
FM Radio Offers Intriguing Demand Response Solution - by Patti Harper-Slaboszewicz Daily IssueAlert 11/11/2005
Free As
discussion intensifies in California concerning Pacific Gas and
Electric Company's (PG&E) plan for advanced metering, demand
response and predeployment expenses, advances in communications based
on high definition FM radio technology may challenge common assumptions
of how to best implement automated controls for price responsive demand
response programs. Rather than use the advanced metering network to
communicate with customers or customer thermostats, one interesting
concept is to use FM radio to send pricing information to customer
locations. e-Radio USA (www.e-radiousa.com)
is developing a product, Utility Message Channel (UMC) for the utility
industry that will allow utilities or other demand response providers
to have e-Radio USA send price signals to thermostats, appliance
controllers, or in-home display devices. One advantage is that it gives
utilities another flexible technology choice that can operate
cost-effectively in parallel with AMI systems—so utilities can proceed
with their plans for advanced metering using AMI systems that have been
successfully deployed by other utilities without putting all of their
eggs in a single technology basket.
High definition (HD) FM radio is the emerging next generation digital
technology for the radio broadcasting industry in the United States.
This technology will offer enhanced audio features and data delivery
capabilities. The current number of transmitting HD Radio stations is
approximately 500, and this is expected to grow to 2,500 over the next
few years. HD Radio stations are mostly located in larger population
centers and this will likely be true for some time to come. The largest
radio broadcasting companies have committed significant capital to
convert their analog stations to digital HD transmission. e-Radio USA
products will work with either analog or HD digital signals, allowing
for a smooth transition from analog to digital.
By considering the use of two networks rather than one, it
changes the picture for demand response considerably. It is no longer
necessary to insist on two-way communication all the way to the meter
to allow for future requirements to send pricing information to
customer thermostats. Meters can focus on measuring energy and
communicating with AMI systems rather than taking on the role of a
gateway into the home. To use the FM network to communicate to
customers requires no new network infrastructure since FM radio
stations already exist and service other industries, and importantly,
continue to operate during outages (this assumes a battery-powered
information display device, of course). Within the customer home, the
equipment required (programmable communication thermostats, in-home
display devices, other controllers) could receive pricing information
directly rather than relying on many connections of an AMI network.
e-Radio USA is participating in the Title-24 activities in California
to establish guidelines for communication with customer owned
thermostats, and plans to design its UMC receiver to be compatible with
those requirements.
Utilities in other states may find the e-Radio USA offering of
interest, especially if the utility has already installed an automated
meter reading (AMR) system. Using FM radio technology, the demand
response program can overlay an existing AMR system, even mobile RF
systems. FM radio has tremendous coverage, providing coverage to almost
every home in the United States. Critical peak pricing information can
also be targeted to relatively small areas allowing demand response
events to be called for localized problems as well as across the entire
service territory or region. Cost is always a consideration, and the
e-Radio USA receiver and usage charges are expected to be competitive
with paging communications. e-Radio USA currently has software
installed in radio stations that has been designed to manage
communications, requiring utilities to only select the group of
customers, and e-Radio USA takes it from there. e-Radio USA is planning
to work with demand response providers and other vendors to incorporate
their receiver technology into their products, and recently
participated in the Energy Venture Fair in Boston.
HD radio receivers are expected to scale in the home and
automobile industry in 2006. While analog FM radios in cars have a
display that usually show the name of the artist and song while the
occupants listen to the music, the emerging digital technology of radio
broadcasting will allow more and different types of data to be
displayed in cars. The data is embedded within the FM signal, which
means that anywhere a customer can listen to an FM station, a utility
or other provider can send a pricing signal to the customer location.
e-Radio USA is also developing a traffic information service that
provides useful information to the driver based on the current location
of the vehicle. If there is traffic alert, the radio indicates the
availability of the alert, and the driver can choose to read the alert.
The driver is only shown information relevant to his or her current
location, and does not have to listen to traffic updates for another
freeway or a location across town.
Utilities are in the best position to select the most effective
method for measuring energy usage to support critical peak pricing or
other time-based rate options. In fact, it is likely that the most
stringent demands for obtaining AMI data such as outage alarms stem
from utility operational needs rather than to support demand response
programs. Energy measurement occurs at the customer meter, often
located outside or in the basement, away from most customer activity.
Customer information needs to be provided to the customer, or perhaps
to customer owned equipment, to allow for automated response to the
pricing information supplied by the utility. Thus, meter reads need to
be transmitted from the customer meter to the utility and pricing
information needs to be communicated from the utility to the customer
or customer equipment. There may be distinct advantages from utilizing
separate networks to accomplish each of these functions.
Consider outages. Utilities have found customers value
information on the expected duration of an outage. Since e-Radio USA
will be able to target the information to small geographical areas
(within 100 feet) using the HD technology, utilities could use the FM
radio to provide expected repair times down to the distribution
transformer level and eventually, to the individual home. Since most
thermostats operate on a battery, the thermostat should continue to
display during an outage. This is another example of how using two
networks can provide superior service than using one network. Using one
network, in order to provide this information to the customer within
their home, every node on the AMI network would have to remain powered
by battery backup during an outage. Using two networks, this is not
required. Battery backup on the AMI network can be determined on the
basis of outage detection, restoration, and meter reading requirements
rather than on customer communication requirements.
Municipal utilities may find the e-Radio USA UMC product
appealing for its ability to also transmit messages during emergencies,
such as Amber alerts or evacuations due to a fire or flood. Chart 1 e-Radio USA UMC Architecture below shows the overall architecture of the proposed e-Radio USA UMC product.
Chart 1 e-Radio USA UMC Architecture
Source: e-Radio USA
e-Radio USA is in the process of developing low cost chip sets to allow
utilities to send customer specific usage information as well. This
would allow utilities to use UMC to send customers updates on their
usage at regularly scheduled intervals.
As a graduate student in economics at UC Berkeley, I developed a rule
of thumb that if a problem seemed "too hard," I would start over.
Usually I found that I had made an assumption that sent me down a wrong
path, and only by starting over could I see the error and find the
solution. The "error" in this case may be the assumption that using one
network to do it all is better. Many of the new, costly requirements
being considered today for AMI networks stem from an assumption that
these networks must be the be-all and end-all of utility communications
to the home. They are being asked to perform communications with
customers, provide a robust network for meter reading, enable appliance
control, and many other functions. Yet utilities (and other businesses)
have always used multiple communications networks—mail, phone, voice
radio, data radio, the Internet, mass media—and will continue to do so,
since different networks have different advantages for different
purposes. Within metering, virtually every utility has some manual
meter reading and some telephone-based commercial/industrial AMR, even
for those utilities that have rolled out large-scale wireless or power
line carrier AMR deployments. PG&E, in working to achieve the most
cost-effective business case, is planning one technology for electric
meters, one for gas meters, and the retention of telephone and other
technologies for at least some of its largest customers.
In explicitly planning for using more than one network, utilities and
regulators are likely to find a more cost effective, flexible, and
reliable solution, and be more confident that proceeding ahead with
large-scale AMI deployments will not lead to technology dead-ends, but
successful, multi-lane highways. IssueAlert Archive
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