Cassano d’Adda Power Plant
The thermoelectric plant in Cassano d'Adda stands on the banks of the Muzza Canal on an area of 220,000 m2 at about 2 km from the centre of the town with the same name.
The plant has an installed power available for electrical service of 760 MW, consisting of two gas turbines each 250 MW (Group 5 and Group 6) in combined cycle with a steam turbine (Group 2) of 260 MW.
Since its construction (dating back to 1961 with the 75 MW steam Group 1) the plant has been home to cutting-edge systems and continues its evolution. the first power expansion project was conducted in 1984 (320 MW steam Group 2) along with the architectural restyling designed by renowned architect Mario Bellini.
Since 1992, a series of works have improved total plant emissions; initially with operations on steam generators (gas reburning and electrostatic precipitators) and later with the adoption of combined-cycle technology.
In June 2001 the 155 MW gas turbine in combined cycle with steam turbine 75 MW of Group 1 was commissioned, which replaced the steam generator as required by the environmental improvement and power enhancement program approved by the Italian Ministry of Industry and Economic Development.
The use of natural gas alone for its operation yielded, even then, a reduction of polluting emissions and significant energy savings by reducing the fuel used for the same level of energy produced.
The gas turbine, called Group 5, in combined cycle with the existing steam turbine of Group 2 was commissioned in October 2003. This replaced the 320 MW power of the conventional steam unit, with 380 MW high efficiency total power and low polluting emission generation.
Commissioning of the Group 5 gas turbine finally ended the use of heavy fuel oil in favour of natural gas.
The Group 6 gas turbine, twin of Group 5, in the combined cycle with the same steam turbine (Group 2) has been operational since 2006, adding an extra 380 MW to the previous installed power, bringing total production capacity to 760 MW and total plant power to about 1000 MW.
The installation of a new gas turbine introduced further environmental improvement; in fact, thanks to an agreement with the manufacturer General Electric, the new burners featuring "Dry Low NOx 2.6+" technology extremely low emission of NOx, able to comply the limit of 30 mg/Nm3 of nitrogen oxide emission, were installed for the first time on an 9FA class gas turbine.
After a trial tun, conducted at the Cassano d'Adda power plant, this new combustion system has become an industrial reality and was in 2007 was also installed on Group 5, thus implementing a high efficiency combined cycle of 760 MW with very low NOx emissions.
This is a further significant step towards protecting the environment as well as an outstanding goal of generation efficiency. These two achievements put thermoelectric plant in a position of excellence among European power plants.
As of 01.01.2014, the 230 MW production block, consisting of a 155 MW gas turbine (Group 4) in combined cycle with a 75 MW steam turbine (Group 1), was officially decommissioned. The block will be dismantled after obtaining a permit for disposal from the public regulatory bodies.