Tech Briefs Magazine - April 2024 - 25
vide electricity before upstream power is
restored. One way to do this is with a microgrid,
which distributes electricity to
small areas such as a few buildings or a
town - although the size of the microgrid
can vary.
The microgrid can be connected to
the main power utility source, but also
can function while disconnected in " islanding
mode, " self-supported by alternate
energy sources and unaffected by
the issues impacting the main utility.
Zhang's research team focuses on optimizing
how microgrids pull from these
various alternate sources such as renewables,
generators, and batteries to restore
power quickly and correctly.
" Essentially, we want to bring the power
generation closer to the demand side
in order to get rid of the long transmission
lines, " Zhang said. " This can improve
the power quality and reduce the
power losses over the lines. In this way,
we will make the grid smaller, but stronger
and more resilient. "
To optimally operate microgrids,
Zhang's lab developed an AI-based technique
called deep reinforcement learning,
the same concept that underpins
Microgrids can take advantage of local renewable energy sources to restore power in outages, such
as these solar panels at the UCSC East Remote parking lot. (Image: Nick Gonzales)
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large language models, to create an efficient
framework that includes models of
many components of the power system.
Reinforcement learning depends on rewarding
the algorithm for successfully responding
to the changing environment
- so an agent is rewarded when it is able
to successfully restore the demanded power
of all components of the network. They
explicitly model the practical constraints
of the real-world system, such as the branch
flows that power lines can handle.
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Tech Briefs, April 2024
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Tech Briefs Magazine - April 2024
Table of Contents for the Digital Edition of Tech Briefs Magazine - April 2024
Tech Briefs Magazine - April 2024 - Intro
Tech Briefs Magazine - April 2024 - Sponsor
Tech Briefs Magazine - April 2024 - Cov1
Tech Briefs Magazine - April 2024 - Cov2
Tech Briefs Magazine - April 2024 - 1
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Tech Briefs Magazine - April 2024 - 16A
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Tech Briefs Magazine - April 2024 - 16D
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Tech Briefs Magazine - April 2024 - Cov3
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Tech Briefs Magazine - April 2024 - MD-Cov1
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Tech Briefs Magazine - April 2024 - MD-Cov3
Tech Briefs Magazine - April 2024 - MD-Cov4
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