Temporary power provider Aggreko has signed a two-year contract with Energia Argentina and extended another deal in Africa.Aggreko will deliver an extra 150MW of diesel-fuelled power in Argentina. The group has additionally agreed to extend its existing 300MW of capacity with the same customer about two more years.The company has also signed a three-year extension for 200MW of gas-fuelled plant in Cote d'Ivoire, with the option for the customer to extend two years.Chief executive Chris Weston said: "It is pleasing to build on existing relationships and to have been selected to assist our customers in Argentina and Cote d'Ivoire with their on-going power needs. The extension of 500MW of existing contracts, for multiple years and new work in Argentina gives us positive momentum as we begin 2015."