2 BACKGROUND
The many hazards associated with operating the 20
th
century grid in the 21
st
century is of high concern.
Even as demand has skyrocketed, there has been
chronic underinvestment in getting energy where it
needs to go through transmission and distribution,
further limiting grid efficiency and reliability. As a
result, system constraints worsen at a time when
outages and power quality issues are estimated to
cost more than hundreds of million dollars each year
(Wijayatunga, 2004). In short, the grid is struggling
to keep up.
Based on 20
th
century design requirements and
having matured in an era when expanding the grid
has the only option and visibility within the system,
the grid has historically had a single mission, i.e.,
keeping the lights on. It was not simply a primary
concern when the existing grid was designed to
consider the energy efficiency, reliability, security,
and environmental issues (Detchon, 2009).
EFFICIENCY: If the grid were just 5% more
efficient, the energy savings would equate to
permanently eliminating the fuel and greenhouse gas
emissions from 53 million cars. Consider this,
replacing just an incandescent bulb with a compact
fluorescent bulb; the country would conserve
enough energy to light millions of homes and save a
fortune annually.
RELIABILITY: There have been few massive
blackouts over the past 40 years. More blackouts and
brownouts are occurring due to the slow response
times of mechanical switches, a lack of automated
analytics, and “poor visibility” – a “lack of
situational awareness” on the part of grid operators.
In many areas the only way a utility company knows
there is an outage is when a customer calls to report
it. This issue of blackouts has far broader
implications than simply waiting for the lights to
come on. Imagine plant production stopped,
perishable food spoiling, traffic lights dark, and
credit card transactions rendered inoperable. Such
are the effects of even a short regional blackout.
SECURITY: The grid’s centralized structure leave it
open to attack. In fact, the interdependencies of
various grid components can bring about a domino
effect – a cascading series of failures that could
bring the nation’s banking, communications, traffic,
and security systems among others to a complete
standstill.
CLIMATE CHANGE: From food safety to personal
health, a compromised environment threatens us all.
To reduce the carbon footprint and stake a claim to
global environmental leadership, clean, renewable
sources of energy like solar, wind and geothermal
must be integrated into the grid. However, without
appropriate enabling technologies linking them to
the grid, their potential will not be fully realized.
Figure 1: Smart grid power system (Gellings, 2011).
This all comes in to the preparation for an
electric system that is cleaner and more efficient,
reliable, resilient and responsive – a smarter grid
(Figure 1).
3 THE SMART GRID
The electric industry is poised to make the
transformation from a centralized, producer-
controlled network to one that is less centralized and
more consumer-interactive. The move to a smarter
grid promises a new business model and relationship
with all stakeholders, involving and affecting
utilities, regulators, energy service providers,
technology and automation vendors and all
consumers of electric power.
A smarter grid makes this transformation
possible by bringing the philosophies, concepts,
technologies and the industry’s best ideas for grid
modernization to achieve their full potential. It may
surprise you to know that many of these ideas are
already in operation.
Smart grids will increase the possibilities of
distributed generation, bringing generation closer to
those it serves (think: solar panels on your roof). The
shorter the distance from generation to consumption,
the more efficient, economical and “green” it may
be. Distributed generation is the use of small-scale
power generation technologies located close to the
load being served, capable of lowering costs,
improving reliability, reducing emissions and
expanding energy options. An automated, widely
distributed energy delivery network will be
characterized by a two-way flow of electricity and
information that will be capable of monitoring
everything from power plants to customer
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