Alstom T&D India has completed the commissioning of one bay of a 220kV substation with its patented Optical Instrument Transformer for India’s first digital substation.

The substation located at Jambuva in the Vadodara district of Gujarat uses the company’s Compact Optical Sensor Intelligence (COSI-CT) range of instrument transformers.

Gujarat Electric Transmission Corporation, the state transmission utility, awarded the contract to Alstom as a pilot project.

Alstom T&D India managing director Rathin Basu said with the new COSI range of Optical Instrument Transformers, Alstom Grid is leading innovation in India.

"Alstom uses COSI-CT – a digital substation solution – to support the development of Smart Grids, allowing India’s emerging power grids to deliver more energy with greater flexibility in a more complex environment," Basu added.

The COSI range through optical ethernet connectivity digitalises current and voltage signals, increases accuracy, reduces use of copper cables, strengthens the reliability of the system, and facilitates current transformer sizing calculations.

It being SCADA ready brings smart grid intelligence to the substation and allows operational data exchange with the network dispatch centre.

The COSI range products were manufactured at Phoenix, US and were locally supported by Alstom’s instrument transformer unit in Hosur and substation automation solution unit in Pallavaram in the State of Tamil Nadu.