Three Goals of a Carbon Price
Miles McDonald,
Voltaire Power Company
I’m going to sidestep that argument and I’m also going to
concentrate on the Power Sector to the exclusion of all others for this
article. And now I will suggest that a
“Carbon Price” has three goals to achieve in order to use to realize the
ultimate objective of reducing the carbon emissions of the power sector of any
given jurisdiction without jacking the price of energy and killing the economy:
1.
Reduce Demand for Electricity
2.
Re-dispatch (using different generators as first
call)
3.
Lowering the emission profile of new generation
to be brought on-stream
And now I’m going to further suggest that the way to do any
of this is to RECYCLE the revenue of a carbon price, not to remit them to a
government treasury but to the goal of reducing emissions and mitigating the
cost of doing so. How do you ensure that
the revenue stream doesn’t end up in the government coffers? Put the revenue stream in the hands of a
Trustee charged with the goal of reducing emissions and the cost of electricity
where possible.
Will a Carbon Price
achieve these three goals? What are the Problems?
Reducing Electricity
Demand: The problem here is that the
elasticity of price for electricity is actually even smaller than that of
gasoline. And as everyone knows, as the
price of gasoline goes up so does the grumbling; but not the reduction in use.
Re-dispatch: There is a base demand for electricity that
is fulfilled by hydroelectric, nuclear and wind facilities because they have
the lowest marginal cost to produce that electricity. They are also low carbon emitting sources. As demand runs above base, other generators
are called on-stream such as Coal, Fuel Oil and/or Natural Gas, probably in
that order. So how high does a carbon
price need to be to turn off coal and run renewable energy generation? To make a broad statement, you could double
the price of electricity to consumers and reduce emissions by about 5%.
From a consumers point of view, it is the clearing price of
power that matters in a wholesale power market.
Without a really high carbon price you can’t displace coal and a really
high carbon price ain’t going to fly, politically. So, with, say, a $25 carbon price, if demand runs to a level that requires fossil
fuelled generators to run then that higher price of electricity is paid for
every single MWhr of electricity produced at that time. The result is a windfall in gains for
generators with a lower marginal cost of production and that windfall is paid
for by consumers. (residential, commercial and industrial). Basically, the carbon price is passed on to
consumers in a magnified form because even non-emitting generators get the
higher clearing price.
New Generating
Capacity: There is a better argument
here. A Renewable Portfolio Standard,
or a Feed-in Tariff or other proactive government policy allows a market
operator to insert renewable generation at the bottom of the bid stack so that
the (at this time) higher price of renewables is paid for renewable generation
without influencing the clearing price of all other generators.
AND NOW THE GOOD NEWS
McKinsey & Company have a rather famous carbon abatement
curve, as shown below. What it shows is
that Energy Efficiency programs can reduce emissions at an incredibly
inexpensive rate. Follow the curve, as
the cost of abatement climbs steeply and then less so from left to right.
So what is the message here?
If you take the carbon revenue stream and apply it to energy efficiency
programs to ‘buy’ energy efficiencies the cost has been worked out by Robert
Cowart of the Regulatory Assistance Program (RAP) to be about $0.03 per
kWhr. Not bad, eh? Take revenue, buy efficiency and reduce
demand. Reduce demand and reduce the
amount of time that fossil fuel is used to generate electricity and thereby
reduce carbon emissions. Better still,
there are economies of scale in the purchase of energy efficiency programs.
Source: A cost curve for greenhouse gas reduction; The McKinsey Quarterly
CONCLUSIONS
Putting a price on carbon is a great idea, but it is
incomplete. The bottom line is that utilizing
energy efficiency programs, renewable portfolio standards, Feed-in-Tariffs and
other policies greatly accelerate the reduction in GHG emissions. Putting the carbon revenue stream in the
hands of a Trustee with a mandate to reduce GHG emissions ensures that the
overarching ambition is achieved.
Need an example? The
Regional Greenhouse Gas Initiative of the Northeast and Mid-Atlantic states of
the U.S.A. www.rggi.org Read’em and weep.
References
Christian
Hewicker et al, Power Perspectives 2030,
European Climate Foundation







