IEEE Power & Energy Magazine - July/August 2014 - 66

PES Area
PCC
Local
Control
PCC
Connection
Point

DG Unit

Connection
Point
DG
Controller

Connection
Point

DG Unit

DG
Controller

Demand
Control

Load
Control

Load

Microgrid Coordinator
Historical Server

Application Server

Master Server

Operator HMI

Communication
System

LAN

Local System

figure 7. Communications architecture of a microgrid.

(Tucson, Arizona, exhibits a value of 2,080). Its skies are
also exceptionally clear, with an annual average clearness
index that is close to the world's maximum. Recent reductions in solar technology prices have made solar projects
increasingly economical.

Microgrid Description
Huatacondo has an electricity network that is isolated from
the interconnected system and originally supplied electricity
for only ten hours a day, using a diesel generator. The project consists of a microgrid that takes advantage of the area's
particularly abundant renewable resources to provide 24-hour
electricity. Since the village has also experienced problems
with its water supply system, the project design included a
component to manage that resource. Furthermore, to compensate for generation fluctuations due to the use of renewable
energy sources, a demand-side component was included in the
system. Figure 8 provides an outline of the system, including
photovoltaic panels, a wind turbine, a diesel generator, a battery bank, a water supply system, and a demand-side management mechanism.
The EMS of the proposed microgrid has the following
objectives:
✔ to minimize use of diesel
66

ieee power & energy magazine

✔ to calculate set points for active and reactive power

generation from the generation sources, including the
battery bank
✔ to determine the operation of the electric water pump
to keep the level of water in the water tank within predefined limits
✔ to send signals to consumers to promote behavioral
changes.

Development of the Huatacondo Microgrid
Stage 0

The project was developed at the electrical engineering department of the Universidad de Chile, where the original designers
had no expertise or experience in social development. A natural
resources engineering student, a geography student, and a master's student in sustainability, guided by experienced professors,
were then included in the "social area" of the project's design
in a bid to develop engagement with the community and the
environment. Due to the multiplicity of disciplines, one of the
biggest challenges the team faced was to create a mechanism
for sharing different approaches and points of view as well as
a mechanism for decision making in the context of multiple
objectives and for dealing with trade-offs.
july/august 2014



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - July/August 2014

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