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Enron Mail |
Ilan,
In order to calculate the VA we need the actual VisuPro counter data since we are using an assumed formula for the Vestas Availability. (See attached for this year 2002 VA): Note this report was an interim report and the "EA" values used for comparison does include the 90 day ramp up time and the Trent leaning towers. With regard to the German turbines: If the German team has summarized data then we could make the calculation, with some simplifying assumptions, for the year 2001 on the German turbines and extend the graph. By summarized data I am talking about a summation of each of the counter values for all of their turbines for all of the months during last year. (This is not totally unreasonable, we could provide this data for turbines in the US very quickly but that is because we have the data in an Oracle database.) If, however, the data comes to us as individual VisuPro files it would be impossible to assimilate and produce the report before AWEA. In fact I would not recommend trying to produce this number even after AWEA because of the complexity of the process. We will pose the question to the German team but I am not optimistic that they have summarized counter data. Best Regards, Hollis * One simplifying assumption goes back to the fact the European VisuPro SCADA system has 4 counters which are defined differently than the 7 US counters. We would need to assume the German grid never went down and was always available. If we were unable to make this assumption then we would need to load all the error messages from each individual turbine in Germany and isolate the time associated with grid events (i.e. error messages 8 Overvoltage 9 "Undervoltage", 10 "Underfrequency", 11 "Overfrequency", 116 "Line fault voltage", 117 "Line fault frequency") and back that time out of RT and apply it to SOT. From: Ilan Caplan on 05/17/2002 09:29 AM To: Benjamin Bell/EWC/Enron@ENRON cc: Hollis Kimbrough/EWC/Enron@ENRON, Mark V Walker/EWC/Enron@ENRON Subject: Re: April Availability Ben - Two issues remain, in order to graph the data as you requested: 1) 2001 Vestas Availability would need to be calculated, 2) We don't have the VA calculation for Germany, only the US. I will put a graph together, nonetheless. Hollis - Is it possible to get the two questions above answered? Thanks, Ilan Benjamin Bell 05/16/2002 06:56 PM Sent by: Benjamin Bell To: Ilan Caplan/EWC/Enron@Enron cc: Mark Eilers/EWC/Enron@ENRON, Alan Nueman/EWC/Enron@ENRON Subject: Re: April Availability Nice work IIan. Would it be possible to get it in graphical form like you did on 05/14? I would like to use a chart of the Vestas Availability on the GEWE 1.5 at AWEA 2002. Best regards, Ben
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