Navigant Research Blog

Resilience Movement Hits the West Coast

— August 1, 2016

GeneratorThe focus of state programs designed to boost resilience have been microgrid and nanogrid projects on the East Coast launched in response to extreme weather events such as Hurricanes Irene and Sandy. Since 2011, a parade of states have launched state-funded programs: Connecticut; Maryland, Massachusetts; New Jersey; New York, Rhode Island, and Washington, D.C., among others. A quick glance at some statistics underscores why governments see value in public investments to improve the resilience of regional power grids.

Since 1980, the United States has sustained more than 144 weather disasters with damages reaching or exceeding $1 billion each. The total cost of these 144 events exceeds $1 trillion, according to the U.S. Department of Commerce. According to the president’s U.S. Council of Economic Advisers and the U.S. Department of Energy (DOE), severe weather-related electricity outages cost the U.S. economy more than $336 billion dollars between 2003 and 2012.

Resilience in San Francisco

The perception that this resilience movement is an East Coast phenomenon is being challenged by a program launched in San Francisco. Rather than being focused on threats that can be anticipated via new weather forecasting techniques, the program is focused on a threat somewhat confined to the West Coast: earthquakes.

What would happen to the electricity and natural gas infrastructure of San Francisco if an earthquake equivalent to the 1906 event occurred today? A project developed by the City and County of San Francisco’s Department of the Environment looked into that question. Entitled the Solar+Storage for Resiliency project, the early results of modeling are quite sobering. While 96% of the city’s consumers could expect their electricity to be back online within 1 week, it would take as long as 6 months for the natural gas infrastructure to be fully operational. (To get back to full-scale provision of electricity would take 1 month.)

Reports from Connecticut showed that natural gas continued to flow through extreme weather, hence its focus on fuel cells and fossil fuel generation as the cornerstone of its efforts toward resilience. San Francisco is taking a different approach, focusing instead on distributed solar PV linked to advanced batteries while incorporating existing diesel generators into the solution mix.

After an extensive and interactive mapping exercise located critical facilities throughout San Francisco, sites were analyzed for available rooftop space for solar PV and the logistics of installing batteries. Projects that could be installed under existing regulatory restrictions were also prioritized. The end result is roughly a dozen projects scattered throughout the city that would offer resilience in the most sustainable manner possible using current technology. So far, funding for initial groundwork for this microgrid portfolio has come from a $1.2 million grant from the U.S. DOE’s SunShot initiative.

Emergency Response Programs Lead to Economic Opportunity

Though a common perception is that diesel generation is the most reliable backup power supply, reports from the field beg to differ, as failure rates can be extremely high. The vulnerability of San Francisco’s natural gas infrastructure also required a different approach. Given recent advances in smart inverters capable of safe islanding and the declining costs of energy storage, it appears that the San Francisco approach is not only uniquely qualified to address the unpredictability of earthquakes—but also represents a more sustainable and climate-friendly approach to community resilience.

So far, vendors such as SMA, Tesla, and Saft have been involved in the modeling of these systems to be installed in the coming years. While a program with the noble goal of emergency response, the community resilience microgrid market also represents an economic opportunity. Under a base scenario, the market is projected to reach $1.4 billion globally by 2024.


For Hospitals, a Path to Resilience

— January 27, 2015

My colleague Madeline Bergner recently wrote about efforts to reduce the greenhouse gas emissions from hospitals and other healthcare facilities.  That effort is paralleled by a movement to make these spaces less vulnerable to natural disasters and other disruptions, as well.

In December, President Obama gathered healthcare leaders to announce a set of new recommendations for making the country’s healthcare facilities more climate resilient.  Hurricane Sandy caused over $3 billion in damage to healthcare facilities alone, triggering federal attention to the issue.  At the event, the U.S. Department of Health and Human Services announced a web-based Climate Resilience Toolkit as well as a best-practices guide, “Primary Protection: Enhancing Health Care Resilience for a Changing Climate.”

The guide describes a number of issues that have caused hospitals to lose power during recent disasters.  These include reliance on local infrastructure (namely local [municipal] steam generation), aging infrastructure, and a reliance on onsite diesel generators, which are often poorly maintained and rely on limited fuel supplies.

A Holistic View

The report also cites a challenge in the approach to backup power.  Backup systems are viewed as having no value during normal operations, and therefore “are less likely to attract adequate investment and maintenance from the private sector.”  By viewing backup power as emergency-only, the hospital is viewing power in binary terms; the big diesel generator is there when you need it, and takes up space (and money) when you don’t.

A more holistic view of energy use can lead to a more resilient facility.  The report cites a number of strategies, including the use of combined heat and power, energy efficiency, and passive survivability.  This last concept drives building design and functionality so that hospitals can still function without power.  With operable windows, passive heating and cooling, and naturally ventilated spaces, these levels of resiliency can be accomplished.

Generator Hospital

Navigant Research’s reports on Grid-Tied Energy Storage present a range of technologies that can aid in power management all the time, not just during a crisis.  By viewing grid connectivity as a continuum, facilities can mitigate the effects of disasters and make money by selling power into the grid.  The resilient healthcare facility of the future may not just be one that can survive a disaster but one that provides power to the community 365 days a year.

In upstate New York, the town of Potsdam just announced a microgrid project that will connect 12 facilities using 3 MW of combined heat and power, 2 MW of solar, 2 MW of storage, and 900 kW of hydro-electric generation.  The local hospital is a key stakeholder in this project, led by Clarkson University.  Other partners include General Electric (GE) Global Research and GE Energy Consulting, National Grid, and the National Renewable Energy Laboratory.

