Electric Transmission Texas Brings Largest Utility-Scale Battery
in the United States to One of Oldest Cities in Texas
8, 2010 - PRNewswire
Electric Transmission Texas, LLC (ETT)
dedicated the nation's largest, and Texas' first, utility-scale battery today
during ceremonies in Presidio, one of the oldest cities in Texas.
NAS(R) sodium-sulfur battery system was energized March 31 to the Electric Reliability
Council of Texas grid.
ETT is a joint venture between subsidiaries of American
Electric Power (NYSE: AEP) and MidAmerican Energy Holdings Company.
battery system represents part of an approximately $70 million overall commitment
by ETT to improve transmission reliability in Presidio and surrounding areas.
The dedication ceremonies recognized installation of the new battery system and
thanked local and state leaders for the support that helped achieve approval from
the Public Utility Commission of Texas (PUCT).
Full utilization of the battery
system, along with the recently completed Gonzales Substation, is expected to
begin by this summer in time for summer peak usage. Cost of the battery and substation
is approximately $25 million. A 60-mile, 69-kilovolt transmission line from Marfa
to Presidio is targeted for completion by 2012 with an estimated cost of $45 million.
In March, ETT filed an application with the PUCT requesting a Certificate of Convenience
and Necessity authorizing construction of the transmission line.
In the meantime,
the NAS battery system will provide transmission backup in the event of a transmission
line outage. The battery system also is designed to improve power quality and
reduce voltage fluctuations.
"Very soon, one of the oldest cities in the United
States will begin benefiting from one of the world's newest technology developments,"
said Calvin Crowder, ETT president. "This battery installation will enhance electrical
service for our customers in this region, and completion of this milestone will
allow the Presidio area to realize its full benefits by this summer."
battery system installed in Presidio will provide the following benefits:
Due to its quick response, the battery will address voltage fluctuations and momentary
- In the event of an outage on the radial transmission line providing
power to Presidio, the battery can supply four megawatts of uninterrupted power
for up to eight hours.
- The battery will allow Presidio's electrical load
to receive uninterrupted power from Comision Federal de Electricidad (CFE) during
emergency situations. - The battery will allow for maintenance on the new transmission
line being built from Marfa to Presidio without loss of electric service.
battery modules were transported by ship from NGK-Locke, Inc. in Japan and delivered
to the Port of Long Beach in December 2009. Twenty-four trucks were then used
to carry the 80 modules and ancillary equipment from California to Marfa, Texas,
where they were stored until construction of the concrete building that now houses
the battery system was completed. The modules were moved to Presidio in February,
and installation activities began at that time.
The battery system is controlled
through an S&C Electric Company Smart Grid Storage Management System(TM), a fast-response,
automatic power converter and controller that provides the ability to store energy
in a variety of battery storage technologies and to control the discharge of that
power into the electrical grid.
AEP pioneered the use of the NAS battery in
the United States. Following testing at its Dolan Technology Center near Columbus,
Ohio, AEP became the first U.S. company to deploy NAS batteries when it installed
and operated a demonstration unit in Gahanna, Ohio, in 2002. In 2006, AEP installed
a 1.2-megawatt stationary NAS battery near Charleston, W.Va. In 2008, AEP installed
three, 2-megawatt NAS batteries: one in Churubusco, Ind.; one in Balls Gap, W.Va.;
and one in Bluffton, Ohio.
ETT acquires, constructs, owns and operates transmission
facilities within the Electric Reliability Council of Texas, primarily in and
around the AEP Texas Central Company and AEP Texas North Company service territories.
AEP, headquartered in Columbus, Ohio, is one of the largest electric utilities
in the United States, delivering electricity to more than 5 million customers
in 11 states. AEP (www.aep.com) has extensive experience building extra-high-voltage
765-kV transmission lines and owns the nation's largest electricity transmission
system, a nearly 39,000-mile network that includes 2,100 miles of 765-kV transmission
lines, more than all other U.S. transmission systems combined.
Energy Holdings Company (www.midamerican.com), based in Des Moines, Iowa, is a
global provider of energy services to more than 6.9 million customers worldwide.
MidAmerican Energy Holdings Company subsidiaries, PacifiCorp and MidAmerican Energy
Company, own and operate more than 18,000 miles of electric transmission lines.
SOURCE Electric Transmission Texas, LLC