Message-ID: <16571743.1075848308530.JavaMail.evans@thyme> Date: Wed, 24 Jan 2001 01:59:00 -0800 (PST) From: kdonohoo@ercot.com To: parviz.adib@puc.state.tx.us, tac@ercot.com, isonp@ercot.com, rss@ercot.com, esc@ercot.com, tmos@ercot.com Subject: RE: ERCOT CSC Analysis & Meeting Agenda Cc: directors@ercot.com, managers@ercot.com, rso2@ercot.com, isoschedulars@ercot.com, 1systemplanning@ercot.com, danielle.jaussaud@puc.state.tx.us, eric.schubert@puc.state.tx.us, keith.rogas@puc.state.tx.us, richard.greffe@puc.state.tx.us, sid.guermouche@puc.state.tx.us Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Bcc: directors@ercot.com, managers@ercot.com, rso2@ercot.com, isoschedulars@ercot.com, 1systemplanning@ercot.com, danielle.jaussaud@puc.state.tx.us, eric.schubert@puc.state.tx.us, keith.rogas@puc.state.tx.us, richard.greffe@puc.state.tx.us, sid.guermouche@puc.state.tx.us X-From: "Donohoo, Ken" X-To: "Adib, Parviz" , 1 2001 TAC and others , 1 Retail Users Group Ad Hoc Subcommittee , 1 RSS , 1 ESC , 1 TMOS X-cc: 1 ERCOT Directors , 1 ERCOT Managers , 1 ERCOT Security Operators , 1 ERCOT Schedulers , 1 System Planning <1SystemPlanning@ercot.com>, "Jaussaud, Danielle" , "Schubert, Eric" , "Rogas, Keith" , "Greffe, Richard" , "Guermouche, Sid" X-bcc: X-Folder: \Doug_Gilbert_Smith_Nov2001\Notes Folders\All documents X-Origin: GILBERTSMITH-D X-FileName: dsmith.nsf Parviz, complete information to answer your questions is not part of our current systems at ERCOT. The operational systems do not archive/retain data. We are looking into what information we can gather but this may take some time. For the cost questions the only available data is redispatch for unplanned and planned service. It is posted in accounting reports and is available on the Internet at the following address: ftp://ftp.ercot.com/unplannd/redispth/uredispt.htm l ftp://ftp.ercot.com/planned/redispth/redispth.html Realignment is at owner's cost and ERCOT does not receive/collect this information. It will be very hard to determine total impact without this information. Steve Myers, Security Operations Manager and his staff are looking into available data to answer the operational questions. Some information relating to unplanned transactions is available in the "Monthly Transmission Market Operations Reports" available on the Internet at the following address: ftp://ftp.ercot.com/unplannd/mtmorept/mtmorept.htm In addition, past performance of the system does not denote future performance. Generation and transmission are changing on the system every year. Traditional methods of analysis using known generation resources and pairing them with known load are no longer possible. There is significant uncertainty in the existing generation that will be displaced by the addition of new generation. There is significant uncertainty regarding how their operation affects existing resources and the transmission system. The CSC calculations we provided are trying to simulate these possible transactions and determine the limitations with the ERCOT stakeholders. Hope this helps. Thanks Ken D. -----Original Message----- From: Adib, Parviz [mailto:Parviz.Adib@puc.state.tx.us] Sent: Tuesday, January 23, 2001 1:23 PM To: 'Donohoo, Ken'; 1 2001 TAC and others; 1 Retail Users Group Ad Hoc Subcommittee; 1 RSS; 1 ESC; 1 TMOS Cc: 1 ERCOT Directors; 1 ERCOT Managers; 1 ERCOT Security Operators; 1 ERCOT Schedulers; 1 System Planning; Danielle Jaussaud; Eric Schubert; Keith Rogas; Parviz Adib; Richard Greffe; Sid Guermouche; Elec Transition Archives Subject: RE: ERCOT CSC Analysis & Meeting Agenda Thanks Ken. Is it possible for you, please, to have certain information when you come for this meeting. At this time, I have the following questions. If I come up with more, I will forward them to you in advance of the meeting. On a historical bases covering 1997 through 1999, and 2000 (if data is available), could you please provide the following annual information for ERCOT: 1. The total cost ($) impact of realignment (or redispatch) 2. The total cost ($) impact of realignment (or redispatch) by each of ten Control Areas 3. The total MW (or MWH) impact of realignment (or redispatch) 4. The total MW (or MWH) impact of realignment (or redispatch) by each of ten Control Areas 5. The number of times in which ERCOT relied on realignment (or redispatch) 6. The number of times in which ERCOT relied on realignment (or redispatch) for each of ten Control Area 7. Please break ERCOT related information in the above questions into Summer, Winter, and other periods. Thanks. Parviz. -----Original Message----- From: Donohoo, Ken [mailto:KDonohoo@ercot.com] Sent: Friday, January 19, 2001 12:14 PM To: 1 2001 TAC and others; 1 Retail Users Group Ad Hoc Subcommittee; 1 RSS; 1 ESC; 1 TMOS Cc: 1 ERCOT Directors; 1 ERCOT Managers; 1 ERCOT Security Operators; 1 ERCOT Schedulers; 1 System Planning Subject: ERCOT CSC Analysis & Meeting Agenda Importance: High Attached to this email is four files: CSC Meeting Agenda.doc CSC2001Analysis.zip - Zip Compressed Excel Workbook 01sum1sav.zip - Zip Compressed Load Flow Base Case PTI PSSE 26.2 SAV format 01sum1raw.zip - Zip Compressed Load Flow Base Case PTI PSSE 26.2 SAV format ERCOT System Planning has prepared calculations and data to support the identification of Commercially Significant Constraints (CSC). A meeting to discuss these calculations with stakeholders will be held: Wednesday, January 31 9:30 AM to 3:30 PM Red Lion Hotel in Austin (I35 & 290) The goal of this meeting is to identify which transmission system contingencies and limiting elements are commercially significant. After CSC's are determined at this meeting, ERCOT will develop a recommendation and present it to TAC at their February 7 meeting. We have also set up an email account to receive comments. Its email address is csccomments@ercot.com it will be available throughout this process to receive comments and input. Kenneth A. Donohoo, PE Manager of System Planning, Technical Operations ERCOT 2705 West Lake Dr. Taylor, TX 76574-2136 (512)248-3003, FAX(512)248-3082