POWER August 2012 - 31

2012 PLANT OF THE YEAR
Table 3. Major contractors and equipment suppliers to the Angamos
project. Source: AES Corp.
What
Plant engineering and design
Plant construction
Steam generator
Steam generator erection
Steam turbine generators
BESS battery supplier
Cooling tower
Fabric filter
Material handling
Semi-dry flue gas desulfurization
Distributed control system
Sootblowers, furnace wall cleaning
Condensers
Feedwater heaters
Condensate pumps
Boiler feedwater pumps
Fuel handling
Auxiliary transformers
Large power transformers
Dry ash handling
Wet ash handling
Limestone preparation
Water systems
Who
Hyundai Engineering Co., Ltd.
Sigdo Koppers S.A.
Doosan Heavy Industries Co., Ltd.
Ansaldo Energia/Sigdo Koppers S.A.
Ansaldo Energia
A123
Hamon Korea
STX
Baekdoo
Gia Niro/STX
Emerson Korea Inc.
Doosan HHI
Bumwoo Eng. Co., Ltd.
Bumwoo Eng. Co., Ltd.
Hyundai Heavy Industries Co., Ltd.
Hyundai Heavy Industries Co., Ltd.
Posco Machinery & Engineering Co., Ltd.
Hyundai Heavy Industries Co., Ltd.
Hyundai Heavy Industries Co., Ltd.
Baekdoo Industry Machinery Co., Ltd.
Baekdoo Industry Machinery Co., Ltd.
Niro/STX
GTF/GE
4. Battery storage lockers. Inside the Angamos BESS are about one million advanced
lithium-ion battery cells, divided between 10 2-MW battery containers and five
4-MW power controls containers-plus the power electronics to manage the system operation.
Courtesy: AES Corp.
Table 3 lists the major contributors to
the success of Angamos.
Because Chile is seismically active, the
plant was designed to withstand a mediumintensity
earthquake without tripping the
plant offline. Should a severe earthquake
occur, the plant design includes features
that will minimize the length of a forced
outage.
Buy the BESS
In close proximity to the Angamos plant,
a 20-MW high-efficiency lithium-ion battery
energy storage system (BESS) was
installed. The advanced reserve capacity
provided by the BESS enables Angamos
to generate an additional 20 MW-that
would otherwise be tied up to maintain
the plant's grid spinning reserve-for up
to 15 minutes virtually any time of the
year. (Spinning reserve is used during an
unexpected transmission loss, the failure
of a power generator, or another accident
that might otherwise necessitate reducing
power to customers.) This " hybrid " part
of the plant allows the plant to reduce the
mandated spinning reserve, thus allowing
the plant to operate at increased load. The
BESS increases generation from the Angamos
plant by 4%, or about 130 GWh each
year. The BESS entered commercial service
in May 2012 (Figure 4).
The Angamos project built on the success
of an initial partnership between AES
Gener and AES Energy Storage, both subsidiaries
of AES Corp., to develop and install
a 12-MW BESS associated with AES
Gener's Norgener power plant, also in the
SING, 172 km from Angamos, in only 15
months.
" As one of the largest power generators
in Chile, we're consistently looking for
ways to unlock [the] value of our existing
plants while maintaining grid reliability
and flexibility, " said Felipe Ceron, CEO
of AES Gener. " Since 2009, we've been
working with AES Energy Storage to free
up generating capacity at our Norgener
plant by employing a battery-based installation
to meet the power system's obligations
for spinning reserve. That project has
been in commercial operation for nearly
three years, and we're now applying the
service on a larger scale with Angamos. "
AES Energy Storage worked with AES
Gener throughout design, development,
and installation of the Angamos BESS.
Both entities worked with the CDEC-SING
operator and other partners to configure
the Angamos BESS to meet performance
requirements of the electrical system operator
and enable it to respond autonomously
within established parameters. The BESS
32
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