Tamil Nadu Transmission Corporation

Tamil Nadu Transmission Corporation Limited, widely abbreviated as TANTRANSCO, is the electricity transmission system operator serving the Indian state of Tamil Nadu. It is owned by the Government of Tamil Nadu and operates as a subsidiary of TNEB Limited, the state electricity holding company created during the restructuring of the former Tamil Nadu Electricity Board. TANTRANSCO was established in November 2010 as part of that sector reorganization, which separated electricity-related functions into distinct corporate entities. The corporation's core role is to operate and maintain much of Tamil Nadu's high-voltage transmission network. Its responsibilities include the management of transmission substations and associated infrastructure used to move electricity from generating facilities and interconnection points toward the distribution system. The network supports the transfer of bulk power across the state before electricity is delivered to end users through distribution utilities. TANTRANSCO maintains the substations in Tamil Nadu that are not operated by Power Grid Corporation of India Limited, the national transmission utility. Its substation portfolio includes facilities at 400/230 kV, 230/110 kV, 110 kV, and 33 kV levels. Lower-voltage systems such as 22 kV and 11 kV are generally associated with distribution rather than the corporation's principal transmission role. The 66/11 kV configuration, which was used historically, is no longer identified as part of the current substation structure described for the organization. As a network utility rather than a consumer-facing product company, TANTRANSCO's principal public value lies in grid reliability, system capacity, voltage transformation, and the integration of electricity supplied by generators and other transmission networks. Its activities are closely connected to Tamil Nadu's broader electricity-sector administration and to the state's infrastructure planning. Publicly available reference material provides limited detail on its leadership, financial performance, individual projects, and consumer-facing programs; those details are therefore not asserted here.

Tamil Nadu Transmission Corporation Limited was created in November 2010 during the restructuring of the Tamil Nadu Electricity Board. The reorganization converted the former board's electricity functions into separate corporate structures, with TNEB Limited serving as the holding entity and TANTRANSCO operating as the transmission-focused subsidiary. The corporation's mandate is centered on the transmission of bulk electricity within Tamil Nadu. In practical terms, this involves operating and maintaining high-voltage transmission assets, including substations that transform electricity between different voltage levels and connect portions of the state grid. TANTRANSCO's network sits between generation and distribution: it carries electricity over the transmission system before it reaches the lower-voltage networks used by distribution utilities and ultimately consumers. TANTRANSCO maintains the substations in Tamil Nadu that are outside the operating responsibility of Power Grid Corporation of India Limited. The substation categories identified for its network include 400/230 kV, 230/110 kV, 110 kV, and 33 kV facilities. The distinction between transmission and distribution is important in interpreting these categories. Systems at 22 kV and 11 kV are generally used for distribution, while the previously used 66/11 kV configuration is no longer part of the current arrangement described in the reference material. The available public reference information establishes TANTRANSCO's ownership, corporate origins, and infrastructure remit but does not provide a detailed account of its individual construction projects, financial results, senior executives, procurement decisions, or major public controversies. Accordingly, this entry focuses on the organization's institutional role and known asset categories rather than adding unsupported operational or financial claims.

• 2010

  TANTRANSCO established

  [1]Tamil Nadu Transmission Corporationen.wikipedia.org

  Tamil Nadu Transmission Corporation was established in November 2010 as part of the restructuring of the Tamil Nadu Electricity Board. It became a subsidiary of TNEB Limited and assumed the state's transmission-system role.

A state-owned electricity transmission operator responsible for high-voltage grid infrastructure and substations across Tamil Nadu, excluding substations operated by Power Grid Corporation of India Limited.

• High-voltage transmission infrastructure

  400/230 kV substations

  The highest-voltage substation category identified in TANTRANSCO's network description. These facilities support bulk-power transmission and voltage transformation between the 400 kV and 230 kV levels.

• Transmission substations

  230/110 kV substations

  Substations that transform electricity between 230 kV and 110 kV levels. They form part of the high-voltage network used to move electricity from major transmission corridors toward lower-voltage parts of the state grid.

• Transmission substations

  110 kV substations

  Facilities operating at the 110 kV level and maintained within TANTRANSCO's transmission infrastructure. They support regional power transfer and the interface between higher-voltage transmission assets and downstream networks.

• Transmission and sub-transmission infrastructure

  33 kV substations

  Substations associated with the lower-voltage end of the network categories attributed to TANTRANSCO. They provide voltage transformation and grid connectivity at 33 kV, while 22 kV and 11 kV systems are generally treated as distribution infrastructure.

1. 1Tamil Nadu Transmission Corporationen.wikipedia.org
2. 2Tamil Nadu Transmission Corporation official websitetantransco.org