IEEE Power & Energy Magazine - Grid Edge 2023 - 6

In This Issue (Continued)
provide services to the electric grid. Finally, they summarize
the key lessons learned from MEA.
The fifth article, by Julia Matevosyan, Babak Badrzadeh,
Thibault Prevost, Eckard Quitmann, Deepak Ramasubramanian,
Helge Urdal, Sebastian Achilles, Jason MacDowell, Shun Hsien
Huang, Vijay Vital, Jon O'Sullivan, and Ryan Quint, attempts to
describe the grid-forming (GFM) functionality needed for secure
grid operation with a high penetration of inverter-based
power sources (IBPSs), such as wind, solar PV, and battery storage,
without being overly prescriptive as to how to achieve it.
The authors mention that it is not enough to resolve the
operational issues to achieve a high penetration of IBPSs.
Broader system resiliency must be considered, including resource
adequacy and reserve availability and managing uncertainty
due to weather-dependent generation. The authors
focus on system security from a system operator's perspective,
in particular, and stability, while operating at a high penetration
of IBPSs. It also discusses GFM IBPSs as one possible
solution, including the manufacturers' perspective along with
a summary of ongoing research.
The sixth article, by Benjamin Kroposki, Andrey Bernstein,
Jennifer King, Deepthi Vaidhynathan, Xinyang Zhou, Chin-Yao
Chang, and Emiliano Dall'Anese, proposes the concept of autonomous
energy grids (AEGs) to handle the highly distributed
energy future. AEGs are multilayer or hierarchical, cellular-structured
electric grid and control systems that enable
resilient, reliable, and economic optimization.
The authors introduce the robust, scalable, and predictive
hierarchical and distributed control algorithms developed by
the National Renewable Energy Laboratory (NREL) with provSpecial
Thanks
We thank all the authors for contributing
to this issue of IEEE Power &
Energy Magazine. We would also like
to express our sincere gratitude to Innocent
Kamwa, editor-in-chief, for his
guidance in preparing the issue.
For Further Reading
T. Stetz, J. von Appen, F. Niedermeyer,
G. Scheibner, R. Sikora and M. Braun,
" Twilight of the Grids: The Impact of
Distributed Solar on German's Energy
Transition, " in IEEE Power and Energy
Magazine, vol. 13, no. 2, pp. 5061,
March-April 2015, doi: 10.1109/
MPE.2014.2379971.
K. Kok and S. Widergren, " A Society
of Devices: Integrating Intelligent Dis6
ieee
power & energy magazine
tributed Resources with Transactive Energy, "
in IEEE Power and Energy Magazine,
vol. 14, no. 3, pp. 34-45, May-June
2016, doi: 10.1109/MPE.2016.2524962.
X. Hu, C. Zou, C. Zhang and Y. Li,
" Technological Developments in Batteries:
A Survey of Principal Roles, Types,
and Management Needs, " in IEEE Power
and Energy Magazine, vol. 15, no. 5,
pp. 20-31, Sept.-Oct. 2017, doi: 10.1109/
MPE.2017.2708812.
J. Quiros-Tortos, L. Ochoa, and T.
Butler, " How Electric Vehicles and the
Grid Work Together: Lessons Learned
from One of the Largest Electric Vehicle
Trials in the World, " in IEEE
Power and Energy Magazine, vol. 16,
no. 6, pp. 64-76, Nov.-Dec. 2018, doi:
10.1109/MPE.2018.2863060.
able convergence, which are needed to optimize the grid in
real-time and to enable the proliferation of distributed energy
resources (DERs) on a massive scale. To evaluate if the
software algorithms would work when integrating many real
controllable devices, the authors set up a large experiment
at NREL's Energy Systems Integration Facility. Moreover, the
authors have now started to move out of the laboratory to
demonstrate the deployment of AEGs in the real world.
The last article, by Shadi Chuangpishit, Farid Katiraei,
Babu Chalamala, and Damir Novosel, addresses the deployment
and utilization of advanced mobile energy storage
system (MESS) to enhance reliability and resilience of
energy supply and presents several use cases for outage
recovery and emergency response.
The authors present a high-level comparison between
a portable diesel generator versus a MESS from technical
and environmental perspectives, as well as MESS versus
stationary ESS. The authors point out that use cases of
MESS and its operational strategies are highly dependent
on geography, jurisdiction, and distribution system
characteristics. It is an important step for utilities to
evaluate MESS technology based on their own requirements
and identify the merits of the technology together
with its financial justification. Meanwhile, a great effort
towards standardization of technology and its integration
into customer facilities and utility fleets is required
to ensure a smooth transition to a more promising energy
supply for emergency response in the future.
-Yanli Liu
J. Matevosyan et al., " Grid-Forming
Inverters: Are They the Key for High
Renewable Penet rat ion? " in IEEE
Power and Energy Magazine, vol. 17,
no. 6, pp. 89-98, Nov.-Dec. 2019, doi:
10.1109/MPE.2019.2933072.
B. Kroposki, et al., " Autonomous Energy
Grids: Controlling the Future Grid with
Large Amounts of Distributed Energy Resources, "
in IEEE Power and Energy Magazine,
vol. 18, no. 6, pp. 37-46, Nov.-Dec.
2020, doi: 10.1109/MPE.2020.3014540.
S. Chuangpishit, F. Katiraei, B. Chalamala,
and D. Novosel, " Mobile Energy
Storage Systems: A Grid-Edge Technology
to Enhance Reliability and Resilience, "
in IEEE Power and Energy Magazine,
2023 Grid Edge Technologies Conference
& Exposition Special Issue.
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