Ennore SEZ Super Critical Thermal Power Project (Vayalur)

From Global Energy Monitor

Ennore SEZ Super Critical Thermal Power Project (Vayalur) is a 1,320 megawatt (MW) coal-fired power station in Tamil Nadu, India, which has been proposed by the Tamil Nadu Generation and Distribution Corporation (TANGEDCO).

The power station is not to be confused with the Ennore Thermal Power Station.


The undated satellite below shows the power station in Vayalur village of Thiruvallur district, near the North Chennai power station also owned and operated by TANGEDCO.

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TANGEDCO has proposed to build two supercritical 800MW units on a reclaimed ash disposal area of the North Chennai Thermal Power Station. The plant is proposed to be built on 500 acres of land owned by the Tamil Nadu Electricity Board near the village of Vayalur, Tiruvallur district, Tamil Nadu, India.[1][2]

The project received environmental clearance for a 2 x 800 MW coal plant in 2014.[3] The capacity of each unit was, however, reduced to 660MW while calling engineering, construction, and procurement (EPC) tenders for the project in the same year.[4]

According to the India government (March 2016), the project was under construction with a planned commissioning of 2018-2019. The EPC contract was awarded to Bharat Heavy Electricals (BHEL).[5]

In December 2016 the India government reported that work at the site was held up from October 2015 onwards due to a court case filed against TANGEDCO by one of the EPC bidders. On October 18, 2016, the court ruled in favor of TANGEDCO and work on the site reportedly resumed on November 2, 2016.[6]

Planet satellite photos show construction did not substantially begin until June 2018, and then advanced through October 2018.

In 2019, TANGEDCO got a two year extension from the government to finish construction of two slow-moving thermal power plants at Ennore with a combined capacity of 1,980 MW. [7] In 2020, a second extension was granted for the project until 2024.[8]

According to the government's Broad Status Report in October 2020, the power station was planned for commissioning in 2022.[9] By November 2021, the date was pushed back to 2023.[10] By May 2022, it was delayed to 2024.[11]

Opposition & permitting developments

A suo moto case (No.162/2021) was registered by the National Green Tribunal against various projects including the Ennore SEZ project based on news published in Times of India dated July 1, 2021.[12][13] The NGT (Southern Zone, Chennai) constituted a committee and instructed it to look into the issues and submit a report. Accordingly, the NGT Committee recommended that "TANGEDCO shall resume the activities pertaining to NCTPS Stage-III and Ennore SEZ power plants within [Coastal Regulation Zone (CRZ)] area in Kosasthalaiyar River/Buckingham Canal/Backwaters only after obtaining amendment to the existing CRZ clearance from MoEF&CC."[14][15]


It was reported in 2019 that the Power Finance Corporation is funding the project, at an estimated total investment of Rs98bn (£1.07bn).[16] As of December 2020, 55% of financing had been secured.[17]

Coal supply

TANGEDCO has stated that coal for the project would be 30% imported coal and 70% domestic through Ennore Port.[1] TANGEDCO states that the project would require 5.46 million tonnes per annum of coal. TANGEDCO proposes that 3.82 million tonnes per annum be sourced from the Kalinga Block, Talcher, Mahanadhi and IB Valley and 1.64 million tonnes per annum from unspecified overseas sources.[18]

The 2014 environmental clearance stated coal for the power station would be imported.[19]

In January 2022, with Ennore SEZ and other coal projects set to take off with a generating capacity of 5,700 MW, Tangedco bid for two coal blocks – Meenakshi coal block in IB Valley and Bankhui coal block in Talcher – to meet the growing needs of the state.[20]

Project Details

Sponsor: Tamil Nadu Generation and Distribution Corporation (TANGEDCO)
Location: Vayalur village, Ponneri taluk, Thiruvallur district, Tamil Nadu
Coordinates: 13.291667, 80.309722 (exact)
Status: Construction
Capacity: 1,320 MW (Units 1&2: 660 MW)
Type: Supercritical
Projected in service: 2024
Coal Type:
Coal Source: Indonesia
Source of financing: Power Finance Corporation (£1.07 billion)[16]
Permits and applications:

Articles and resources


  1. 1.0 1.1 Tamil Nadu Pollution Control Board, "Proceedings of the Public meeting held on February 23, 2011,", Tamil Nadu Pollution Control Board website, June 2011.
  2. "Ennore SEZ STPP (2x660 MW)," TANGEDCO website, accessed Sep 2015
  3. Environmental clearance, India MoEF, Jan 7, 2014.
  4. "Ennore SEZ Supercritical Thermal Power Project - NS Energy". NS Energy. Retrieved 2021-01-05.
  5. "Monthly Report on Broad Status of Thermal Power Projects in the Country," Government of India Ministry of Power, March 2016
  7. "TANGEDCO gets reprieve for two power projects at Ennore," The New Indian Express, April 15, 2019
  8. "Tangedco gets another extension till 2024 to commission Ennore SEZ thermal power plant," The New Indian Express, December 7, 2020
  9. Broad Status of Thermal Power Plants, India Central Electricity Authority, October 2020
  10. “Broad Status Report,” Thermal Project Monitoring Division, Central Electricity Authority, November 2021
  11. “Broad Status Report of Under Construction Thermal Power Projects,” Central Electricity Authority, May 2022
  12. Presumed to be "Chennai: Another pipeline leak at Ennore power plant," Times of India, July 1, 2021
  13. "TANGEDCO violations: NGT takes suo moto cognizance," The New Indian Express, August 4, 2021
  14. "Minutes of the 17th Meeting of the Re-Constituted Expert Appraisal Committee (EAC) on Environmental Impact Assessment (EIA) of Thermal Power Projects Held on 30th November, 2021," Expert Appraisal Committee, November 30, 2021
  15. "Report of Joint Committee," Submitted to NGT (SZ) Chennai, September 2021
  16. 16.0 16.1 Jun 20, B. Sivakumar / TNN /; 2019; Ist, 10:08. "Chennai: Tangedco to add 2,100MW thermal capacity in 2 years | Chennai News - Times of India". The Times of India. Retrieved 2020-09-30.
  17. COVID-19, cyclones delayed Ennore Thermal Plant, Tangedco says, The Hindu, Dec. 9, 2020
  18. Tamil Nadu Electricity Board, "Executive Summary of EIA for proposed Ennore SEZ Thermal Power Project (2X800) MW at Vayalur Village, Ambathur Taluk, Thiruvallur District, Tamil Nadu", Tamil Nadu Electricity Board, December 2010, page E-III.
  19. Environmental clearance, India MoEF, January 7, 2014
  20. "Tangedco bids for 2 Odisha coal blocks," Times of India, January 12, 2022

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