Here is an explanation of the term in Spanish:

"Centrales de punta

Exclusivamente proyectadas para cubrir las demandas de energía eléctrica en las horas – punta; en dichas horas – punta, se ponen en marcha y trabajan en paralelo con la central principal. Si la central de base es de pequeña potencia, se utilizan grupos electrógenos de los que maquina motriz es un motor de explosión; si la central de base es mayor, se utilizan generalmente pequeñas centrales con motor Diesel. "
https://www.textoscientificos.com/energia/centrales-electric...

It sounds like this:

"Peaking power plants, also known as peaker plants, and occasionally just "peakers," are power plants that generally run only when there is a high demand, known as peak demand, for electricity.[1][2] Because they supply power only occasionally, the power supplied commands a much higher price per kilowatt hour than base load power. Peak load power plants are dispatched in combination with base load power plants, which supply a dependable and consistent amount of electricity, meeting the minimum demand."
https://en.wikipedia.org/wiki/Peaking_power_plant

"Peak Load Power plants
To cater the demand peaks, peak load power plants are used. They are started up whenever there is a spike in demand and stopped when the demand recedes."
http://sinovoltaics.com/learning-center/basics/base-load-pea...