Bharat Heavy Electricals Limited (BHEL) has indigenously developed India’s first 1200 kV Ultra High Voltage Alternating Current (UHVAC) Transformer of 333 MVA rating.
The Transformer has been developed, manufactured and successfully tested by BHEL entirely through in-house know-how. With its successful development and type testing as per international standards, India joins a select band of countries in the world possessing this technology.
The development of the 1200 kV UHVAC transformer is the outcome of two years of rigorous research by the engineers of BHEL, the company said. “The technology for such leading-edge products is specific and available with very few manufacturers worldwide and is zealously guarded and not available for transfer. BHEL had to develop each facet of the technology through in-house R&D efforts to develop a product that is comparable to the best in the world,” it said. The transformer has been manufactured under a controlled environment using the contemporary, state-of-the-art manufacturing and testing facilities at the newly constructed transformer block in BHEL’s Bhopal plant to meet stringent quality requirements for operation of such transformers.
BHEL had signed an MoU with PowerGrid for development of this transformer which is also the largest equipment used in a substation. The 333 MVA, 1150/400/33 kV, single-phase, Auto Transformer successfully developed by BHEL shall be installed in India's first experimental 1200 kV National Test Station at Bina (MP) being set up by PowerGrid.
This is a major milestone for India towards self reliance in UHVAC transmission systems. Having introduced 765 kV as the highest transmission voltage, the country is aspiring to shift to 1200 kV voltage transmission networks during the XIIth plan period. A large network comprising 1200 kV transmission superhighways is being planned as part of the National Transmission Network.
BHEL has also recently successfully tested and despatched India’s first indigenously developed 500 MVA, 765 kV Transformer for a substation project being set up in Western India by PowerGrid. In addition, the company has manufactured and installed a 1200 kV, 180 MVA Transformer to be used as a testing transformer in its UHV Test Laboratory at Bhopal.
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