Articulo en ingles.

1. Page 1
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
NOTE: For up-to-date information about smart grids, please visit our new Smart Grid portal.
Smart Power Grids - Talking about a Revolution
At first glance, "revolution" may seem too strong a word to describe the changes happening in electrical power grid
technologies. But take a closer look and you'll find that the transition from today's grids to "smart"grids more than
qualifies as nothing less than revolutionary.
Amazingly, much of the thinking behind today's power grid is based on design decisions originally published by Nikola
Tesla in 1888 (see war of currents)! While valid for his time, Tesla's assumptions like centralized power generation,
demand-driven control and unidirectional transmission are now considered obsolete.
According to the U.S Government's International Energy Outlook 2008, world energy consumption is projected to
increase by 50 percent from 2005 to 2030. So it should come as no surprise that future power grids must meet several
needs that Tesla never imagined.
Specifically, a "smart" grid must be capable of providing power from multiple and widely distributed sources, e.g., from
wind turbines, concentrating solar power systems, photovoltaic panels and perhaps even plug-in hybrid electric
vehicles . Moreover, since all renewable energy sources invented so far vary greatly with time, a smart grid must be
capable of flexibly storing electric power for later use, e.g., in batteries, flywheels or super-capacitors or again even in
plug-in hybrid electric vehicles. Last but not least, to improve power reliability a smart grid must make use of new and
highly sophisticated adaptive generation and distribution control algorithms.
Partly in response to these needs, in December, 2007, the U.S. Congress passed, and the President signed, the Energy
Independence and Security Act (Pub.L. 110-140) requiring that the:
Department of Energy (DOE) establish a Smart Grid Advisory Committee to provide advice on both smart grid
technologies and on using Federal incentives to encourage transition to these technologies.
DOE develop a smart grid research and development program, including $100 million per year in 2008-2012 for
demonstration projects.
National Institute of Standards and Technology (NIST) develop a framework for the standards and protocols for the
inter-connection of smart grid devices and systems.
Federal Energy Regulatory Commission (FERC) adopt such standards and protocols.
DOE administer a matching grant program to pay for one-fifth of smart grid investment costs.
State regulators consider requiring and funding smart grid investments.

2. Page 2
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
Smart Grid Components
While still new enough to lack a universally agreed upon definition, some typical components of a smart grid include:
Intelligent appliances capable of deciding when to consume power based on pre-set customer preferences. This can
go a long way toward reducing peak loads which has a major impact on electricity generation costs - alleviating the
need for new power plants and cutting down on damaging greenhouse emissions. Early tests with smart grids have
shown that consumers can save up to 25% on their energy usage by simply providing them with information on
that usage and the tools to manage it.
Smart power meters featuring two-way communications between consumers and power providers to automate
billing data collection, detect outages and dispatch repair crews to the correct location faster.
Smart substations that include monitoring and control of critical and non-critical operational data such as power
factor performance, breaker, transformer and battery status, security, etc.
Smart distribution that is self-healing, self-balancing and self-optimizing including superconducting cables for long
distance transmission, and automated monitoring and analysis tools capable of detecting or even predicting cable
and failures based on real-time data about weather, outage history, etc.
Smart generation capable of "learning" the unique behavior of power generation resources to optimize energy
production, and to automatically maintain voltage, frequency and power factor standards based on feedback from
multiple points in the grid.
Universal access to affordable, low-carbon electrical power generation (e.g., wind turbines, concentrating solar
power systems, photovoltaic panels) and storage (e.g., in batteries, flywheels or super-capacitors or in plug-in
hybrid electric vehicles).
Smart Grid Technologies
For DOE's Modern Grid Strategy, the specific technologies of the smart grid are grouped into the following five areas:
Integrated Communications include data acquisition, protection, and control, and enable users to interact with
intelligent electronic devices in an integrated system.
Sensing and Measurement technologies support acquiring data to evaluate the health and integrity of the grid and
support automatic meter reading, elimination of billing estimates, and prevent energy theft.
Advanced Components are used to determine the electrical behavior of the grid and can be applied in either
standalone applications or connected together to create complex systems such as microgrids. The success,
availability, and affordability of these components will be based on fundamental research and development (R&D)
gains in power electronics, superconductivity, materials, chemistry, and microelectronics.

