IEEE Power & Energy Magazine - September/October 2021 - 16

Resources, " Badrzadeh et al. discuss the
challenges of operating a power system
with a large penetration of IBRs and a
high share of DERs. The novel approaches
to this new mode of operation are presented
for both systems, with a high concentration
of IBRs in the islanded power
systems as well as the areas of the grid
far from the load and generation centers.
The authors examine the challenges related
to the impact of the reduced commitment
of synchronous generators and
what they mean from inertia and systemstrength
perspectives.
Many jurisdictions around the world,
especially those that have recently undergone
a rapid transformation of their
energy systems, are appreciating the
importance of planning at the power system
level. Planning requires a whole-ofsystem
view, with consideration for all the
aspects of vast, integrated modern grids,
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including long-term security. In the current
decade, renewable generation capacity
is forecast to be driven by government
policies and high-quality wind and solar
resources in Australia. In the following
decade, a strong investment in renewable
energy is forecast to replace the energy
from retiring coal-fired generation. The
scene is setting up for a clean energy system
dominated by renewables.
In the fourth article, Pack et al. discuss
AEMO's Integrated System Plan,
introducing the concept of renewable energy
zones and the robust integration of
these zones into the existing transmission
network. They show how renewable energy
zones can be optimally established
to align investor interest with government
policy and consumer value.
Often, as I listen to global experts debate
the current transformation of power
systems, policy and regulatory tardiness
is highlighted as an issue when dealing
with emerging challenges. Compounded
by climatic changes and their effects
on rapidly changing power systems, the
concept of grid resiliency has been frequently
discussed. In the fifth article,
Eggleston et al. examine this topic,
presenting a novel approach. They note
how extreme events are increasingly affecting
power systems worldwide, calling
for new and effective ways to deal
with these high-impact, low-probability
events. They also observe how lowcarbon
grids are characterized by much
higher operational uncertainty, with a
risk profile that is correspondingly difficult
to assess.
The article is focused on the NEM
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power system, which has experienced
several extreme events, such as the severe
storm that led to the South Australian
" black system " in 2016. The authors note
that although there is a general agreement
in industry and research that new methodologies
and tools are needed to improve
power system resilience to extreme, highimpact,
low-probability-type events, their
practical implementation is still in its infancy.
This includes the need to develop
suitable regulatory frameworks capable of
supporting adequate planning and operational
(including market-driven) mechanisms
and solutions while effectively
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IEEE Power & Energy Magazine - September/October 2021

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