The New [Smart] Colossus
"It is a colossal task. But it is a task that must be done." So declares the title page
of the Department of Energy's propaganda publication, The Smart Grid: An Introduction
Ask around what peoples' opinions are the of the Smart Grid, and you will find they run the gamut from clueless, to passionate support,
to paranoid resistance. As with so many of the advancements and implementations of leading edge technology, my otherwise great enthusiasm
for the Smart Grid is tempered by the extremists who want to wag their hypocritical fingers in my face and tell me that if I do not embrace
their cause, then that makes me a bad person. Most of the hyperventilating zealots are utterly ignorant of the science behind the things
they bloviate over, typically receiving their version of the "truth" from some equally ignorant soul (often a Hollyweird celeb or network
For many years, the existing electrical distribution infrastructure (the "Grid") in the U.S. has been operating on the
brink of failure. Demand for electric power has increased significantly in the past two decades as both consumer and commercial/industrial
electronics have permeated all aspects of life. Computers dominate the landscape, large screen televisions (which actually consume more power
than their CRT predecessors) can be found in multiple rooms of most homes, microprocessors control our coffee makers, refrigerators, and
clothes washers. People of all ages carry at least one battery-powered mobile device, which has a charger sitting at home (probably, unfortunately,
left plugged in all the time). Electronic toys and tools that run on rechargeable batteries fill the shelves. Individually, each item might
not consume a lot of power, but collectively the demand is enormous.
Add to that the increasing average square footage of houses along
with a commensurate requirement for more heating and air conditioning, and the national population growth that increases the overall electricity
needs, and it is no surprise that since 1982, growth in peak demand for electricity has exceeded transmission growth by nearly 25% every
year. Gee, it is a good thing our manufacturing base has dropped so precipitously in the same period, or we would be in real trouble with
all those motors, heating and cooling, and process equipment needs that would have to be supplied (just a bit of gallows humor, as the Prez
As of 2008, America's electric grid consisted of more than 9,200 electric generating units with more than 1,000,000 megawatts
of generating capacity, connected to more than 300,000 miles of transmission lines. The entire system is tied together through a complex
mesh of generation, transformers, transmission lines, switching stations, monitoring equipment, and incredibly complex control centers. Software
running the whole show uses complex supervisory, predictive, reactive, and control algorithms that rival space program applications. Ph.D.
theses are earned in all realms of creating, improving, maintaining, and operating this enormous Grid. The DoE claims that even with all
the opportunities for malfunctions, today’s electricity system is 99.97% reliable. That reliability number sounds good, but it amounts to
an average of 2.5 hours per year (≈1 second per hour) of power outages for you.
There have been five massive blackouts
over the past 40 years, three of which have occurred in the past nine years. The last
occurred in August of 2003
and was triggered by overgrown tree branches. A deficiency in communications software that coordinated grid connections and fault isolation
failed to react properly, causing a cascade of shut-downs across much of the Northeast and upper Midwest. The Department of Energy's Smart
Grid is supposed to fix the problem.
A lot of the hysteria over the Smart Grid is focused on how the government will be able to use
smart electric (and gas and water) meters, along with appropriately equipped appliances (ovens, air conditioners, etc.) to override personal
settings and impose a bureaucratic mandate on usage. If, as is common in southern California during scorching summer days, the demand for
electricity exceeds the system's ability to service everyone who wants power, then, Big Brother can selectively crank back your thermostat
setting to limit air conditioners to a balmy 76 degrees rather than the 70 degrees where you have it set. If things get really tight, maybe
it will be necessary to shut down the clothes dryers of every house in LA from 2:00 PM through 7:00 PM. You will not have any control over
it. That is the fear, anyway.
Trust us, says the government, that is not a planned feature of the Smart Grid. After all, it even says
as much in that The Smart Grid: An Introduction
earlier. To wit on page 14, "People are often confused by the terms Smart Grid and smart meters. Are they not the same thing? Not exactly."
It's the "not exactly" part that gives me pause. That means in some inexact
way, yeah, maybe - just maybe - it could possibly
be the same thing.
