GE Research and Prolec GE Power Up World’s 1st Large Flexible Transformer to Enhance the Resiliency of America’s Grid

  • 100MVA flexible transformer has begun a 6-month field demonstration at a Cooperative Energy substation in Mississippi as part of a project through the U.S. Department of Energy’s Office of Electricity
  •  Represents next generation of hardware required to support higher penetrations of renewable power on the grid
  • Will improve grid resiliency by offering more flexibility for fault management, frequency and voltage regulation through an online adjustable impedance
  • Poised to replace an aging U.S. transformer fleet, with >70% older than 25- years and ~15% already exceeding the average life expectancy of 40- years
  • Cooperative Energy is an electric cooperative which services 55 of Mississippi’s 82 counties and 437,000 homes and businesses

NISKAYUNA, NY –October 18, 2021 – In what represents a major step toward modernizing the foundation of our nation’s grid, GE Research and Prolec GE have teamed with Cooperative Energy to develop and install the world’s 1st flexible large power transformer at the utility’s major substation in Columbia, Mississippi. This substation is part of a service network that delivers power to nearly a half million homes and businesses across Mississippi.

World’s 1st Large Flexible Transformer (Video) 


The transformer, rated at 165kV, 60/80/100 MVA and developed as part of an ongoing project funded through the U.S. Department of Energy’s (DOE) Office of Electricity, has begun six months of field validation to assess its performance and understand how this new technology could transform grid management in the future.


Transformers are part of the backbone of electricity grids, regulating the flow of power from generation plants, where electricity is produced, through transmission and distribution power lines to be delivered to people’s homes and businesses. Historically, the existing infrastructure has performed reliably well. But as higher percentages of renewables like wind and solar power come online, new transformers, with much greater flexibility in impedance, will be required to support the grid in voltage regulation, stability, fault management, and transmission lines restoration and resiliency. This new large flexible transformer technology is poised to help meet this need.


“The Department of Energy’s $2.4 million investment to develop this first-of-its-kind flexible transformer will help make the grid more resilient to severe weather events, more secure from cyberattacks, and handle more clean energy sources to power the places we live and work,” said Secretary of Energy Jennifer M. Granholm. “It’s yet another example of the innovation that’s possible when the public and private sectors collaborate to build new technologies here at home that improve the well-being of the American people.”


“Strengthening our grid and facilitating the transition to a more renewable-intensive energy portfolio will require a more flexible infrastructure, including transformers, to manage the wider range of voltage and frequency oscillation that utility operators will see,” said Ibrahima Ndiaye, Technology Manager at GE Research Center and project leader. “Our flexible large power transformer, a world- first, will deliver unprecedented flexibility to not only manage more dynamic grids, but do so in a way that could revolutionize the resiliency of the grid in fault management, spare coverage and adaptability for grid restoration.”


“Cooperative Energy, as a member-focused electric cooperative, is continually working to update and maintain our transmission system, thus ensuring its resilience and reliability,” said Jeff C. Bowman, president and CEO of Cooperative Energy. “Advanced hardware and grid components such as the flexible large power transformer will help us meet many of the challenges our industry faces, now and in the future, and ensure reliable service. It is an exciting opportunity for Cooperative Energy to aid in advancing the modernization of the nation’s electric grid.”


“After all the research, development and thorough testing, the new flexible transformer technology has begun a field validation to authenticate its performance and demonstrate how this technology could lead to a major grid management change, said Pedro Puente, R&D Director at Prolec GE. “It is exciting for us to participate in the transformation of the nation’s electric grid, identifying the challenges and the opportunities that led us to create one of the next-generation technologies for the efficient, resilient, and reliable delivery of electricity. The innovative flexible impedance technology has been successfully patented.”


The world’s 1st large flexible transformer installed and undergoing field validation at Cooperative Energy’s major substation in Columbia, MS. Photo credit: Cooperative Energy


Ndiaye noted that the introduction of new transformer technologies is coming at a pivotal time for the nation’s grid infrastructure. Today, more than 70% of the U.S installed large transformer base (>60MVA) is 25-years or older, with around 15% exceeding the average life expectancy of 40 years. Gradual replacement of the existing fleet with more flexible power transformer solutions would greatly expand the grid capacity and accommodate more renewable resources and highly variable loads.


GE Research has been working closely with the Prolec GE team to develop the flexible transformer technology and partner with Cooperative Energy on the field demonstration.


About GE Research
GE Research is GE’s innovation powerhouse where research meets reality. We are a world-class team of scientific, engineering and marketing minds working at the intersection of physics and markets, physical and digital technologies, and across a broad set of industries to deliver world-changing innovations and capabilities for our customers.


About Prolec GE
Prolec GE designs, manufactures, and sells products and solutions for the generation, transmission, and distribution of electrical energy. With more than 50 years’ experience in the industry, Prolec GE is an important player and a key participant in the manufacturing market with business units in the United States, Mexico, and Brazil. It has an installed base in more than 35 countries and employs more than 6,800 people.


About Cooperative Energy
Cooperative Energy generates and transmits electricity to 11 Member-owned electric distribution cooperatives. Known as the Power of 12, Cooperative Energy and its Member cooperatives work together to provide safe, reliable, and affordable power from the Mississippi Delta to the Coast. The 11 electric cooperatives own and maintain more than 57,000 miles of distribution lines and provide service to approximately 437,000 homes and businesses throughout 55 counties.


For media inquiries, please contact:
Todd Alhart
GE Research


Cooperative Energy Participation:
Sara Peterson
Cooperative Energy
601.705.6614 – Office
601.297.3419 – Cell