POWER August 2017 - 32

SMART GRID AWARD
3. Storage management is an " essential component. " The storage management
system is the " essential component " of the TAC microgrid, according to S&C Electric's
Mike Edmonds. Four quadrant inverters handle the power flows that connect solar and storage
to the grid. Courtesy: S&C Electric Co.
cal as specific pieces of equipment must be
installed in a particular order. Additionally,
once installed, equipment did not always perform
as it was designed and thus the control
strategies and contingency programming had
to be adjusted to reflect the actual state of
the equipment. While this created interruptions
for the commissioning process, it also
ensured that the overall microgrid was able to
adapt to the final configuration. " The project
was up and running in December.
According to Ameren, the price tag for the
TAC microgrid was $5 million, and the total
budget was just slightly more than that,
as Ameren owned the building. The company
leases the solar and wind generation. Under
Illinois law, Ameren is unable to own generation,
so the microgrid is solely a test bed.
" We are not trying to put something back on
the grid, " said Pate.
stration for Oncor, a Texas distribution utility.
Take note, energy project developers.
Work began on the TAC project in April
2016, and the microgrid was ready for testing
in September of that year.
" While the project was conducted on a
tight timeline, " said S&C, " there were a
surprisingly small number of challenges.
The major challenge encountered during
this project was the commissioning process.
Commissioning was scheduled to take approximately
four weeks, but ended up taking
closer to 12 weeks. The coordination of the
various vendors, equipment installation and
testing was no small feat. The sequencing of
equipment installation and testing was critiAmeren
Illinois is a regulated gas and
electric delivery utility, based in Collinsville,
Ill., not far from its parent company, Ameren
Corp., located in St. Louis, Mo. Customers
of Ameren Illinois have retail choice of their
electrical supplier, while non-residential gas
customers can also choose their energy provider.
The service territory covers 43,700
square miles (about three-quarters of the
32
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POWER | August 2017

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POWER August 2017

Table of Contents for the Digital Edition of POWER August 2017

Contents
POWER August 2017 - Cover1
POWER August 2017 - Cover2
POWER August 2017 - Contents
POWER August 2017 - 2
POWER August 2017 - 3
POWER August 2017 - 4
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POWER August 2017 - Cover3
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