IEEE Electrification Magazine - March 2014 - 90

critical loads can be supplied by the Pvs. the MaGic system interferes only when the consumption increases significantly. for example, on 2 august, a cloud reduced the
Pv production, as shown in figure 8. if this event happened during the islanded mode, the MaGic system
would limit the consumption of the controllable devices.
the general conclusion is that effective monitoring
(knowledge) and device control improves quality of service to the consumers.

Key Findings and Lessons
Learned from the Trial in Meltemi

Figure 6. The MAGIC load controller. (Photo courtesy of NTUA.)

the islanding/black start support scenario also has
two main steps: the first step takes place before the event
that may occur, and the second step is the steady islanded operation. during the first step, the system monitors
both the available dG units and the loads, and forecasts
the consumption and the available power and energy in
the next hours. a load-shedding schedule is derived
based on the criticality of the loads expressed by the customers' willingness to pay for their service during the
island mode period.
in the first few minutes after the event, the dso (simulated agent) allows operation of critical loads depending
also on the local power availability. When balance and stability have been ensured, MaGic assumes on its own the
energy management, i.e., generation and consumption,
within the islanded network. the transition to the island
mode is done automatically without interference from the
end users or the aggregator.
it should be noted that if the disturbance happens during the middle of the day, there is sufficient energy and

the primary lesson learned from the Meltemi trial is the
importance of enhanced soa capabilities. large-scale
implementation requires cooperation with enterprise
information systems and, consequently, an adaptation of
the negotiation algorithms. another important issue is the
importance of the legal framework and the level of market
deregulation. all of the scenarios implemented in the field
trial assume the implementation of flexible tariffs and the
ability of the aggregator/energy service company (esco) to
make arrangements with the consumers/ dG owners.
finally, the facilities provided by the intelligent load
controller are crucial. the availability of an indoor display
is significant since it allows the inhabitants to actively
participate in shaping their energy profiles. communication with the users has revealed that information about
level of consumption and costs increases their awareness
regarding energy savings and, as a consequence, solutions
like the one proposed by sh/sG project are easier acceptable. the existence of a Web portal is also significant,
although it was not widely used in the Meltemi trial
because of the limited access to internet by the residents
of the holiday campground.

Mass Scalability: Trial in Hoogkerk
the field trial in hoogkerk aims to demonstrate the massscale perspective of automated aggregated control of enduser systems for energy efficiency, combined with testing
the information exchange with enterprise systems using
data traffic at mass-application strengths. the scale of
mass-application is set at 1 million households.

Action

Action

Detection That
an Incident
Happened

Overload

(a)
Figure 7. The operation of the (a) simple versus (b) advanced algorithm.

90

I E E E E l e c t r i f i c ati o n M agaz ine / MARCH 2014

Detection That
an Incident Is
Ready to Happen

Overload
Load
Increase

(b)



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