Loma de la Lata Thermal Power Plant (‘CTLL’)

In the Province of Neuquén, CTLL is located at Loma de la Lata, near what used to be one of the largest gas fields in Latin America, known by the same name. Commissioned in 1994, it has a 780 MW capacity, 1.8% of Argentina’s installed capacity, and consists of one CCGT with three GE GT of 375 MW and a 180 MW Siemens ST, two 105 MW GE GT, and 15 MW from MAN gas engines. From 1997 to 2025, the average annual generation was 2,539 GWh, with a record high of 5,103 GWh in 2022 and a record low of 272 GWh in 2002.

After suffering a failure in 2023, GE GT05 was reinstated at the end of January 2024, failing again in August 2024. Therefore, it operated with a used power turbine until December 2024, when the repaired turbine was installed. In 2025, a major overhaul was carried out on the CCGT’s GT01. The work included upgrading the generator and transformer protection systems and replacing the excitation system. A major inspection was carried out, including the replacement of the turbine rotor to extend its useful life. Maintenance comprised electrical measurements and preventive work on the Instrumentation and Control (I&C) systems. In addition, casing alignment and replacement of the transformer bushings were carried out, ensuring the unit’s operational reliability and efficiency.