The Antonio Guiteras thermoelectric plant, Cuba's largest power generator, has encountered its fifth breakdown this October after discovering three simultaneous failures in its boiler. These include a crack in the low-temperature superheater, another in the header at the bottom of the boiler, and a third in the high-temperature reheater.
This assessment followed the plant's disconnection from the National Electric System (SEN) due to low vacuum in the condenser, which necessitated a thorough inspection that revealed the true extent of the damage.
Technical Deputy Director Elmer García Romero highlighted that the high-temperature reheater is the most corroded and complex component, necessitating multiple corrective measures. This part previously exhibited six defects in its pipes at the end of September, requiring around 30 welding joints to restore functionality.
Simultaneous Repairs Underway
Fortunately, these three issues can be addressed simultaneously. "All the breakdowns can be worked on concurrently, which shortens repair time," García Romero explained. Currently, the repairs are estimated to require four days, though this timeline may adjust as the critical path is established, involving electrical, valve, and automatic system work.
Teams from the central Repair base, alongside maintenance brigades from Santa Cruz del Norte, Cienfuegos, and Matanzas, are engaged in 24-hour shifts to address the issues.
Repeated Breakdowns Highlight Maintenance Neglect
This marks the fifth unscheduled shutdown for the Guiteras plant this month. The series of failures began on October 9 with a steam-line leak, followed by an economizer tube leak on October 14, a brief synchronization failure on October 20, and vibrations in the turbine on October 24. These recurring issues across various systems—boiler, economizer, reheater, turbine, and condenser—underscore the structural decline of a facility that hasn't seen comprehensive maintenance since 2010, despite being operational for over 38 years since its inception between 1988 and 1989.
Immediate Impact on the Cuban Population
The consequences for the population are severe and immediate. As of Wednesday, the Electric Union reported an available capacity of just 885 MW against a demand of 2,900 MW, leading to a 2,015 MW generation shortfall and a maximum estimated impact of 2,045 MW. The situation worsened with the outage of the 220 kV Pinar–Mariel line, isolating the entire Pinar del Río province from the national grid since 1:21 PM.
Electric Union officials have indicated that a comprehensive overhaul of the Guiteras plant would require replacing over 500 tubes, performing between 1,000 and 1,200 welding joints, and keeping the unit offline for at least 180 days—a scenario deemed unfeasible as it would leave the country without its largest power generator for six months.
Understanding the Electrical Crisis in Cuba
What caused the latest breakdown at the Antonio Guiteras plant?
The latest breakdown was due to three simultaneous failures in the boiler: cracks in the low-temperature superheater, the header, and the high-temperature reheater.
How is the repair process being managed?
The repairs are being conducted simultaneously to minimize downtime, with teams from various maintenance districts working around the clock.
What is the impact of the plant's breakdowns on Cuba's power supply?
The breakdowns have led to a significant power shortage, with a generation deficit of 2,015 MW and leaving entire provinces like Pinar del Río isolated from the national grid.