Weathering the Storm: Microgrid Technology Will Help Utilities Keep the Lights On

by GE Reports
Infrastructure - Oct 27 2017 - 4 min read
Planning for grid resiliency could help regions devastated by storms recover faster.

As Hurricane Harvey drenched the Texas coast in August—and Irma devastated the Caribbean and soaked Florida in early September—the media was filled with scenes of flooded streets and gymnasiums crowded with people seeking shelter.

But those harrowing images represent just a glimpse of the economic devastation that Texas Gov. Greg Abbott warns is likely to linger for years to come. “We need to recognize it will be a new normal, a new and different normal for this entire region,” he said.

If earlier disasters are any indication, a key to these regions’ recovery may lie in how soon they are able to restore electricity to the millions of people who lost it. In the case of Hurricane Sandy in 2012, New York’s innundation with salt water knocked out power across New York City and and in many seaside towns, slowed down recovery efforts, and made it impossible for many people hit by the storm to return to their normal lives—and their jobs. According to some estimates, power and other infrastructure failures may have more than doubled Sandy’s long-term economic losses.

Microgrids could increase the efficiency of existing electrical infrastructure by modernizing how energy is produced and utilized at the location.

Part of the problem is the way that most regions plan for disasters. Traditional planning tends to focus on recovery—solving the problems caused by a disaster, like sheltering displaced people or fixing failed power grids. By comparison, grid resiliency, an emerging trend in preparedness, works to create infrastructure that will continue to function in the face of disaster or that can recover quickly.

Eliot Assimakopoulos, microgrid sales leader at GE Grid Solutions, calls this approach “master resiliency planning.” In the case of the electrical system, one option is self-healing grids, which identify failing sections of the power network, isolate them, and reroute power from other parts. Beginning in 2004, GE deployed one such solution for NSTAR, an electrical utility in the Boston area and in central, southern, and southeastern Massachusetts, a region that often experiences weather-related power outages. Using thousands of sensors and “smart switches” to monitor the system and redirect electricity to where it’s needed, the solution was designed to minimize outages and—in case they do occur—minimize their duration.

Its effectiveness was apparent during tropical storm Irene in 2011: NSTAR’s system had 506,000 power interruptions, almost half of which were fixed in less than an hour. “On average, it took utilities about a week to restore service after Irene, but NSTAR was able to substantially restore power within three days in a large portion of their electrical network,” Assimakopoulos says. During Sandy, NSTAR’s network was again tested in Massachusetts, and again it proved itself: While 400,000 of its customers experienced power outages, 274,000 were restored within a day.

Climate change will bring stronger and less predictable weather events, which makes minimizing power outages a priority.

This technology, which GE calls Distribution Automation, focuses on large systems and the way they distribute power. But other resilient grid designs, such as microgrids, work from the opposite direction. Microgrids are smaller power systems that can integrate with the grid or work independently in campus or community environments. In 2016, GE partnered with Ameresco Inc. and installed a microgrid system at the Portsmouth Naval Shipyard in Kittery, Maine. Using a 500kW battery, a 4MW backup generator, and a 10MW combined heat and power plant, the design was able to maintain uninterrupted critical operations at the shipyard in the event of a grid failure.

The company also helped to develop a microgrid feasibility plan for 11 cities in New York state as part of the New York Prize program hosted by the New York State Energy Research and Development Authority (NYSERDA). One of these communities was the Hunts Point market in the Bronx. Home to one of the largest food-distribution centers in the world, Hunts Point is the gate where 60 percent of New York City’s food—including half of the region’s meat—comes into the city. While it emerged largely unscathed from Hurricane Sandy, the storm was in many ways a wake-up call: Had electricity to the market been cut off, tons of food would have been spoiled, food distribution in the region would have been crippled, and tens of millions might have gone hungry. With a microgrid, Hunts Point could continue operations, even in the face of a massive power outage.

The microgrid plan also offers an opportunity to increase the efficiency of existing electrical infrastructure by modernizing how energy is produced and utilized at the location. This is in line with GE’s Ecomagination strategy to enhance industry’s productivity while reducing its environmental impact. “Their current electrical utilization is very inefficient,” Assimakopoulos says. “The plan we helped develop would make it far more efficient—and sustainable.”

The goal of resilience planning is to keep cities running even during catastrophic events.

By locating efficient on-site generation and creating a microgrid there, the opportunity also exists to extend the microgrid into the local community, including the housing complex near Hunts Point, thus providing resiliency to neighbors in the event of a blackout.

In April, NYSERDA approved 11 feasibility plans for Stage 2 of its NY Prize program, four of which GE will be supporting. They involve developing a far more detailed design for the proposed microgrid. NY Prize Stage 2 will be completed in summer 2018, and the final winners will be selected later that year.

Ultimately, resilience is aimed at helping an area maintain business as usual, even during potentially catastrophic times. “For us, it’s about creating an intelligent network that has ability to recover quickly from these types of situations,” Assimakopoulos says.

More Like This

Success!

You’re in.

Get smart on the future of making things.

Subscribe to our newsletter.
By signing up, I acknowledge the Autodesk Privacy Statement.