Tech Briefs Magazine - September 2024 - 11

Q & A
Data Library Enables Analysis of Electric Grid Issues
Dr. Aaron J. Wilson and his team at Oak
Ridge National Laboratory, Lawrence Livermore
National Laboratory, and Pacific
Northwest National Laboratory have developed
The Grid Event Signature Library -
an open-access online collection of datasets
containing waveforms that are visual representations
of behaviors of the electric grid,
which can help analyze anomalous events.
Tech Briefs: How would you describe this project?
Aaron Wilson: The Grid Event Signature Library is a go-to resource
for people to look at how some waveforms have behaved
on the power grid so that they would know what to look for on
their own systems.
Tech Briefs: Do you have a standardized way of
classifying the waveforms and labeling the associated
events?
Wilson: We put together a hierarchical system that encompasses
everything we have, both from our data and what we
have from general domain knowledge about power systems. We
then came up with a taxonomy that's fairly uniform across our
entire set of data. It has three layers, we call groups, classes, and
subclasses. Groups are the very high-level kinds of categories,
things like which phases are affected on the power system -
you typically have three phases. There's a group called conditions,
where you would find things such as natural disasters and
weather-related events. Underneath those in classes and subclasses
is where you start to get to drill down into the more
specific categories.
For example, we might have a category called " conditions "
as the group, and then we might have " weather " as the class,
and then the subclass might be " lightning storm. "
Tech Briefs: What can a user do with this information?
Wilson: The user can create an account to gain access to
what we call our dashboard. From there you can use different
query criteria to find events in our library. Inside the dashboard,
you can see information related to the data, such as date
and time; the textual description that was provided to us; the
sampling rate at which it was reported; and the type of sensor
that was used to record it.
Suppose I'm an operator, and I see this weird thing that happened
in my data and I'm trying to figure out what it is or what
it represents because something bad happened as a result. I
might say, " I think it's arcing, " then I can go in and search " arcing "
and look at what my waveform looks like and what the
arcing data looks like in the database and say: " Are these similar?
Oh, that looks like it's pretty related, that might be it. " Or
it might help to rule that out.
Tech Briefs, September 2024
www.techbriefs.com
11
If you think you see what we would call an incipient failure, if
you've seen a pattern that might indicate future arcing, you can
match it against something in the database and you're able to stop
it before it breaks down an insulator or damages equipment. That
would be quite valuable - arcing is a hard anomaly to detect.
Tech Briefs: Who are you hoping will provide more
data?
Wilson: We always want data from utilities because they typically
have things that are more representative of the real world.
We could simulate as much data as we want, but at the end of
the day they don't cover all of the corner cases that you might
see in the real world. And so, everything we have in here right
now is from real sensors that have recorded data in the field, it's
not simulated from a program. There is value in simulated
data, but we can't capture all anomalous behaviors in simulation
without really knowing the physics of every circuit out
there in the country and the world.
To read the full interview, visit www.techbriefs.com.
https://www.techbriefs.com http://info.hotims.com/86259-717 https://www.techbriefs.com

Tech Briefs Magazine - September 2024

Table of Contents for the Digital Edition of Tech Briefs Magazine - September 2024

Tech Briefs Magazine - September 2024 - Intro
Tech Briefs Magazine - September 2024 - Sponsor
Tech Briefs Magazine - September 2024 - Cov1
Tech Briefs Magazine - September 2024 - Cov2
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Tech Briefs Magazine - September 2024 - Cov3
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