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Gridlock - we
use that term to describe an overloaded highway system. While not a
perfect analogy, it could also be used to explain the recent
historical blackout in August that shut down much of the
Northeast United States.
In some areas of
the country we are trying to transport electricity over a two-lane
blacktop when we really need a four-lane interstate highway. When an
accident happens on this electrical highway, traffic has to be
re-routed to another transmission line in microseconds. If that line
can’t handle the traffic it can shutdown because of the overload,
cause another line to reach overload conditions, and trip
generators off before they are damaged. If the outage is
not isolated a cascading domino effect spreads across the
grid.
Three facts were
made painfully clear to everyone after this most recent blackout.
First, we were reminded of how incredibly dependent we are on
electricity. Secondly, electricity is normally so reliable that we
have taken it for granted. And third, we have to do something to
improve transmission line reliability.
Although a lot
of finger pointing is still going on, the bottom line is the warning
signs were there and the signs were ignored. Our demand for
electricity has grown, but the transmission system needed to
transport it has not. At the same time we’ve changed the rules and
tried to create a competitive market on a monopoly-based
transmission system. The price tag to catch up has been estimated to
be between $50 and $100 billion. That could mean the average U.S.
consumer would see a $100 annual power bill increase. The good news
is we could see cost savings of five times that if an efficient
transmission system is built.
Bob Harbour,
Vice President of Generation and Operations for Continental
Cooperative Services (CCS), a generation and transmission
cooperative serving Illinois, New Jersey and Pennsylvania, says the
cost could be less. “But, there is no doubt we will see increased
costs in our high voltage transmission bills.”
Although an
outage like this could occur in Illinois, co-ops here were
unaffected by the blackout. However, Harbour says CCS lost one
hydroelectric generator briefly and nearly 25 substations, mostly in
northwest Pennsylvania. “These substations were lost due to the
transmission lines owned by investor owned utilities tripping
off,” says Harbour.
Harbour served
as Chairman of the Mid-America Interconnected Network (MAIN), one of
10 regional reliability councils under the North American Electric
Reliability Council (NERC).
NERC’s mission
is to ensure that the bulk electric system in North America is
reliable, adequate and secure. Since its formation in 1968, after a
major blackout, NERC has operated successfully as a voluntary
organization, relying on reciprocity, peer pressure and the mutual
self-interest of all those involved to create a reliable
transmission grid.
Harbour says
NERC standards are voluntary and not enforceable, but penalties for
not complying with the standards have been included in the energy
bill now being reviewed by a U.S. Senate and House conference
committee.
Regional
Transmission Operators (RTOs) have also been put in place in many
areas to independently oversee regional transmission grids. Harbour
says RTOs can help, but should not replace existing control area
operators. “Regional operators cannot know all of the details of the
vast system they are monitoring. Even with electronic monitoring and
alarms, every situation cannot be pre-programmed. We need both
existing control area operators as well as the regional
operators.”
Harbour says
co-ops have installed more generation and have long term plans to
assure sufficient generation, but transmission is still in need of
upgrading and expansion. Much of the transmission capacity serving
co-ops is owned by investor-owned utilities.
Harbour says in
most of the country deregulation so far has increased price
volatility and increased wholesale power cost to small consumers,
decreased reliability and bankrupted energy suppliers. “We need some
re-regulation. We need to pass NERC’s reliability language, and we
need to closely review the Federal Energy Regulatory Commission’s
Standard Market Design idea.” He adds that to build more
transmission line capacity will require a better rate of return and
less risk on transmission line investment, and federal right of
eminent domain where transmission construction has been
stopped.
Tim Reeves,
President and General Manager of Southern Illinois Power
Cooperative (SIPC), Marion, says obtaining right of way agreements
is one of the biggest impediments to building new transmission
lines. SIPC provides power to three southern Illinois co-ops over
its own transmission lines. Transmission lines owned by Illinois
Power serve three other SIPC co-ops.
“In the last 10
years I don’t know of anyone that hasn’t had problems acquiring
right of way,” says Reeves. “We are working on a new 161 kv
transmission line that will go to one of our load centers, but the
problem is getting right of way. It takes years.” He adds that often
the process ends up stuck in courts.
Reeves also
serves on a MAIN committee. He says that all utilities in the MAIN
region are committed to reserving generation capacity for
emergencies. “We keep a percentage of the largest unit in
spinning reserves. If even the largest unit in our region, which is
1,200 mw, trips off we can ramp up and put power back
online.”
Peaking capacity
has also been added but that has only added to the transmission
capacity issue since most peaking plants have been located far away
from metropolitan load centers and power, requiring even more
transmission capacity. “Transmission lines were built to serve local
utility loads. Then they were interconnected. Now on top of all of
that we deregulated the transmission system and people can buy and
sell power across the system. We added this third layer of use on
the transmission system and we have added capacity. The problem is
not going to go away in a short period of time.”
Could a blackout
like this happen in Illinois? Both Harbour and Reeves say yes. But
Reeves says, “The worst transmission congestion in Illinois is the
interconnect going north to Wisconsin. But there are areas of
southern Illinois that are limited during peak load
periods.”
Reeves adds that
as bad as this blackout was the system worked. The Eastern
Interconnect goes from the Rocky Mountains east, excluding Texas,
and we didn’t trip off here in Illinois. Eventually the system
worked, not as quickly as it should have, but it stopped
it.”
What can co-op
members do? Harbour says most major outages are still caused by
weather events like ice storms. He says, “Prepare for blackouts the
same as you would for an ice storm. Keep the freezer door closed.
Protect your water supply. Make plans and prepare for freezing
weather, and do the same for your livestock.”
For more
information on being prepared for outages talk to your local
electric cooperative representative, or go to the Illinois Electric
Council’s Web site http://www.iecouncil.org/.
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