BHEL's R&D develops HTSC transformers

Bharat Heavy Electricals Limited (BHEL) Corporate R&D Division has developed, manufactured and tested a High Temperature Superconducting (HTSC) Transformer.

The availability of bismuth-based HTSC wire commercially has opened new opportunities for the manufacturers of power system equipment world over, a BHEL release said here on Wednesday.

The new 1.0 MVA, Three phase 33/6.6 transformers have Higher efficiency, are smaller in size, weight and volume, can withstand twice the capacity overload without insulation damage or loss of useful life, have lower impedance and better voltage regulatio n capability than regular transformer and do not require cooling oil like conventional transformers, thereby eliminating the possibility of oil fires and related environmental hazards and provide more power per unit volume in existing substations, the re lease added.

The developed HTSC transformer has a conventional core at room temperature. HV and LV coils are made of HT superconductors immersed in liquid nitrogen, the release said. HTSC transformers are designed for greater current density than copper winding making the size of coil much smaller, the release added. - PTI



ref:
http://www.thehindubusinessline.com/blnus/02091560.htm