NYISO Transition Rate Validation White Paper

by ronfluegge 1. June 2012 16:35


Dr. Singh has concluded that the GADS OS has implemented Method 2 as intended and the software appears to be producing the expected transition rates.

Based on Dr. Singh’s findings in conjunction with the EFORd comparisons, the NYISO has concluded that MARS state transition rate matrices whose probabilities are consistent with concept of the unit being demanded as specified in Method 2 has been successfully implemented.

The objective of the EFORd calculation is to:

1. Find the time spent in various states during demand

2. Converting these times into conditional probabilities

3. Adjusting the times in derated states to equivalent times in the full forced outage state

This results in the LOLE calculation for MARS being based on EFORd and transition rate matrices that satisfy the conditional state probabilities of the units being demanded. The NYISO recommends that this approach be implemented for the upcoming IRM study

Transition Rate Validation White Paper.pdf (302.91 kb)

Microsoft Access

by ronfluegge 19. March 2012 12:05

On December 16, 2011 we send out an Update Bulletin with the following:

“If you plan on using Microsoft Access for your storing your GADS data, you cannot use Windows XP; however, you can use Windows Vista or Windows 7.  When datasets from Microsoft Access are loaded into SAP Crystal Reports, Crystal Reports generates the unhandled exception that we cannot trap or fix.  This only occurs when running Analysis & Reporting on Windows XP in combination with Access databases.  If you are not able to switch to Windows 7, we recommended using SQL Server 2005 Express or SQL Server 2008 R2 Express (with tools) instead of Microsoft Access (SQL Server Express is free from Microsoft).  We can assist in installing SQL Server Express on your machines if you would like to implement this solution.  Or you can change your machines to Windows 7.”

Since then we received Crystal Reports Runtime Service Pack 2 from SAP and have been testing it.  The service pack has fixed the above issue.

We are pleased to announce that you can again run the software using Microsoft Access on Windows XP.  We have tested it extensively and have installed it on several users’ machines that were not able to run it before.

Error says "Loading?"

by ronfluegge 22. February 2012 16:11

If you sent your January-December 2011 GADS data to NERC, Mike Curley might send you an Error Log for your units where the Error says "Loading?". 

It is indicating that the “Typical Unit Loading Characteristics” data field is missing.

For 2012, this performance data field is voluntary, but for 2011 NERC is expecting this field to be provided even though NERC has never, to the best of our knowledge, used the Typical Unit Loading Characteristics data for anything even though you submit it.

To provide the necessary data for 2011, simply check the “Write ALL Data Including Voluntary to NERC” box shown on the two other attachments, recreate the GADS 05/07 files, and resend to NERC.

Starting in 2012 you have the option to send to NERC the full data set or just the mandatory data by respectively checking or not checking that box. 

Once you have either checked it or unchecked it, the software saves your “last” setting so that it will have the same setting the next time you run the software.

Welcome to the GADS Open Source blog!

This will be an easy place to keep up on updates and news related to GADS and the GADS Open Source software.

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