Energy Storage

Falling prices and technological improvements have brought battery storage systems into direct competition with traditional distributed generation, demand response, and peaking generation resources. But making one work efficiently and profitably is not just plug and play.   Last fall, Southern California Edison (SCE) had some big decisions to make. The giant utility, which serves 14 […]

California’s burgeoning renewable generation sector, given renewed vigor with a proposed increase in its renewables mandate, means it will need robust energy storage capacity going forward, said speakers at a session at the Electric Power Conference and Exhibition April 22 in Rosemont, Ill. Much of that storage capacity may be provided by a mammoth combined […]

The U.S. energy infrastructure needs not just substantial investment for the future but also considerable rethinking about its role and functions in order to be positioned to deal with a rapidly changing energy landscape and evolving threats from cyber attack and climate change. That was the message from William F. Hederman, Jr., Department of Energy […]

Southern California Gas Co., the National Renewable Energy Laboratory (NREL), and the National Fuel Cell Research Center (NFCRC) have teamed up to launch the first power-to-gas demonstration projects in the U.S. The two facilities will be located at the NFCRC at the University of California, Irvine and at NREL headquarters in Golden, Colo. Power-to-gas technology […]

Renewable energy development company SunEdison announced on Mar. 25 that it had agreed to purchase up to 1,000 vanadium redox flow batteries totaling more than 100 MW of storage capacity from Imergy Power Systems to be used for community minigrid projects in India. SunEdison, which has an equity stake in Imergy, in January received financing […]

What turns a trend from trendy to established? In the energy industry it can be any number of things, from a technology breakthrough, to a new market, to forces of nature. The shale gas boom in the U.S. is the most well-known example of a technology trend that has changed the economics for all power […]

Here are selected thought-provoking (and even unexpected) comments made by presenters at the 10th annual MIT Energy Conference on Feb. 27 and 28 in Cambridge, Mass. Comments are summarized and paraphrased unless presented in quotes. For more on the event, see “Exelon: The Utility of the Future Views Change as Enabling, Not Disruptive” and the […]

Two developments yesterday, one quiet, one rather loud, suggest the long-predicted existential threat to the traditional utility model may be at hand. The quiet news came from the California Independent System Operator (CAISO), which reported that utility-scale solar generation crossed the 5-GW mark for the first time yesterday. Between 10 a.m. and 2 p.m. PST, […]

On Nov. 14 at Los Angeles Air Force Base, California (L.A. AFB), U.S. Air Force officials unveiled the Department of Defense’s (DOD’s) first nontactical vehicle fleet composed entirely of plug-in electric vehicles (PEVs). Actual rollout of the 42-vehicle fleet happened prior to the official ceremony, Christina Greer of the base’s Public Affairs office told POWER, […]

The Japanese Ministry of Economy, Trade, and Industry (METI) is considering a proposal for a stimulus package that would allocate ¥93 billion (about $779 million) to support installations of energy storage systems by industrial, commercial, and residential customers, as well as a variety of energy efficiency measures, according to a report in Bloomberg. The METI […]

In mid-November, members of the POWER Generating Company Advisory Team responded via email to the following set of questions. Their comments have been edited for style. POWER: What changes in your fleet’s

Said to be the largest such facility in Europe, a 6-MW/10-MWh lithium-ion battery storage project in Bedfordshire northwest of London in the U.K. officially began operations on Dec. 15. The £18.7 million Smarter Network Storage project, a collaboration between S&C Electric Europe, Samsung SDI, and Younicos, is installed at an electric substation in the town […]

The Solana Generating Station ( solana in Spanish means “sunny spot”) is built on a 1,920-acre site near Gila Bend, about an hour’s drive west of Phoenix. According to Abengoa, which owns the facility

Texas utility Oncor announced this week that it will seek regulatory approval to spend up to $5.2 billion on 5 GW of energy storage resources to firm up its grid and improve reliability. Oncor owns the state’s largest electrical grid, and it hopes to deploy distributed storage batteries across its entire system beginning in 2018. […]

Southern California Edison (SCE) signed contracts for more than 260 MW of energy storage resources on Nov. 5, among them what will be the largest grid-connected battery system in the world, a 100-MW facility supplied by AES Energy Storage. Under its mandate from the California Public Utilities Commission (CPUC), SCE was required to sign contracts […]

