Tamil Nadu Unveils Major Power Infrastructure Expansion

Why in the News ?

Tamil Nadu Chief Minister C. Joseph Vijay announced major investments in power infrastructure, including a new supercritical thermal power station in Thoothukudi, a statewide transmission upgrade and improved electricity distribution infrastructure in Chennai.

Power Generation and Transmission Expansion

•     The State government announced the Tamil Nadu Transmission Improvement Scheme with an estimated cost of ₹33,066 crore.
•     The scheme aims to strengthen electricity transmission networks connecting major power consumption centres across Tamil Nadu.
•     It envisages construction of 196 new substations and transmission lines covering nearly 15,000 km.
•     Existing transmission infrastructure will also be strengthened to improve grid reliability and power evacuation capacity.
•     A new supercritical thermal power station will be established in Thoothukudi at an estimated cost of ₹20,800 crore.
•     The project is intended to strengthen Tamil Nadu’s electricity-generation capacity and meet rising power demand.
•     The announcement comes amid concerns over inadequate investment in thermal and hydropower capacity in recent years.

Strengthening Chennai’s Distribution Network

•     The government also announced a ₹1,762-crore project to modernise Chennai’s electricity-distribution infrastructure.
•     The initiative is aimed at improving the reliability and resilience of power supply in the metropolitan region.
•     Chennai has experienced power disruptions during monsoons, while electricity demand rises substantially during summer.
•     Strengthening distribution infrastructure is therefore important for handling peak demand, reducing outages and improving service quality.
•     Together, generation, transmission and distribution investments seek to address Tamil Nadu’s growing electricity requirements.
•     The approach highlights the importance of developing an integrated power-sector infrastructure, covering adequate generation capacity, efficient transmission and reliable last-mile distribution.

 About Supercritical Thermal Power Technology:

•     Supercritical thermal power plants operate at temperatures and pressures above the critical point of water, enabling more efficient electricity generation.
•     Unlike conventional subcritical plants, supercritical technology generally requires less coal per unit of electricity generated, improving thermal efficiency.
•     Higher efficiency can help reduce CO₂ emissions per unit of electricity, although coal-based generation remains a significant source of greenhouse-gas emissions.
•     The existing Thoothukudi Thermal Power Station has five units of 210 MW each, giving it an installed capacity of 1,050 MW.
•     Under the proposed restructuring, these units would be replaced through a public-private partnership (PPP) model.
•     Two new units of 800 MW each would raise the station’s total installed capacity to 1,600 MW.