Smart meters have been around a long time. Way back in the early 1990s, I worked for a company that developed the first vehicle-mounted
remote meter reading system. Some pretty ingenuous people designed and implemented the system a few years before I arrived. My job was to
try to help improve it a bit. This system used a very low power transmitter and superregenerative receiver
(Tx and Rx shared a single transistor amplifier) mounted on electric, gas, and water meters
to communicate with a computer-controlled transponder mounted in a big black box in a van. The van, intended for dense urban environments,
could be driven at up to 40 mph at a distance of up to 1,000 feet from the meters and record 99% of the readings. Missed reading were still
done manually, but the labor expenses for utility companies were reduced significantly. The meters, depending on their design, were capable
of reporting not just consumption data, but other information like attempts at tampering, service interruption, etc. In the works when I
left were much more complex meters that would monitor 3-phase services and include power factor information.
Supervisory Control and
Data Acquisition (SCADA) for the electric grid has been around for decades. It is responsible for monitoring, reporting, and controlling
conditions on the grid. Ranging from the smallest substations to the monster switching station yards, this is the primary system that keeps
electricity flowing (to use the vernacular) to your house and place of business. You might be shocked (no pun intended) to learn how antiquated
a large portion of the equipment is. Having worked for an electric utility for a short whole, I was introduced to a some of the installations.
I kid you not that, at least at the time, at one of the hydro power generators on the Potomac River actually had a belt connecting the impeller
to the generator gear box (although I never actually saw it).
the time the engineering office where I worked was retrofitting smaller substations with SCADA equipment that communicated back to the main
office via a 4,800 Baud telephone modem. Much of the long distance communications between switching stations and the central control stations
was accomplished via power line carrier (PLC). I sat in on a 2-day class for it - pretty cool considering its age. Much of that system was
being replaced with microwave communications. There might not be much PLC used any more, if for no other reason than it would present a very
vulnerable security breach point. By the way, power line carrier is the method that would be used by power companies to control your household
appliances if the Dark Side of the Force ever gains control as feared.
So, the reality is that a couple major issues are at hand.
One is that infrastructure is enormously expensive to build, maintain, and update. Trying to implement any new physical construction, be
it generation plants, transmission lines, or switching stations, means years of legal battles, Public Utility Commission (PUC) hearings,
citizen protests, and political processes; the familiar NIMBY (not in my back yard) syndrome kicks in on a huge scale. Another is that the
existing system is vulnerable to equipment failure, terrorist attack, and an inability to keep up with demand; that causes untold loss in
productivity, revenue, and even loss of life (due to lack of heat or air conditioning). Ultimately, much needed improvement is either abandoned
or band-aided yet again.
Past efforts at improving the existing system have paid out great rewards. Methods of load sharing and load
shedding, power factor correction, voluntary off-peak consumption, updating of household and commercial equipment to more efficient models,
training people to turn off lights (yes, even to use CFL bulbs) and computers when not in use, and a host of other concepts have managed
to extend the capability of our electric grid well beyond its original design. Compliance has been mostly voluntary through financial incentives.
Rotating blackouts have been needed in extreme cases. It could get a lot worse.
It has been said that America's success has been enabled
through our energy, communications, and transportation infrastructure. To cripple any of them cripples the country's ability to progress
and compete in a global market. Of course, if you are reading this and are not an American, you can apply the same arguments to your own
country. Accordingly, I am a proponent of the current plans to repair and improve long-neglected utilities, roads and bridges, and other
essential systems. No, I do not trust the government to do or even oversee the job; fortunately, most of the actual work will be carried
out by private contractors. The Smart Grid, if implemented as advertised, will add a significant degree of robustness and capacity to the
power distribution system (including protection against terrorist attacks). It will take diligence on the part of the people to assure that
civil rights are not abused in the process. As the saying goes, "The road to Hell is paved with good intentions."
This is indeed
the new colossus
. Not one of the type written about by Emma Lazarus,
this is a looming distributed behemoth that threatens the long-term health of our society if not addressed in a serious manner. Ignore it
for too long, and those tempest-tossed, huddled masses yearning to be free might not be able to see the (electric) lamp that
lifts beside the golden door.
A huge collection of my 'Factoids' can be accessed from my 'Kirt's Cogitations'
table of contents.
Topical Smorgasbord, another manifestation of Factoids,
are be found on these pages:
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All pertain to topics that are related to the general engineering and science theme
of RF Cafe.