Nonprofit, nonpartisan journalism. Supported by readers.


Recent trends put Minnesota in good shape to comply with tighter CO2 rules

Coal generation is falling; natural gas and renewables are on the rise.

Annual generation from renewable sources in Minnesota – mostly wind – grew from 12% in 2008 to 21% five years later.

As the U.S. Environmental Protection Agency prepares its final rules to drive down greenhouse-gas emissions from electric power generation, an analysis published today suggests that Minnesota’s utilities may be able to meet the requirements with relative ease.

The report, prepared by Bloomberg New Energy Finance, lists the shift in boiler fuel from coal to natural gas as perhaps the state’s largest single advantage:

Coal is the largest generation source, but natural gas is becoming more important in MN’s power mix, providing 14% of electricity and accounting for 33% installed capacity in 2012, while coal is trending downwards. Coal-fired electricity generation fell from 59% in 2008 to 46% in 2013, and 396MW of coal plants have announced plans to retire between 2015 and 2017.

Courtesy of Bloomberg New Energy Finance and The Business Council for Sustainable Energy
Minnesota’s renewable generation capacity is on the rise.

But there are other factors working in Minnesota’s favor as well:

  • Annual generation from renewable sources – mostly wind – grew from 12% in 2008 to 21% five years later.
  • Minnesota also has become a national leader in energy efficiency, ranking fifth out of the 50 states in one respected assessment, as a result of strong mandates that “have driven state utilities to outspend many of their peers in neighboring states.”
  • Power generation from biomass and waste-to-energy operations are becoming increasingly important, with nine generating plants already doing WTE.
  • Rapidly falling prices mean that it now costs less to build new wind capacity than new coal capacity, even without subsidies; similar trends are gaining momentum on the solar side.
  • Speaking of solar, the report anticipates that utility-scale generation, which quadrupled from four megawatts to 16 between 2012 and 2014, will grow to 644 megawatts in the next five years – at costs comparable to power from advanced natural-gas plants, and lower than for nuclear-powered electricity.

Report's sponsorship

Today’s report was prepared by Nathan Serota, an analyst at Bloomberg New Energy Finance. It was commissioned by the  Business Council for Sustainable Energy, a 23-year old trade and advocacy group devoted to “implementing market-based approaches for reducing pollution and providing a diverse, secure mix of energy resources."

Article continues after advertisement

The council’s board members include top executives from organizations with shared interests but sometimes different stakes in the nation’s energy future, including the Worldwatch Institute and the Alliance to Save Energy, the American Gas Association and United Technologies Corp. (I admit I didn’t see any coal companies on the roster, but several utilities are represented.)

An earlier BNEF/BCSE fact book published in February looks at the national picture; the Minnesota report published today is the second in a series of state-level close-ups.

I asked Serota for his take on the positions staked out by Xcel Energy and Minnesota Power, in particular, in arguing that the EPA’s initial proposal failed to credit all of their past investment against the coming curbs.

He told me that the analysis didn’t look at data for individual utilities, but rather at the state’s overall performance and capabilities in areas important to comply with the EPA rule. The regulation is to be finalized sometime this summer. (Of course, it is also being challenged in court.)

I wondered, too, about the observation in his analysis that Minnesota is a net importer of electricity – producing 51 million megawatt-hours in 2013, while consuming 67 million.

Does that make this one of those rare times when Minnesota might benefit from being at the end of all the pipelines, or in this case a powerline, if the other end is where the emissions assessments are made and the controls applied?

Not necessarily, he said, because compliance strategy will depend not only on the final terms of EPA’s Clean Power Plan but also on how each state elects to comply. Minnesota could partner with another state or states in a joint emissions-reduction plan, or participate in a wider program of trading in emissions credits.

Key power system metrics, Minnesota vs. US average, 2013
MetricUnitsMinnesotaUS averageCommentRank
Total retail electricity salesTWh6773Below average
electricity demand
Total generationTWh5180Below average
in-state generation
Retail electricity sales per capitaMWh12.411.6Above average
per capita demand
Retail electricity prices¢/KWh9.510.1Below average
electricity prices
Generation from gas%1328Below average
reliance on gas for electricity
Generation from gas and renewables%3341Below average
reliance on gas and renewables
Energy efficiency scoreACEEE index25.519.2Above average
on efficiency efforts
Utility energy efficiency budget% state revenue2.421.13Above average
utility efficiency budget
CO2 emissions ratetCO2/MWh0.560.52Dirtier than average
generation profile
'Adjusted' emissions rate cut%4238Above average
'ask' under the Plan
Source: Bloomberg New Energy Finance and The Business Council for Sustainable Energy, EIA, US Census Bureau, ACEEE

Experience counts

The main point to keep in mind, he said, is that Minnesota already has a strong framework of policies and requirements in place on most aspects of reducing emissions, expanding renewables and promoting efficiency.

So it benefits from experience in knowing how things work and what they cost, where to find flexibilities and where to look for tradeoffs. This applies across the board – from efficiency standards to renewables to experience with high-efficiency plants using combined-cycle gas turbines, or CCGTs.

Article continues after advertisement

On the latter point, he said, the analysis shows that Minnesota ranks last or nearly last among the states in utilization of its CCGTs, meaning the percentage of generating capacity that is actually being used to make power. So there’s significant capacity as yet unused.

Some other interesting points from Serota’s analysis:

  • While Minnesota ranks a little below average among the 50 states in total electric consumption, it ranks a bit above average in per capita consumption. (We use less than California, more than the average Californian.)
  • The retail price of electricity in Minnesota was about 9 cents per kilowatt hour in 2013, up 23 percent over the preceding 5 years. That was still somewhat below the national average, but the national number has been rising more slowly so the gap is narrowing.
  • Although the share of Minnesota electricity produced by burning coal is dropping significantly, the state’s generating profile remains “dirtier” than the national average as measured in carbon dioxide emissions.
  • Pointing to an Xcel Energy study, Minnesota is positioned to achieve efficiency gains equivalent to 7 million megawatt hours a year by 2020, at economically justifiable costs, and up to 10 million if the economics change.

 Which is pretty important because, after all, the cleanest (and cheapest) megawatt-hour is the one you don’t consume at all.