Just as POWER predicted in its May issue (see “The Year Energy Storage Hit Its Stride”), energy storage is starting to gain traction, not only in the U.S., but around the globe. Europe’s largest commercial battery power plant was connected to the German grid in mid-September. With a power rating of 5 MW and an […]

The energy storage sector is taking off its training wheels. And while that may be a good thing, it comes with some risks. Two senior executives in the energy storage industry who spoke to POWER at the Energy Storage North America (ESNA) conference in San Jose, Calif., Sept 30–Oct. 2, described a promising—but challenging—future. John […]

If you’re a power sector professional and you haven’t thought much about energy storage, rest assured—you will soon. At least, that’s if the numerous companies working in this field and presenting at the Energy Storage North America (ESNA) conference in San Jose, Calif., this week get their way. But, as Craig Horne, chief strategy officer […]

A coalition of four companies are proposing to build a 2.1-GW, $8 billion project that would comprise the world’s largest wind farm in Wyoming, a huge compressed-air energy storage (CAES) system in Utah, and a 525-mile transmission line that would supply up to 9.2 TWh per year of electricity to Southern California. Pathfinder Renewable Wind […]

California has set an ambitious target of connecting 1.3 GW of energy storage to the grid by 2020. In October 2013, the California Public Utilities Commission (CPUC) mandated that 200 MW of this goal come in

Speaking at the Energy Innovation Symposium in Washington D.C. on July 23, Southern Co. CEO Tom Fanning said that he would love “to announce another nuclear plant” later this year. But Fanning made it clear during his keynote address to attendees at the Bipartisan Policy Center’s American Energy Innovation Council–sponsored event that he favors an […]

At the Edison Electric Institute (EEI) annual meeting this week in Las Vegas, the tone was one of collaboration with partners from Washington to distributed generation companies. Those partnerships will be needed as the investor-owned utility (IOU) industry fights not so much a war on coal as a war for mindshare and wallet share in […]

One of the world’s first grid-scale iron-chromium redox flow batteries was interconnected this May to the distribution grid. The EnerVault Turlock, which its developer EnerVault says is a 250-kW, 1-MWh battery grid-scale energy storage system, will be charged by a 150-kW dual-axis tracking solar photovoltaic system in an almond orchard in California’s Central Valley, will […]

Anyone who follows either the energy industry or the military knows that all branches of the U.S. military have aggressive goals for renewable energy and for improving energy security and independence. Microgrids are a key part of that plan. When I wrote about military microgrids in “The Military Gets Smart Grid” back in January 2012, […]

Aside from places where microgrids have a track record—educational, industrial, and commercial campuses—commercial and community microgrids are still the domain of early adopters, but the number of people wanting to travel the trail they are blazing is increasing. A microgrid is any collection of interconnected loads and distributed energy resources within clearly defined electrical boundaries […]

If you’re looking for the easiest place to deploy microgrid technology, look at islands. That was the general consensus of presenters at the 4th Military & Commercial Microgrids Summit in Washington, D.C., held June 17-19. In addition to a presentation about a microgrid being developed for Necker Island—owned by Sir Richard Branson, founder of the […]

If, as Navigant Research suggests, the global microgrid market will exceed $40 billion annually by 2020, where is all the capacity going, and what’s fueling it (literally and figuratively)? Peter Asmus, a long-time researcher of smart grid technologies at Navigant, shared that market projection and others at the 4th Military & Commercial Microgrids Summit in […]

Thirty-two projects—most headed by universities—were awarded grants of various amounts totaling $100 million by the U.S. Department of Energy (DOE) for Energy Frontier Research Centers (EFRCs). The projects were selected from more than 200 proposals. Of the projects, 10 were new while the other 22 received renewed funding. Awards ranged from $2 million to $4 […]

Gas, wind, and solar are it for any new generation in North America for the next five to 10 years (with a few one-offs), speakers at this year’s Platts Global Power Markets conference agreed. The annual event for those involved in power project development, financing, and litigation was held in Las Vegas Apr. 7 to […]

Though often lumped together under the term “energy storage,” the field is in fact a wide range of technologies ranging from well established to speculative, each with different functions, advantages, and drawbacks. The discussion below focuses on existing grid-scale (greater than 1 MW rated power) projects and is generally ordered by level of deployment. Pumped […]