3. Page 3
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
Advanced Control Methods are the devices and algorithms that will analyze, diagnose, and predict grid conditions
and autonomously take appropriate corrective actions to eliminate, mitigate, and prevent outages and power
quality disturbances.
Improved Interfaces and Decision Support convert complex power-system data into information that can be easily
understood by grid operators.
Smart Grid Benefits
The U.S. Department of Energy's (DOE's) National Energy Technology Laboratory (NETL) states that the "Modern Grid"
will have seven key benefits for consumers, business, utilities and the Nation:
Self-Healing
A smart grid automatically detects and responds to routine problems and quickly recovers if they occur, minimizing
downtime and financial loss.
Motivates and Includes the Consumer
A smart grid gives all consumers - industrial, commercial, and residential - visibility into real-time pricing, and
affords them the opportunity to choose the volume of consumption and price that best suits their needs.
Resists Attack
A smart grid has security built-in from the ground up.
Provides Power Quality for 21st Century Needs
A smart grid provides power free of sags, spikes, disturbances and interruptions. It is suitable for use by the data
centers, computers, electronics and robotic manufacturing that will power our future economy.
Accommodates All Generation and Storage Options
A smart grid enables "plug-and-play" interconnection to multiple and distributed sources of power and storage
(e.g., wind, solar, battery storage, etc.)
Enables Markets
By providing consistently dependable coast-to-coast operation, a smart grid supports energy markets that
encourage both investment and innovation.
Optimizes Assets and Operates Efficiently
A smart grid enables us to build less new infrastructure, transmit more power through existing systems, and
thereby spend less to operate and maintain the grid.

4. Page 4
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
Smart Grid Challenges
Major change usually entails substantial challenges, and the smart grid is no exception. DOE's National Energy
Technology Laboratory report, A Systems View of the Modern Grid, lists the following as major barriers to achieving
smart grids:
Financial Resources
The business case for a self-healing grid is good, particularly if it includes societal benefits. But regulators will
require extensive proof before authorizing major investments based heavily on societal benefits.
Government Support
The industry may not have the financial capacity to fund new technologies without the aid of government programs
to provide incentives to invest. The utility industry is capital-intensive, with $800 billion in assets, but it has
undergone hard times in the marketplace and some utilities have impaired financial ratings.
Compatible Equipment
Some older equipment must be replaced as it cannot be retrofitted to be compatible with smart grid technologies.
This may present a problem for utilities and regulators since keeping equipment beyond its depreciated life
minimizes the capital cost to consumers. Early retirement of equipment may become an issue.
Speed of Technology Development
The solar shingle, the basement fuel cell, and the chimney wind generator were predicted 50 years ago as an
integral part of the home of the future. This modest historical progress will need to accelerate.
Policy and Regulation
Utility commissions frequently take a parochial view of new construction projects. A critical circuit tie crossing
state boundaries has historically met significant resistance. The state financing the project may not always be the
one benefiting most from it. Unless an attractive return on smart grid investments is encouraged, utilities will
remain reluctant to invest in new technologies.
Cooperation
The challenge for 3,000 diverse utilities will be the cooperation needed to install critical circuit ties and freely
exchange information to implement smart grid concepts.

5. Page 5
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
A Sampling of U.S. Smart Grid Projects
Xcel Energy
In May, 2008, Xcel began implementation of a smart grid network in Boulder, CO. SmartGridCityTM is a multi-phase
project planned for completion in December 2009. It is expected to provide customers with a portfolio of smart grid
technologies designed to provide environmental, financial and operational benefits.
Centerpoint Energy
In May, 2008, CenterPoint Energy filed with the Texas Public Utility Commission (PUC) for an Advanced Metering
System (AMS) initial deployment plan. The Company anticipates that it would begin deployment of up to 250,000
interactive meters and related infrastructure over a three-year period.
Oncor
In March 2007, Oncor became the world's first utility to install S&C Electric Company's new TripSaver Dropout
RecloserTM as a part of a Smart Grid initiative in which the electric grid will monitor, think, act, repair and prepare
itself to respond quickly to consumer needs. The Smart Grid will heal itself, sense outages as they occur, monitor
equipment performance, report back on needed maintenance, and more, all of which will result in an increase in
reliability and service quality.
Southern California Edison
Between 2009 and 2012, Southern California Edison plans to replace more than 5 million existing traditional electric
meters with next-generation smart devices, making possible money-saving time-differentiated rates and demand
response options as well as home area connectivity with appliances of the future. The new meter system will allow
Edison customers with smart, communicating thermostats and appliances to set them to respond automatically to
periods of peak pricing and grid emergencies, potentially reducing overall peak demand on Edison's grid by as much as
1,000 megawatts -the output of a major power plant. The company also has a joint program with the Ford Motor
Company to explore the plug-in hybrid vehicles and vehicle-to-grid technology.
Pacific Gas & Electric
Pacific Gas and Electric is partnering with Tesla Motors to further evolve vehicle-to-grid (V2G) technology by
researching smart charging - a form of V2G designed to allow remote control charging of electric vehicles connected to
the power grid.

