IEEE Electrification Magazine - June 2017 - 3

article focuses on pilot projects in the Greek islands
with large renewable energy resources, and it presents the steps taken for the realization of these
ambitious projects.
The article provides
By the end of 2016,
an overview of the
tens of microgrids will
noninterconnected
island power syshave been put into
operation in China, and tems (NIIPS) and
their specific operthey will range from
ational characterseveral kilowatts to
i s tics in Greece,
including their lowdozens of megawatts.
load factors, seasonal-demand variability, population mix, and high operating costs. The
article also describes the regulatory framework
and outlines the steps for a transition from distribution-system operators to a central administrator
for all NIIPS, to achieve higher service quality using
renewable energy resources, lower operational costs,
and higher exploitation of the technological advancements in Greece.
Next, "Microgrid Development in China: A Method for Renewable Energy and Energy Storage Capacity
Configuration in a Megawatt-Level Isolated Microgrid"
by Hu Xie, Shu Zhen, and Ming Ni, states that by the
end of 2016, tens of microgrids will have been put
into operation in China, and they will range from
several kilowatts to dozens of megawatts. In practice,
microgrid economics and reliability criteria may
have conflicts. Therefore, detailed economic and reliability evaluations are necessary to determine the
proper size of a microgrid in China. The article presents the corresponding methodology and process
that will help optimize the economy of large scale
microgrids and ensure their stable operation in offgrid settings.
In "A Hybrid ac/dc Nanogrid: The Keating Hall
Installation at the Illinois Institute of Technology," by
Mohammad Shahidehpour, Zhiyi Li, Wenlong Gong,
Shay Bahramirad, and Marc Lopata, the authors point
out that the nanogrid includes a practical technology
that is simpler than that of a microgrid with implementation and operations that are more flexible than
that of a microgrid. Meanwhile, the diversity and
modularity of nanogrids makes them ideal for forming the basis for a microgrid. The Keating Nanogrid at
the Illinois Institute of Technology is a successful
demonstration of how a self-controlled nanogrid can
provide benefits to both microgrid operations and
local building loads. Accordingly, nanogrids open a
new door for implementing smart grid technologies
using a bottom-up strategy. With the prevalence

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Table of Contents for the Digital Edition of IEEE Electrification Magazine - June 2017