ABB Integrated control for ‘ultra-supercritical’ power plant
12 April 2010
Integrated control for ‘ultra-supercritical’ power plant. ABB says it has won an order from National Thermal Power Corporation (NTPC), India’s largest power company, to supply an integrated control and instrumentation system for a coal-fired 2x660 megawatt (MW) super thermal power plant in the state of Bihar in northern India.
NTPC is progressively adopting supercritical and ultra-supercritical technology to raise the cycle efficiency of its power plants. This will be achieved at Barh 2 by adopting a steam pressure of 247 kg/cm2, a higher hot reheat temperature of 593°C and a super heater temperature of 565°C. Barh 2 is an extension to the 1,980 MW Barh 1 super thermal power plant which is also under construction.
NTPC estimates that by adopting supercritical technology with a unit configuration of 6x660 MW or 5x800 MW, coal consumption can be reduced by up to 30 million tons over a period of 25 years compared to a typical 4,000 MW subcritical plant with a unit configuration of 8x500 MW. The resultant reduction in CO2 emissions is estimated to be about 33 million tons.
ABB will supply a distributed control system based on System 800xA for the main power plant and auxiliary systems, field instrumentation including process analysers and emission monitoring systems, a plant information management system, and large video screen systems for the central control room. ABB is also responsible for design, engineering, installation and commissioning.
Barh is part of an NTPC initiative to enhance power supply at a rapid pace and help meet India’s growing electricity requirements. When completed the site will have a generating capacity of 3,300 MW and will be one of the largest power plants in NTPC’s fleet of 26 generating facilities.
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