Availability of Dynamic Load Profiles for Review

May 1, 1998

TO:	January/February CPUC Load Profiling Workshop Participants
	Entities on SCE's ESP Services E-Mail Listing
	Steve Roscow, CPUC
	ALJ John Wong, CPUC

cc:	CPUC Direct Access Website

From:	Carl Silsbee, SCE (silsbech@sce.com)

Subject: Availability of Dynamic Load Profiles for Review

Since early April, SCE has been posting sample dynamic load profiles
(DLPs) for residential, GS-1 and GS-2 customer groups to our website,
www.edisonx.com/rci. (You will need to follow the hyperlinks from this
main page).  The process appears to be working well. You can access
these DLPs for review and testing at this time. The DLP files contain
data beginning with transaction day April 1, 1998.  Although the DLPs
are based on real data from our load research sample meters, they are
NOT for use in PX/SC and ISO settlement at this time.  ESPs should
continue to use the static load profiles we have previously provided for
these customer groups through transaction day May 17th.

ESPs with questions regarding the posted DLPs during the testing phase
through May 17th should send e-mail to Cyrus Sorooshian at
soroosc@sce.com.  Cyrus is responsible for preparation of the DLPs which
we are posting.  Once we begin posting the DLPs for PX/SC and ISO
settlement, ESPs should contact SCE's ESP Services group directly with
questions or if there appears to be an error in the posted data.  This
will allow us to maintain a formal record of your inquiry and insure
adequate follow-through.  A courtesy copy or e-mail note to Cyrus
regarding any inquiry directed to ESP Services would be appreciated.

At an ESP open house, SCE distributed a protocol which sets forth the
specific procedures which ESPs (or their SCs) should use for determining
hourly usage for customers with cumulative meters.  A copy of this
protocol is attached for your reference.  ESPs with questions regarding
implementation of this protocol should contact SCE's ESP Services group.

 
Currently, we are posting data with approximately a three-day lag.  That
is, data for a Monday (24 hours ending at midnight), is being posted via
an overnight batch processing "run" which is submitted during the day on
Thursday, and available on Thursday PM/Friday AM.  Once we move to
production mode, the posting time will be speeded up to 62 hours.  That
is, our objective will be to make Monday's data available between 2:00
PM and 3:00 PM on Thursday.  We are not planning to process load
profiles over the weekend.  That is, Friday data will be posted the
following Wednesday (along with Saturday and Sunday data).  I realize
that at a workshop last February, we announced a goal of 48 hours for
posting DLP data.  If the schedule we are now planning to follow causes
any ESPs a significant hardship, please contact Robert Ramirez, who is
responsible for SCE's load profiling implementation.  Robert can be
reached via e-mail at ramirer@sce.com.  We would like to accommodate
reasonable concerns for timeliness of data flow; but of course we don't
want to add unnecessary costs or increase the potential for processing
errors.

Since load profiling was first raised as a market mechanism issue in the
original 1995 Direct Access Working Groups, it has been one of the more
contentious areas of direct access implementation, resulting in
seemingly endless, and sometime fractious discussions.  I appreciate
everyone's endurance and good spirits in getting us to where we are
today.

Lp_prot.doc