6. Page 6
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
American Electric Power
American Electric Power is currently deploying advanced metering and an enhanced infra-structure. Initially systems
are expected to be in place by 2010, and will be fully deployed by 2015 to more than five million customers. The
company is also collaborating with General Electric to address the full energy pathway from the power plant to the
home.
San Diego Gas and Electric
San Diego Gas and Electric is currently deploying smart metering technology that will enable customers to remotely
control many different automated digital devices. For example, a homeowner on vacation can use a cell phone to switch
appliances on or off, arm a home security system, control temperature gauges, control lighting or program a home
entertainment system. On a hot day, the smart meter can send a signal to the home area network to help conserve
energy, e.g., a smart refrigerator could reduce energy consumption for the duration of the conservation effort.
A Sampling of Smart Grid Projects in Europe
For an overview of the smart grid revolution in Europe see European Technology Platform (ETP) Smart Grids. It
describes how Europe plans to integrate solar power from the South, wave power from the West, and wind power from
the North to build the "smart grids of the future" capable of readily transferring bulk power across national boundaries.
As detailed in a recent report, "Dispower, Distributed Generation with High Penetration of Renewable Energy Sources",
Europe's power grid "is facing a dramatic change in the near future." As a consequence of European obligations
resulting from the Kyoto protocol, the European Commission has set as a goal, the doubling of power generation from
renewable energy sources by 2010. To meet this target, the Dispower project was conceived with many partners and a
large budget, and the Dispower team has participated in the following smart grid pilot projects:
Settlement "Am Steinweg" in Stutensee, Germany (Dispower Report, Pg. 79)
This pilot represents a typical residential area. It presents only residential loads in a low voltage grid connected to
one transformer. The site is a good example of distributed generation with a large percentage of renewable energy
into a low voltage grid. One experiment called, "washing with the sun", consisted of alerting 22 families as to which
time periods they could make optimal use of solar energy. Families who responded were credited with a financial
bonus on their electric bill. The report states that, " large percentage of these families responded favorably to this
opportunity.

7. Page 7
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
San Agustin del Guadalix, Spain (Dispower Report, Pg. 80)
This pilot includes both residential and commercial consumers. It consists of power supplied to building loads as
well as to an experimental grid that supports the installation and re-configuration of a number of distributed
components, and incorporates a variety of different power generating units such as photovoltaic panels, wind
turbines and diesel generators. The energy management system enables power quality to be monitored and tested
with varying configurations of distributed generators, storage systems and loads.
Supply Centre East, Germany (Disponer Report, Pg. 80)
This pilot incorporates both commercial and industrial loads in six different buildings. Power sources include a
battery system with a bi-directional inverter and a 5.5 kW co-generation plant. It also includes a high-bit-rate
communication system that supports messaging between units solely via their power line connections. The utility
can readily check to see how much it saves by managing the battery operation, and it can thereby benchmark future
pricing to a privately owned Combined Heat and Power (CHP) facility.
A Sampling of Smart Grid Projects in Asia
India
According to Anil Razdan, Central Power Ministry Secretary, India's demand for power is increasing at an annual
rate of 8-10%. In October 2008, the "Smart Grids India" conference will be held to discuss the infrastructure
requirements to "modernize the grid" and to turn a "dumb grid" into a "smart grid". Indian utilities are challenged
to achieve the ambitious target set by the power ministry to provide "Power to all by 2012." According to California
based Echelon, this will take a roughly $100 billion investment in technologies for generation, distribution,
transmission, and monitoring.
India is also home to one of the weakest electric grids in the world. According to its Ministry of Power, India's
transmission and distribution losses are among the highest in the world, averaging 26% of total electricity
production, with some states as high as 62%. When non-technical losses such as energy theft are included in the
total, average losses are as high as 50%. This creates a powerful incentive for introducing smart grid components,
and the meter market in India is estimated at 100 million nodes!
In July, 2008, Rabirashmi Abasan in Kolkata (greater Calcutta area) became the first housing project in India where
residents have the option of generating power in rooftop solar photovoltaic panels, and selling it to the power grid
utility. From now on, their electricity bills will reflect the difference between the energy consumed from the utility
and how much they send to the grid.

8. Page 8
Originally published on the IEEE Emerging Technology portal, 2006—2012.
Visit: http://www.ieee.org/go/emergingtech
Smart Grids
Contributors: Bichlien Hoang
China
In April, 2007, the MIT Forum on the Future of Energy in China took place in Shanghai. This led to the formation of
the Joint US-China Cooperation on Clean Energy (JUCCCE), a Non-Governmental Organization (NGO) dedicated to
bringing together the international expertise and technologies to accelerate the use of clean and efficient energy in
China.
According to JUCCCE, China has a unique opportunity to apply innovative measures to its power grid, as it is
building a new electricity infrastructure at an unprecedented pace. As China rapidly builds new power generation,
new transmission lines, and sells new appliances to consumers, it is important that this extended, integrated
electrical grid be intelligent because China opens a new coal plant (large enough to supply all the households in
Dallas or San Diego) each week!
Since 1/3 of particulate matter pollution in California comes from China, one of JUCCCE's primary goals is to
identify and catalyze a regional pilot for a smart grid in China. In addition, JUCCCE will be giving away 10 million
light bulbs at no cost to households in Shanghai, the pilot city for a Clean Lighting Conversion program. This project
alone will result in the reduction of over 2 million tons of carbon dioxide emissions over the five year lifespan of the
bulbs.