ICE regulation reservoirs with optimal levels to close the year

Friday, August 24, 2018

This press release from Costa Rica's Institute of Electricity was published using an automatic translation system.

The five regulatory reservoirs available to the Costa Rican Electricity Institute (ICE) present optimal levels in the fourth week of August. These bodies of water sustain seven hydroelectric plants, which provide the firm production of the National Electric System (SEN).

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Both Arenal, Angostura, Cachí and Pirrís show levels above the programmed by the Institute for the date. In the case of Reventazón, its height remains controlled below the projected due to the final phase of the intervention in the area of ​​the exceedance landfill.

The Arenal Reservoir - located between the provinces of Alajuela and Guanacaste, and which cascades the Arenal, Dengo and Sandillal plants - is more than four meters above schedule ( See box # 1 ). This artificial lake is essential within the SEN, since the three hydroelectric plants to which it provides water generate, on average, between 20% and 25% of national consumption.

"Having the reservoirs at favorable levels at this time of year allows us to project that renewable generation will remain in the constant of the last three years, that is, over 98%," said Javier Orozco, director of Planning and Electrical Development of the ICE.

With this panorama, the ICE foresees that the use of thermal support for the last quarter of the year will be minimal. As of August 22, the country's renewable generation reaches 97.80% ( See box # 2 ).

Levels of regulation reservoirs *

Real Programmed Reservoir

• Arenal 539.04 543.38

• Angostura 573,50 576.38

• Cachí 988,04 989,41

Pirris 1,186, 07 1,202.59

• Reventazón 258.98 250,71

* In meters above sea level, to August 22.

Renewable generation during 2018 *

Source Percentage

• Water 69.79%

• Geothermal 9.69%

• Wind 17.33%

• Biomass 0.90%

• Sun 0.09%

Total: 97.80%

• Thermal backup 2.2%

* As of August 22.