ABB announced it has developed, manufactured and energized a 1,200-kV ultra-high-voltage power transformer to
support India’s plans to build a 1,200-kV transmission system,
supplementing the existing 400-kV and 800-kV transmission
grid as demand for electricity increases. The transformer was
manufactured and tested at ABB’s Vadodara facility in India.
This 1.2-million-volt transformer represents the highest alternating current (AC) voltage level in the world and is installed
at the national test station at Bina, Madhya Pradesh in central
India. It is part of a collaborative initiative by the country’s central transmission utility, Power Grid Corp. of India.
India’s geographic span means that resource-rich generation
centers and urban and industrial load centers are often far apart
therefore requiring efficient power transmission. Along with the
country’s commitment to increase renewable energy sources,
these factors are driving the development of an ultra-high-voltage transmission infrastructure.
The 1,200-kV transmission system will help strengthen the
grid and enhance load capacity up to 6,000 MW. Transmission
at higher voltages enables larger amounts of electricity to be
transported across longer distances, while minimizing losses.
At the same time, less space is needed for fewer transmission
lines, which reduces the environmental impact and overall cost.
In addition to the transformer, ABB has also developed a
ABB Charges Transformer at Record 1. 2 Million Volts in India
1,200-kV circuit breaker that was previously commissioned
at the test station. This was the first hybrid gas insulated
switchgear in the world to be energized at this voltage level.
The uniquely designed circuit breaker is safely housed with the
disconnector in a tank filled with insulating gas—resulting in
a space saving potential of up to 60 percent compared with
EYE ON THE WORLD
Brazilian power utility CEB (Companhia Energetica de
Brasilia) awarded Saft a contract to design, manufacture and
supply nickel backup battery systems for all 34 distribution
substations serving Brasilia, the country’s capital city. The Saft
Uptimax batteries are replacing the existing lead-acid batteries
at the CEB substations to provide a significant increase in reliability and availability while reducing battery maintenance and
Brasilia is the capital of Brazil and the seat of government for
the country’s Federal District. CEB controls electric power distribution, generation and transmission assets covering an area of
over 2,040 square miles, providing service to more than 990,000
clients and nearly 2.9 million residents.
The substation backup batteries play a critical role for CEB by
ensuring a continuous 125 V supply to support all the auxiliary
loads such as switchgear, automation and protection circuits
for up to 10 hours if there is an interruption to the main power
supply. Previously, the substations were fitted with lead-acid
batteries, however, this is a particularly demanding application
with ambient temperatures reaching 35 C, contributing to the
risk of unpredictable, premature battery failure.
To ensure total reliability of its backup systems, CEB has imple-
Saft Designing Backup Nickel Battery Systems for Brasilia Substations
mented a one-year program to replace the batteries at all 34 of its
distribution substations with Saft Uptimax batteries. These batteries are designed to operate reliably even at elevated temperatures.
“Ensuring continuity of customer supply is a mission critical
aspect of CEB’s power distri-
bution business. That’s why we
have made the decision to pur-
chase nickel backup batteries for
the first time in our company
history,” said Arthur Franklin,
substations maintenance man-
ager of CEB. “This switch to Saft
batteries gives us renewed confi-
dence that our substation back-
up systems will always perform
as required, whenever they are
Each CEB substation will
be fitted with two battery banks, so Saft is supplying a total
of 68 Uptimax systems comprising 96 cells ranging in capacity
from 100 to 170 Ah. The first systems were delivered to CEB
in June 2016.