IEEE Power & Energy Magazine - March/April 2017 - 18

and the role of distribution system modeling in the development of such plans
are also discussed in the article.
the fourth article, "Geo-information is Power" describes an effort and
the resulting tools of using geographical
information system (GiS) derived data
to develop electrical system models that
are then used to calculate the potential
distribution-system-level impacts resulting from the integration of multiple
residential PV systems. Many practical
challenges of using GiS information
to build electrical system models are
presented followed by an excellent discussion of the tool-chain developed to
complete the PV impact studies.
"a Success Story," the fifth article
in this issue, gives a narrative of how
a state-level technical working group
successfully developed harmonized
DeR interconnection requirements to
enable their safe, reliable, and cost-

efficient deployment to meet state
policy goals for renewable energy. the
working group consisted of a balanced
mix of stakeholders including utilities,
PV developers, and government agencies. a summary of the resulting DeR
interconnection requirement changes
made by the group is presented and
can serve as a potential guide for other
groups working on similar DeR interconnection guidelines.
the final article, "achieving a
100% Renewable Grid," describes the
impacts and challenges when considering the operation of an electrical power
system with 100% renewable energy.
as PV DeRs account for the majority of solar-based renewable energy,
the implication of the operating characteristics of such systems is important to consider on an overall system
level. this article provides a comprehensive overview of the challenges

to be addressed, such as power system
stability, power system protection, unintentional islanding, and black start
when operating a grid dominated by inverter-interfaced renewable generators.
Potential solutions for renewable generators providing functionality needed
in 100%-renewable grids are presented,
including grid forming, droop, and virtual inertia capability.
the issue concludes with colton
ching providing a perspective of the
challenges being faced in hawai'i in
his "in My View" contribution. the
amount of PV DeRs installed in the state
has grown rapidly in the past few years,
and, the relatively small size of the island systems results in current operating challenges that may be prescient
for other system operators seeing ever
increasing amounts of DeRs interconnected within their systems.
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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2017
