IEEE Power & Energy Magazine - March/April 2021 - 17

In the issue's fifth article, Marek
Zima and his coauthors give a comprehensive overview of the Swiss power system,
emphasizing the characteristics that make
it unique in the context of energy security.
Unlike the other systems discussed in
this issue, the transmission network of
Switzerland is strongly meshed and highly
interconnected to the grids of neighboring countries. A variety of real-world
events, spanning generation shortages to
the consequences of the lockdown caused
by the COVID-19 pandemic, illustrates
the need for flexible and adaptive mechanisms that guarantee the security of the
system. The article outlines a new operational paradigm to address energy security.
In the sixth article, Makoto Tanaka
and his coauthors describe transmission bottleneck management in the twofrequency power system of Japan. They
describe, in detail, the fundamentals of
a new methodology (the N−1 intertrip
scheme) being implemented to minimize congestion issues exacerbated by
the integration of weather-dependent

renewable sources. Such a methodology
involves the instantaneous curtailing of
generating units in case of a fault by using an advanced protection system.
In the seventh and final article, Pierluigi Mancarella and Farhad Billimoria illustrate the well-known energy trilemma
of affordability, sustainability, and reliability through the unique perspective of
the Australian system. The long, radial
Australian transmission system with a
high penetration of renewables appears as
an emblematic example of system brittleness, where even futuristic solutions, such
as the world's largest battery energy storage system installed at Hornsdale (South
Australia), are both the solution to and
source of grid security issues. The article
concludes with an in-depth discussion on
why the economic implications of system
fragility are the most compelling challenges (possibly even more than the technical
challenges) that demand a new approach.
The issue closes with an " In My
View " column by Göran Andersson.
Physical and cyberinsecurities are ana-

lyzed using stability concepts known to
power engineers. Such concepts are expanded and adapted to reflect an energyconstrained production mix. Building
on these stability concepts, the analysis
provides several relevant observations to
boost robustness and resilience in current and future electric energy systems.
Our goal in putting together this issue of
IEEE Power & Energy Magazine is to spur
a much-needed conversation on energy
security as the power industry shifts worldwide from a power-limited to an energyconstrained paradigm. Such a conversation
will hopefully involve regulators, operators,
producers, consumers, researchers, and the
academic community. We hope that this
will generate innovative ideas that contribute to ensuring a secure, efficient, and environmentally friendly supply of electrical
energy. We are most grateful to Mike Henderson for suggesting the creation of this
issue and nurturing its initial steps and
to Steve Widergren, Barry Mather, and
Susan O'Bryan for pertinent corrections
and insightful observations.
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IEEE Power & Energy Magazine - March/April 2021

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2021