Innovative technology is not only being deployed for the entire hospital facility.  At the Texas Scottish Rite Hospital for Children in Dallas, Texas, flywheel manufacturer Vycon installed two 300 kW flywheel systems just to power the imaging facility.  The benefits of flywheels include high reliability, power density, and overall quality, as well as the quiet nature of backup power.  While the hospital has only suffered a few power outages in recent decades, the protection of the expensive equipment from power spikes and voltage drops is of great value.


Outage Management Technology Looks to an Integrated Future

— December 30, 2014

First deployed in the 1970s, outage management systems (OMSs) were originally designed to incorporate outage notifications from external sources to create a map view of the outage and generate an optimized power restoration plan.  Today, with smart grids revolutionizing power delivery through telecommunications and automation, OMSs have evolved into something much more sophisticated.  However, it’s also become less and less clear what an OMS actually is.

Conventional OMSs understand the outage, determine the correct course of action to take, and issue switching orders for the control room operator and/or distribution management or supervisory control and data acquisition (SCADA) system.  Though these systems can be linked, each one typically maintains a separate database, meaning that no system holds a complete understanding of the network state or restoration process.  Now, vendors are combining outage management with distribution management and SCADA, creating what is often called an advanced distribution management system (ADMS).  Incorporating a single system map and database, ADMSs can manage the engineering grid with the restoration process in real time, resulting in faster, more informed action to restore power.

Real-Time Resilience

On the communications side, new OMSs may integrate real-time, two-way information from the customer call center, the interactive voice response (IVR) system, smart meters, mobile crews, and even social media.  This enables the system to update itself immediately upon the reception of outside information and exchange pertinent notifications and updates with mobile crews and customers.  Again, OMSs have traditionally not managed these different communications media; they’ve only exchanged limited information with them.  Now, due to proliferating open standards, the pace of this exchange has increased, and new platforms, such as social media, are increasingly involved.

Analytics solutions represent another game-changer for OMSs and grid resiliency/reliability efforts.  Analytics technology combines notifications, voltage readings, and outside sources, such as weather, to inform preventive maintenance efforts, increase the accuracy of damage assessment, and improve the efficiency of the restoration plan.  Analytics systems can be integrated into a combined DMS/OMS/SCADA, ADMS, or purchased as a separate overlay to enhance systems.

All Together Now

Navigant Research expects growth for standalone OMSs to decline as more utilities adopt ADMS strategies, but market demand for improved reliability and lowering outage costs will continue to drive adoption of products and services to support advanced outage management — analytics, customer engagement tools, and distribution automation. As Navigant Research’s report, Outage Management Systems, makes clear, these systems certainly aren’t what they used to be.  Not only are they more dynamic, reliable, and flexible, but they’re also used by utilities in new ways that require traditionally siloed departments that manage engineering, operations, and communications to work closely together.

Not all utilities will adopt a full ADMS solution from a single vendor—it’s likely that many will configure systems in a more integrated fashion and will move toward a combined management philosophy, where outage management is one application within a platform that manages operations, engineering, and even customer engagement during events.


Resilience: Coming Soon to a Building Near You

— August 14, 2013

Resilience – defined as “an ability to recover from or adjust easily to misfortune or change” – has long been a primary goal of the smart grid.  However, outside of data centers, which have always been optimized for physical and network resilience, this attribute rarely makes the priority list for commercial building design and operations.  A recent report by Sandia National Labs explores the drivers and obstacles for the development of resilient buildings.

One of the report’s key findings is the lack of a consensus definition of a “resilient building,” which is not surprising.  If a building is in an earthquake zone, a resilient building is one that doesn’t collapse during a major earthquake.  In addition to structural integrity, resiliency of fire and other life safety systems are also of key importance – and well understood.  But for this discussion, a resilient building is one that is designed, constructed, and operated to allow ongoing operation in the face of significant external disruptions, such as natural disasters, external system failures (i.e., power grid outages, transportation systems shutdowns, etc.), or similar threats.

Although the Sandia report was drafted before Tropical Cyclone Sandy devastated the U.S. East Coast, Sandy’s impact, especially in New York City, has focused some minds on the concept of resilient buildings.  Building designs that integrate backup power sources, tolerate flooding up to a certain level, and support other forms of infrastructure redundancy should have obvious appeal to occupiers, owners, insurers, and other stakeholders.  However, the Sandia researchers found that, as with other optional building improvements such as energy efficiency upgrades, the motivation for implementing resiliency techniques depends on demonstrably clear economic advantages.  It always comes down to the business case.

Efficiency = Resiliency

One aspect the Sandia report does not address, however, is how many emerging smart building technologies, with business cases justified by operation and/or energy savings (or regulations), might contribute resilience in commercial buildings.  Energy storage technologies, studied in the recent Navigant Research report Energy Storage in Commercial Buildings are likely key to building resilience, especially when combined with in-building microgrid technologies (discussed in another recent report, Direct Current Distribution Networks).  It stands to reason that a more efficient building, including basic envelope efficiency, HVAC and lighting systems, and potentially integrating generation sources such as solar or combined heat and power, has the potential to be more resilient in the face of external disasters.

Will resilience be a major focus for smart commercial building construction and retrofit?  Given how much time and regulatory pressure it has taken for energy efficiency to be taken seriously, I would not hold my breath, but including resiliency benefits in the business case for other smart technologies could be a savvy move.


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