A new turbine with a capacity of 2.3MW will be installed at the Port of Newport.
The Associated British Ports (ABP) has announced it is investing £3 million in the project.
It is expected to be operating by autumn this year and is the second turbine to be installed in the port. The first was operational in 2014, generating 1.46 million units of electricity within the first six months of use, according to ABP.
The second turbine will help it to further reduce carbon emissions through the production of green energy.
Ralph Windeatt, Head of Commercial at ABP South Wales said: “The development of a second wind turbine at the Port of Newport clearly demonstrates this commitment to reducing our carbon footprint and through these investments we are moving towards becoming self-sufficient for our own day-to-day operational electricity needs.”