IEEE Power & Energy Magazine - September/October 2017 - 16

operating capabilities of the electric
grid. The increasing demand for specialized grid services in both countries will
drive the adoption and large-scale deployment of energy storage systems,
gradually making them a mainstream
technology widely considered in plan-

ning, building, and operating electric
power systems.
The authors describe experiences of
grid-level storage applications in both
countries, presenting valuable technical
and institutional lessons for developing storage around the world. Although

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pumped-storage hydropower is currently providing the majority of grid-level
storage capacity in both countries, the article focuses on battery storage development. They discuss the policy, regulatory,
and market barriers to storage deployment in China and the United States and
the respective opportunities.
The next article, by Hong Chen,
Scott Baker, Scott Benner, Aaron
Berner, and Jianwei Liu, shares the experience of PJM as the first of the U.S.
independent system operators/regional
transmission organizations to demonstrate the ability of battery energy
storage resources to provide frequency regulation services in a competitive market. They outline the storage
technologies operating in PJM today:
pumped-storage hydro (in generation),
batteries (both in generation and as a
demand-side resource), thermal energy
storage (as a demand-side resource),
and flywheels (in generation).
The authors also describe the wholesale products these technologies provide to the market as well as services
that energy storage resources may present in the future and the integration opportunities that will result as a larger
amount of storage is being deployed
within the grid. They discuss the FERC
notice of proposed rulemaking (NOPR)
of November 2016 to remove barriers
for energy storage resources to participate in wholesale markets. This NOPR
highlighted some of the key challenges
and opportunities related to the integration of energy storage resources in
organized wholesale electricity markets: the need for new storage models,
longer-term revenue streams, and adequate regulatory aspects for integrating storage.
The sixth article, by Rodrigo Moreno, Rafael Ferreira, Luiz Barroso, Hugh
Rudnick, and Eduardo Pereira, revises
the role of hydropower generation and
other energy storage technologies in facilitating the integration of renewables
in Latin America. The large reservoirs
associated with hydropower plants have
historically been the storage technology in countries like Brazil and Chile,
delivering temporal energy arbitrage,
september/october 2017

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