FW: Question about Instructed/Uninstructed Energy Data Usage

---------------------- Forwarded by Chris Stokley/HOU/ECT on 04/19/2001 09:13 AM ---------------------------

"Almeida, Keoni" <KAlmeida@caiso.com< on 04/19/2001 08:40:29 AM
To: "Emmert, Caroline" <caroline.emmert@enron.com<, "Stokley, Chris" <chris.stokley@enron.com<
cc:
Subject: FW: Question about Instructed/Uninstructed Energy Data Usage

I had to leave early yesterday, but I was able to get in touch with John to
follow-up with your page. See response below and feel free to provide a
specific example for us to research. Thanks

Keoni Almeida
California Independent System Operator
phone: 916/608-7053
pager: 916/814-7352
alpha page: 9169812000.1151268@pagenet.net
e-mail: <mailto:kalmeida@caiso.com<

< -----Original Message-----
< From: Ng, Chi-Pui
< Sent: Wednesday, April 18, 2001 5:45 PM
< To: Goodin, John
< Cc: Almeida, Keoni; Kondragunta, Vijayakumar
< Subject: RE: Question about Instructed/Uninstructed Energy Data Usage
<
< UE is UD less any Unavailable Capacity due to No Pay Condition. Thus, UE
< is always less than or equal to UD. Unavailable Capacity only applies to
< generators. As a result, the UD and UE may show a difference for
< generators, but not for the loads or interties.
<
< Uninstructed Energy charge is calculated by Region. The sum of the UEs in
< a region should equal to the billable quantity in CT 407. If Caroline
< provides the specific trade date for her example, we can check further.
< C.P.
<
<
< -----Original Message-----
< From: Goodin, John
< Sent: Wednesday, April 18, 2001 5:00 PM
< To: Kondragunta, Vijayakumar; Ng, Chi-Pui
< Cc: Almeida, Keoni
< Subject: FW: Question about Instructed/Uninstructed Energy Data Usage
<
< CP/VJ-
<
< Enron is struggling with the UD and UE columns in their
< instructed/uninstructed energy detail file. The specifics of their
< questions are below. Could you please review and respond to their
< questions below.
<
< Thank you,
<
< John Goodin
< California ISO
< (916) 608-7056 Phone
< (916) 608-7074 FAX
<
<
< -----Original Message-----
< From: Chris.Stokley@enron.com [mailto:Chris.Stokley@enron.com]
< <mailto:[mailto:Chris.Stokley@enron.com]<
< Sent: Wednesday, April 18, 2001 4:40 PM
< To: jgoodin@caiso.com
< Subject: Question about Instructed/Uninstructed Energy Data Usage
<
<
< ---------------------- Forwarded by Chris Stokley/HOU/ECT on 04/18/2001
< 04:47 PM ---------------------------
<
< Caroline Emmert
< 04/18/2001 04:05 PM
<
< To: Chris Stokley/HOU/ECT@ECT
< cc:
< Subject: Question about Instructed/Uninstructed Energy Data Usage
<
<
< ---------------------- Forwarded by Caroline Emmert/HOU/ECT on 04/18/2001
< 04:13 PM ---------------------------
<
< Caroline Emmert
< 04/18/2001 03:56 PM
<
< To: kalmeida@caiso.com
< cc: Donna Johnson/PDX/ECT@ECT
< Subject: Question about Instructed/Uninstructed Energy Data Usage
<
< Keoni,
< We are, still, struggling to fully understand the Instructed/Uninstructed
< Energy data (IE), specifically the two columns that report Uninstructed
< Deviation and Uninstructed Energy.
< The volumetric totals in one of these two columns is supposed to match the
< volume in the Settlement Detail file for Charge Type 407. However, I have
< discovered a couple of (annoying) things in September:
< In comparing the two columns within the table -
< For LocationTypes L and C, there is no volumetric difference between the
< two columns.
< For LocationType G, there is a volumetric difference of 153.15 (more in
< the Deviation column than in the Energy column)
< In comparing IE to the Settlement Statement data -
< When I use the volumes in the Uninstructed Energy column for all
< LocationTypes, I have a volumetric difference of 10.52 (less in the IE
< data).
< However, when I use the Uninst Energy column for L and C, and the
< Deviation column for G, I then have a volumetric difference of 142.63
< (less in the Settlement Statement Detail data).
< My question is two- or several-fold:
< What causes the volumes in the two columns to be different for the G type?
< I could find no discernable value to make it change anywhere in the data.
< Which column has the values that the ISO uses in determining the total net
< position for EPMI?
< Why don't the two sets of volumes match (IE to Settlement)?
< I really need to understand this, as we are required to tie all of our
< customer's volumes back to the Settlement Statement file, and, again, when
< the backup file doesn't match or is inconsistent, that makes our goals
< that much harder to achieve.
< Caroline
<
<
<