Why the Time is Right for Microgrids

Nov. 11, 2014
The time is right for microgrids. And it’s not just to protect our power supply from severe storms, as our new Think Microgrid report explains. Here’s another excerpt from The Energy Efficient Microgrid.

The time is right for microgrids. And it’s not just to protect our power supply from severe storms, as our new Think Microgrid report explains. Here’s an excerpt. 

It wasn’t just the severity of Superstorm Sandy (See related article) that led to today’s new emphasis on grid resiliency and microgrids; it was also the timing. A convergence of other events – economic, technological and market – made North America ripe for microgrids and distributed energy.

First, the prices of natural gas – the fuel most often used in combined heat and power (CHP) microgrids – fell dramatically in 2008. More efficient drilling and growing abundance of supply contributed to the price drop. This created low-cost and ample fuel for CHP microgrids.

The forecast for natural gas continues to be bullish, with the US Information Administration predicting a 56 percentincrease in total natural gas production from 2012 to 2040. The American Gas Association says a 100 to 150-year gas supply exists in North America. Such fuel availability bodes well for future development of CHP and district energy (DE) microgrids.

Second, software and technology developers have bought new, affordable programs, communication networks and controls to microgrids.  As a result, today’s microgrids can interact in a smarter more flexible way with the outside grid. They also can manage with greater sophistication their own resources – load, generation dispatch, fuels, and storage. Scalable and efficient gas turbines are now economically competitive and deployable in multiple settings in size ranges ideal for city districts, campuses and connected communities.

Third, several market changes are under way that encourage microgrid adoption.

Wholesale energy markets increasingly allow participation of distributed energy resources. This gives grid-connected microgrids an opportunity to earn revenue in return for services they provide that strengthen the larger grid. These include demand response, or balancing, frequency and regulation services.

Other factors that may lead to more microgrids include:

  • A market is developing for distributed energy resources as ‘non-transmission alternatives’ (NTAs). In this case, a microgrid might avert grid congestion and reduce locational marginal prices. Or an NTA may fill a new supply need, and do so in a less expensive, less intrusive way than a large transmission line.
  • Microgrids, CHP and district energy can help North America reach various emissions reductions goals and requirements. These environmental efforts – along with the low cost of natural gas – are encouraging retirement of coal-fired plants at a surprising rate. North America needs to replace the retiring plants. CHP and district energy offer a cleaner, more efficient alternative.
And finally, some jurisdictions are beginning to create rules to foster distributed energy markets that are akin to existing wholesale power markets. This creates an opportunity for owners of microgrids to monetize their asset in energy trading and realize its full value.

“There is a lot of new investment that will be required in our electric distribution infrastructure. Most transformers are 30 years old. There needs to be transmission upgrades for renewables. Having distribution generation circumvents those needs. Yet, we’re still in that old mentality of let’s build large central plants and run wires.” Chris Lyons, Manager of Power Generation, Solar Turbines

Read the full report, The Energy Efficient Microgrid: What Combined Heat & Power and District Energy Bring to the Microgrid Revolution, provided as a free download, courtesy of Solar Turbines and the International District Energy Association.

About the Author

Elisa Wood | Editor-in-Chief

Elisa Wood is an award-winning writer and editor who specializes in the energy industry. She is chief editor and co-founder of Microgrid Knowledge and serves as co-host of the publication’s popular conference series. She also co-founded RealEnergyWriters.com, where she continues to lead a team of energy writers who produce content for energy companies and advocacy organizations.

She has been writing about energy for more than two decades and is published widely. Her work can be found in prominent energy business journals as well as mainstream publications. She has been quoted by NPR, the Wall Street Journal and other notable media outlets.

“For an especially readable voice in the industry, the most consistent interpreter across these years has been the energy journalist Elisa Wood, whose Microgrid Knowledge (and conference) has aggregated more stories better than any other feed of its time,” wrote Malcolm McCullough, in the book, Downtime on the Microgrid, published by MIT Press in 2020.

Twitter: @ElisaWood

LinkedIn: Elisa Wood

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