Message-ID: <22660127.1075840442148.JavaMail.evans@thyme> Date: Wed, 20 Mar 2002 12:24:00 -0800 (PST) From: harvey.kaura@enron.com To: mark.fisher@enron.com, patricia.hunter@enron.com Subject: SCADA Inconsistencies @ Mill Run Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-From: Harvey Kaura X-To: Mark Fisher, Patricia Hunter 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 Hi Mark, As promised. FYI See you tomorrow morning. Best Regards, HHK ---------------------- Forwarded by Harvey Kaura/EWC/Enron on 03/20/2002 08:35 PM --------------------------- Keith Warner 03/19/2002 04:48 PM To: Harvey Kaura/EWC/Enron@ENRON cc: Subject: SCADA Inconsistencies @ Mill Run ---------------------- Forwarded by Keith Warner/EWC/Enron on 03/19/2002 05:14 PM --------------------------- Phil Waddell 03/19/2002 02:32 PM To: Keith Warner/EWC/Enron@ENRON, Marion Horna/EWC/Enron@ENRON cc: Joe Thorpe/EWC/Enron@Enron, Kevin Cousineau/EWC/Enron@ENRON, Dave Schulgen/EWC/Enron@ENRON, Dan Lindquist/EWC/Enron@Enron, Jeff Maurer/EWC/Enron@ENRON, Mike Messier/EWC/Enron@ENRON Subject: SCADA Inconsistencies @ Mill Run Hi Keith, Please review the following request from Mr. Verkleeren. Inconsistencies with the grid downtime numbers at Mill Run. Frequent PMT circuit breakers trip events. The Mill Run site had an event on 03/17, prior to the inclement weather, where pad's 1,3,5,6,7&8 had the PMT circuit breakers open @ approximately 0900 but did not have any component failures and did not trip the SEL. Per our conversation and the follow-up E'mail on 3/18, Zilkha is looking for a report on the steps taken to minimize the low gearbox oil pressure faults. Best regards, Philo ---------------------- Forwarded by Phil Waddell/EWC/Enron on 03/19/2002 01:06 PM --------------------------- "Gary Verkleeren" on 03/19/2002 11:48:15 AM To: cc: "Rick Winsor" , "Mark Haller" Subject: SCADA Inconsistencies @ Mill Run Philo, After exporting and reviewing Mill Run SCADA data (Monthly Production file) for the running month, I observed several inconsistencies between turbines that do not make sense. Specifically, for the grid downtime realized over the weekend (a result of the ice storm) which you had the pleasure of sharing with me, there was a total of approximately 14 hours of grid downtime. The downtime began at 1930 on 3-17-02 and essentially ran until 0930 on 3-18-02. During this time I closed the breaker restoring grid power to the site at 2345 only to have the site trip again within the next 15 minutes. (This can clearly be seen by viewing the attached text file and looking at the line voltages, VA, VB, VC). The grid downtime calculated and reported on the Monthly file for turbines # 2, # 4 and # 7 is not even close to being correct. Please review the attached excel spreadsheet generated from exported SCADA data as verification. All of the other turbines are somewhat close to calculating the downtime correctly but there are still certain mysteries with those as well. As you are aware, nearly all of the main circuit breakers tripped at Mill Run at approximately 0930 on 3-17-02, this likely partially explains why there is some variability between grid downtimes being recorded. I say this because a total loss in power to the turbine is realized in this event and SCADA probably cannot differentiate between a main circuit breaker trip and a grid loss. I am requesting an explanation for the inconsistencies noted between grid downtime allocations per turbine as calculated by Visupro/SCADA. As a reminder, I am also looking for a report summarizing the measures taken to correct the low gearbox oil pressure faults, and feedback on why main circuit breakers are operating at both Mill Run and Somerset. The main circuit breakers were intended to be an added safety/protection feature and I was lead to believe that they would not operate on a regular basis. The main circuit breakers are tripping frequently, this suggests a possible safety concern and warrants immediate attention. I look forward to your response Best Regards, Gary <> <> Gary Verkleeren Zilkha Renewable Energy 68 Braddock Drive Ohiopyle, PA 15470 Office: 724 434-1542 Mobile: 724 554-0924 Fax: 724 434-1543 <> - MR SCADA 3-1-02 thru 3-18-02.xls - MR SCADA 3-1-02 thru 3-18-02.xls - MR SEL DATA 3-17-02 to 3-18-02.txt