IEEE Power & Energy Magazine - September/October 2017 - 18

We invited a group of authors
worldwide to give us an
overview of storage from
different perspectives.

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capacity adequacy, and ancillary services at low operational and opportunity costs. However, the situation is now starting to evolve due to factors ranging
from changing patterns of hydro inflows to the increasing participation of renewable generation technologies with significant short-term variability, such
as wind and solar power.
This results in opportunities for the development
of other energy storage technologies, which can capture the value of temporal energy arbitrage and also
add the provision of capacity adequacy, network congestion relief and investment deferral, and enhanced
ancillary services to their value stack. The timing
for the deployment of these other storage technologies is affected not only by their intrinsic competitiveness, which, in turn, depends on the evolution of
technology costs (as in the case of batteries), but also
by the regulatory and commercial frameworks that
currently result in barriers and insufficient economic
incentives for new investments.
The final article, by Mostafa Farrokhabadi,
Bharatkumar V. Solanki, Claudio A. Cañizares,
Kankar Bhattacharya, Sebastian König, Patrik S.
Sauter, Thomas Leibfried, and Sören Hohmann, revises the handling of energy storage in microgrids.
They present that, with decreasing costs of renewable energy sources, these technologies are becoming attractive solutions to bring energy to remote
communities and/or replace expensive fossil-fuelbased generators. However, renewable energy sources such as wind and solar are intermittent sources
of energy difficult to predict and experience large
output fluctuations, thus significantly affecting system voltage and frequency. As a result, microgrids
face the problem of maintaining a stable and optimal operation.
In this context, energy storage systems become
a key enabling element for the operation of microgrids, as they compensate for generation and
demand fluctuations while providing various ancillary services, particularly frequency control. The
article focuses on technologies of renewable energy
sources and energy storage systems, followed by
several practical applications in isolated microgrids,
where these systems are most needed.
The "In My View" column, by J. Chris Shelton,
vice president and chief technology officer, AES


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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - September/October 2017

IEEE Power & Energy Magazine - September/October 2017 - Cover1
IEEE Power & Energy Magazine - September/October 2017 - Cover2
IEEE Power & Energy Magazine - September/October 2017 - 1
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IEEE Power & Energy Magazine - September/October 2017 - 18
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IEEE Power & Energy Magazine - September/October 2017 - 50
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IEEE Power & Energy Magazine - September/October 2017 - 55
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IEEE Power & Energy Magazine - September/October 2017 - 78
IEEE Power & Energy Magazine - September/October 2017 - 79
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IEEE Power & Energy Magazine - September/October 2017 - 81
IEEE Power & Energy Magazine - September/October 2017 - 82
IEEE Power & Energy Magazine - September/October 2017 - 83
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IEEE Power & Energy Magazine - September/October 2017 - 85
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IEEE Power & Energy Magazine - September/October 2017 - 89
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IEEE Power & Energy Magazine - September/October 2017 - 91
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IEEE Power & Energy Magazine - September/October 2017 - Cover3
IEEE Power & Energy Magazine - September/October 2017 - Cover4
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