IEEE Power & Energy Magazine - September/October 2017 - 68

Facilitating
the Integration
of Renewables
in Latin America
The Role of Hydropower Generation
and Other Energy Storage Technologies
By Rodrigo Moreno, Rafael Ferreira,
Luiz Barroso, Hugh Rudnick,
and Eduardo Pereira

I

IT IS WELL KNOWN THAT STORAGE FACILITIES CAN
provide value to various electricity sectors through several
services, which we group into five main classes:
1) temporal energy arbitrage (the ability to shift megawatt-hours in time to increase energy market revenues)
2) capacity adequacy (the ability to economically and reliably meet system capacity requirements)
3) ancillary services, notably those related to system balancing (in various time scales), reserves, and frequency control (although voltage and reactive power control
are also included)
Digital Object Identifier 10.1109/MPE.2017.2708862
Date of publication: 17 August 2017

68

ieee power & energy magazine

4) network congestion relief and network investment deferral (including network security and thermal losses)
5) option value (the ability to provide a hedge against the
uncertain future).
This categorization is useful for the purposes of this article,
although the boundaries among the different classes of services often depend more on the regulatory and commercial
frameworks of each jurisdiction than on absolute technical
features. For instance, whether a facility is providing secondary frequency control by participating in automatic generation
control or simply shifting power among different dispatch periods depends on the temporal resolution defined.
Furthermore, this categorization is based on the value
delivered to the electricity system as a whole, regardless of

1540-7977/17©2017IEEE

september/october 2017



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IEEE Power & Energy Magazine - September/October 2017 - Cover3
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