27.02.2014 power-technology
Kudgi is a 4,000MW supercritical thermal power plant that is being developed by NTPC, at Kudgi village in Bijapur District of Karnataka. It is NTPC’s first 800MW supercritical project and is being developed in two stages. The first stage will have a capacity of 2,400MW (3 x 800MW) and the second stage will have a capacity of 1,600MW (2 x 800MW).
Electricity generated from the regional power plant will be supplied to the South Indian states of Karnataka, Andhra Pradesh, Tamil Nadu and Kerala.
«Construction works for the first stage of the plant commenced in 2012 and commissioning is expected in 2015-2016.»
The total investment required for the project was estimated to be INR 132.05bn (approximately $2.91bn) as of January 2012. Japan Bank for International Cooperation (JBIC) provided a $350m term loan for the first stage of the project in January 2014.
Kudgi super thermal power plant details and make-up
NTPC, Power Company of Karnataka Limited (PCKL), and Energy Department of Karnataka signed a memorandum of understanding in January 2009 to construct the super thermal power plant at Kudgi.
The project is being constructed in an area of approximately 4,100 acres, which comprises mostly barren and rocky land and is partly agricultural with single or commercial crops. The project received the forest clearance in September 2010.
The first stage of the plant will feature three supercritical once-through coal fired boilers and three 800MW steam turbines. Two of the three boilers, to be supplied by Doosan, will produce 2,550t of high-pressure steam per hour, with pressure levels and temperature reaching 271kg/cm2 and 569°C respectively.
The project is estimated to require 7,380m3 of water per hour, which will be supplied through a pipeline from Almatti Dam on Krishna River, situated at a distance of 18km from the project site. The water will be stored in a reservoir within the project site.
Approximately 8,000tpd of fly ash and 2,000tpd of bottom ash is expected to be generated at the plant. High-concentration slurry disposal (HCSD) system will be employed to dispose the ash.
Fuel supply to the Kudgi power plant
Domestic coal will be used initially for generating power at the Kudgi supercritical power plant, while blended coal is expected to be used in future.
The project is estimated to have a coal requirement of 12million tonnes per year, which will be provided from NTPC’s Pakri Barwadih Coal Block in Jharkhand.
Supply and transfer of power generated at the Kudgi STPP
Power required during the construction of the project will be sourced from KPTCL’s Basavana Bagevadi Substation, situated approximately 20km from the site.
«Kudgi Transmission, a special purpose vehicle (SPV), was established to construct the power transmission infrastructure.»
The power generated by the plant will be transferred to Narendra Substation via two 400kV D/C transmission lines, further to Madhugiri pooling station via a 765kV D/C transmission line, and finally to Bidadi sub-station via a 400kV D/C transmission line.
Contractors involved with NTPC’s supercritical thermal power project
A contract, worth $470m for supplying three 800MW supercritical steam turbines and generators for stage-I of Kudgi Super Thermal Power Project was awarded to Toshiba JSW in February 2012.
Doosan Chennai Works, a subsidiary of Doosan Heavy Industries and Construction, was awarded the contract for supplying two supercritical coal-fired boilers. The work was subcontracted to Doosan Heavy Industries Vietnam in October 2012.
Sunil Hitech was awarded a contract worth $15m by Doosan Chennai Works, in September 2012, for conducting the erection, testing and commissioning works of one of the boilers.
Edac Engineering is engaged by Doosan for the erection of the boiler unit-2 and auxiliaries for stage- I of the thermal power project.
IDPL was awarded a contract, by Kudgi Transmission, for the detailed engineering, survey, civil works, installation, testing and commissioning of the four interconnected power transmission lines to evacuate power from the Kudgi STPP.
Petron Engineering Construction is the supplier of the electrical equipment for the Kudgi STPP. The scope of the contract also includes installation, testing and commissioning of the electrical equipments.
In February 2014, NTPC awarded a contract worth INR 2.48bn (approximately $39m) for the construction of the township at the Kudgi project site to Unity Infraprojects.
The steam generator (SG) area and other offsite civil works package was assigned to IVRCL.
NTPC engaged Mantec Consultants to conduct the environmental impact assessment study for the Kudgi power plant.
Torishima Pump was engaged by Doosan Power Systems for providing three boiler circulation pump units with a capacity of 1,111m3 per hour for the first stage.