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Mariani substation in assam upgraded to 400 kV

India, Assam: Power Grid Corporation of India Ltd (PGCIL) has upgraded Assam’s New Mariani substation, a government release said.

The substation has been upgraded from 220 kV switching station to a 400/220 kV substation with 2×500 MVA transformation capacity, 2×125 MVA (reactive) power compensation along with other associated bays under North Eastern Region Strengthening Scheme (NERSS-VI) project.

The New Mariani substation was originally commissioned in March 2013 in Jorhat district with 20 MVAR reactive power compensation capacity. With this upgradation, connectivity at 400 kV voltage level between 400 kV Misa substation, 400 kV New Mariani substation and 400 kV Kohima substation has been established.

The New Mariani substation has now become the first 400 kV substation of upper Assam. It will serve as a key station for catering to augmentation of power in upper Assam, Nagaland, Manipur and the entire North Eastern Region. This capacity addition will add efficiency and robustness, leading to supply of reliable power, the release said.

With the adoption of latest technological tools and techniques, enhanced use of automation and digital solutions, PGCIL has been able to maintain average transmission system availability of over 99 %, the release said. PGCIL currently has 172,104 ckm of transmission lines, and 264 substations with aggregate transformation capacity of 464,292 MVA.


Source: T&D India

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