a start time and an end time which is
the same as you assume below.



Ed





Edward G. Cazalet, Ph.D.

101 First Street, Suite 552

Los Altos, CA 94022

650-949-5274

cell: 408-621-2772

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www.cazalet.com









From: Girish Ghatikar [mailto:[email protected]]

Sent: Friday, April 02, 2010 5:06 PM

To: [email protected]

Subject: [emix] Definition of a "Price Interval"







This came up during last week's eMIX
TC meeting -- What is the definition of price interval? What
elements/attributes are comprised in it?


For any price, there should be a standard "Time" factor associated
with it (unless the exception is there is "one" price for all
periods).



I think we should make a key distinction of price schedule versus the interval
(if we ever can) and how the generic price intervals are different from their
definition in DR signals (the notion of DR events).


Let's say for example, a price-responsive DR event in OpenADR may look
something like this (I am not saying this is how eMIX should address it as the
goal of sending the information and subsequent response may differ) --


        <p:drEventData>

          
<p:notificationTime>2010-02-08T15:17:21.000-08:00</p:notificationTime>

           
<p:startTime>2010-02-09T00:00:00.000-08:00</p:startTime>

           
<p:endTime>2010-02-09T23:59:59.000-08:00</p:endTime>

           
<p:eventInfoInstances>

               
<p:eventInfoTypeID>PRICE_ABSOLUTE</p:eventInfoTypeID>

               
<p:eventInfoName>price</p:eventInfoName>

               
<p:eventInfoValues>

                   
<p:value>0.03638841</p:value>

                   
<p:timeOffset>0</p:timeOffset>

               
</p:eventInfoValues>

        </p:eventInfoInstances>

        </p:drEventData>


What you see above is a definition of time slot (start and end time) that has
various attributes associated with it. Other attributes could be for example,
load shed, % shed, etc. However, all of these attributes are associated with
one time-slot notion, which is defined by the period of DR event.


Thank you,

RIsh



-- 


 
  
  Rish
  Ghatikar

  Lawrence Berkeley National Laboratory

  1 Cyclotron Road, MS: 90-3111, Berkeley, CA 94720

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