In Puerto Rico, Genera PR took the 410-megawatt unit 5 of the Costa Sur power plant out of service for an urgent repair, which could leave the electrical generation reserve between 100 and 400 megawatts. The company said a preventive oil sampling of the main power transformer detected signs of hot spots that required immediate attention.
According to Genera PR, identifying the condition in time allows for correction before it leads to an unexpected unit outage or greater equipment damage. During the repair, the company projects the electrical system will operate under a narrow reserve category, with an available capacity of between 100 and 400 megawatts above demand. This classification allows for coverage of all projected electricity consumption but implies a higher risk that the system will not have a sufficient margin if another unit suffers an unexpected failure.
Genera PR noted that these projections may vary depending on demand and operational conditions, so reserve availability will be reviewed daily. The company detailed its classification scale: a moderate reserve is equivalent to a margin of between 400 and 600 megawatts, while it is considered sufficient when it exceeds 600 megawatts. Genera PR stated it will maintain vigilance over system conditions and notify any changes in its operations.
The company did not offer an estimate of how long unit 5 of Costa Sur will remain out of service.