Message-ID: <373806.1075840448686.JavaMail.evans@thyme> Date: Thu, 20 Jun 2002 00:15:00 -0700 (PDT) From: jeff.duff@enron.com To: mark.fisher@enron.com Subject: Re: Feb Curtailment, cont'd Mime-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 7bit X-From: Jeff Duff X-To: Mark Fisher X-cc: X-bcc: X-Folder: \mark fischer 7-12-02\Notes Folders\All documents X-Origin: FISCHER-M X-FileName: mark fischer 7-12-02 LNotes.nsf FYI ---------------------- Forwarded by Jeff Duff/EWC/Enron on 06/20/2002 07:29 AM --------------------------- Kurt Anderson 06/19/2002 05:28 PM To: Jeff Duff/EWC/Enron@ENRON cc: Subject: Re: Feb Curtailment, cont'd ---------------------- Forwarded by Kurt Anderson/EWC/Enron on 06/19/2002 05:43 PM --------------------------- wcmarshall@aep.com on 06/19/2002 12:49:04 PM To: peter.simpson@garradhassan.co.uk, keir.harman@garradhassan.co.uk, kurt.anderson@ps.ge.com cc: jfgodfrey@aep.com Subject: Re: Feb Curtailment, cont'd David has compared the ERCOT production data with the 10 min SCADA data. ?See the results below. Ward C. Marshall Director, Business Development AEP Energy Services, Inc. Office (614) 583-6607 Fax ? ? (614) 583-1627 Cell ? ? (614) 736-6022 Mailing Address: PO Box 16036 Columbus, OH 43216-0036 Physical Address: 155 W. Nationwide Blvd. Suite 500 Columbus, OH 43215 ----- Forwarded by Ward C Marshall/AEPIN on 06/19/2002 03:45 PM ----- David F Matson 06/19/2002 02:46 PM ? ? ? ? ? ? ? ? To: ? ? ? ?wcmarshall@aep.com ? ? ? ? cc: ? ? ? ? ? ? ? ? Subject: ? ? ? ?Re: Feb Curtailment, cont'd Ward: I have added a tab on the previous file (attached here), with 15-minute intervals, from the ERCOT data. ?If you check the tab with the total of each curtailment period, you will see numbers similar to the 10-minute data, and a total at the bottom of the table that is roughly the same. What does this mean? ?I suppose it shows that the 10-min data was as accurate as the 15-min data, and that the innaccuracies come from some other source, such as log entries, which turbines were actually curtailed, etc. ?I noticed at least a couple of time when the number of turbines listed in the outage table does not match the list of individual turbines, and when the number of hours does not match the start and end times of the curtailed periods. I think this at least answers one of the questions about which data set can be used. I'm hopeful that looking at each hour of both techniques shows a small difference over the whole month will prove to be useful. David -- David F. Matson Consulting Meteorologist ? ? ? 1650 Saint Lawrence Way Pleasant Hill, CA ?94523 925-933-7505 (voice & fax) dfmatson@attbi.com - CURTAIL-Feb2002-temp.xls