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Electric Energy T&D - Index

Electric Energy T&D - EEMag March / April 2008 - Index

Circle 37 on Reader Service Card
3 I March-April 2008 Issue
• Devices changing state most often, sorted by frequency.
This allows a quick drill down to see which field points
require maintenance.
• Alarm limits most frequently violated, also sorted by frequency.
This report can be used to check that alarm limits are appropriate,
or quickly see which devices are most often operating beyond
preset limits.
These reports also allow users to drag and drop columns so
they can organize the data any way they want; for example: by
substation; by device; by date; by area of responsibility; or any
other column.
Additional sophisticated reporting providing mathematical analysis
of analog values is under development. These reports include:
• Analogs that are mathematically erratic using statistical methods
• How long individual devices operate at or near typical
operating limits, and by how much
Further analysis based on pattern recognition, applied to the
power system data store, will be used to look for patterns,
statistical advantages, and inference between variables.
This area provides an exciting chance to break new
ground in real-time analysis of the Entergy power system in the
coming years.
The solution provided to Entergy is a low maintenance, industrial
quality platform that enables:
• Ready access to a vast storage of historical data and events
• Forensic analysis of major electrical grid events
• Preventive maintenance insights and benefits
• High-integrity automated auditing
Being able to specify real world requirements, in addition to
functional needs, and getting a solution designed and implemented
around those requirements has made this project a success while
also helping to alleviate Entergy’s resource constraints.
About the Authors
Paul Cassingham is Manager of Application Management for
Entergy’s Transmission Business Unit and is responsible for
EMS/SCADA and related applications that support engineering,
operations and maintenance functions within Transmission. Paul
holds a Bachelor of Science degree in Computer Engineering
from Iowa State University and has over 27 years of experience
with EMS/SCADA systems for Entergy.
David Allen has 30 years of experience in real-time data collection.
After many years with Texas Instruments and more recently, Areva
T&D, he is now a Senior Consulting Engineer with Nobadeer
Software, Inc. of Longmeadow MA. David holds a Master’s degree
in Computer Science from the University of Washington.