IEEE Power & Energy Magazine - November/December 2020 - 17

functionality/settings via the postevent
analysis of bulk system disturbances.
The very high levels of DER integration in Australia's major interconnections can serve as an example of what
is possible in other systems worldwide.
The second article, led by Benjamin
Kroposki at the National Renewable Energy Laboratory, is "Autonomous Energy
Grids: Controlling the Future Grid With

addressed as Australia integrates very
high levels of distributed PV systems.
Notably, Australia leads the world in
distributed PV penetration for small,
mostly residential, rooftop systems.
Such systems provide little visibility
to system operators, creating considerable challenges. This article also covers pioneering work on the validation
of distributed PV system ride-through

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CURRENT IN AMPERES X 100 AT 480 VOLTS
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152

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300

100

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60
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5 6 7 8 9 10000
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600
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400

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increasingly important roles. As DERs
become prolific, they will need to provide more grid services/functionalities,
which have typically been supplied via
other means. Likewise, as DERs are deployed in greater numbers, the planning
and operation of such systems becomes
more critical for the proper operation of
the interconnected power system. The
findings and perspectives of the articles
in this issue provide a snapshot of ongoing research and efforts to ensure the
continued ability to integrate increasingly higher levels of capable DERs into
the world's electric power systems.
The evolution of DERs, dominated
by distribution-connected PV systems,
has been chronicled over the years.
Although many challenges remain,
it is interesting to observe how the
most critical concerns of industry and
the highest focus by researchers have
morphed as most utilities gained experience with DER integration firsthand.
Without a doubt, issues such as voltage
regulation on the distribution circuit are
critical requirements for interconnected DERs, but other issues have also become critical as DERs have increased
to be a sizeable generation source and
are impactful to system operations. Recently, several studies were completed
that focused on the impact of DERs
on the transmission system, both during normal operation (e.g., the role of
PV forecasting in generation scheduling) and during contingencies (e.g., the
possibility of wide-scale inverter-based
DER tripping during regional voltage
and frequency events). As you peruse
the articles in this issue, we hope that
you marvel at the comprehensiveness
of the integration of DERs and their
respective studies but also identify new
areas of R&D to continue the integration of DERs at higher levels.
The first article, "Consumer-Led
Transition: Australia's World-Leading
Distributed Energy Resource Integration Efforts," was prepared by a team
of authors from across many power
system domains. Naomi Stringer, from
the University of New South Wales,
and her coauthors present a comprehensive view of the challenges being

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IEEE Power & Energy Magazine - November/December 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - November/December 2020
