Quantcast
Environmental News for a Healthier Planet and Life

Help Support EcoWatch

The Grid Reliability Myth

Energy

On Aug. 1, 2011, a feral heat wave grasped Texas by its drought-parched throat. Temperatures remained over 100 degrees for 40 days—dozens of people died. Air conditioners all over the state struggled valiantly to cool buildings—much of their effort leaked out into the hot Texas sky. Then, one by one, twenty power plants–primarily natural gas peaker plants—winked out because of the temperature. The cost for a kilowatt (kWh) of electricity during the afternoon peak reached $5,000. While inland wind was also low during the heat wave, coastal breezes kicked up. Wind power barely kept the grid operator from having to black out neighborhoods. Grid operators conceded that equipment failures in such heat were to be expected. The irony here is that the power plants which failed—inefficient peakers with a high cost per kWh—are justified on the basis that they will be required only occasionally, during extreme weather—but apparently are not designed to be available in those very circumstances!

A quarter of U.S. coal fired power plants this winter are operating with less than half their necessary reserve supply of coal, making the entire national grid vulnerable in the event of a severe weather event. Photo credit: Shutterstock

Remember this episode the next time you hear—or read—that we can’t progress to 100 percent clean energy because the centralized, fossil grid is more “reliable.” Our current coal and natural gas reliant grid is anything but reliable. The Galvin Electricity Intiative led by former Motorola CEO Bob Galvin and former Edison Electric CTO Kurt Yeager, describes the grid as “Aging, unreliable, inefficient, insecure and incompatible with the needs of a digital economy … each day roughly 500,000 Americans spend at least two hours without electricity. Brownouts, power spikes and even minor blips can bring high-tech production lines to a halt. Such impurities and failures cost business and consumers an estimated $150 billion a year. Moreover, the system is vulnerable to terrorist attack, major storms and even moderately turbulent weather.”

Heat waves are not the only source of fossil power vulnerability. Only six months before the 2011 heat wave, Texas had lost 80 power plants to an ice-storm. During last year’s three day freezing U.S. polar vortex, with temperatures 20-30 degrees lower than normal, demand soared across the Midwest and East. Simultaneously, more than 35,000 megawatts of electricity capacity failed; about half was due to inadequate fuel supply, either frozen coal piles or natural gas supply shortfalls; the other half was due to equipment freezing in the severe cold. (Significant brown-outs were avoided only because of demand response management—clean power to the reliability rescue again).

Water shortages can cripple both fossil and nuclear power. In 2013 and again in 2014 coal power plants in Maharashtra, India, were shut down due to a lack of cooling water. The State of Chattisgarh had to shut down its Sipit coal plants in 2008 due to drought. In 2003 Electricite de France had to shut down a quarter of France’s nuclear power fleet because of water temperatures. In June 2014 California lost more than a gigawatt of natural gas capacity because of a drought-induced shortage of cooling water. Last August Connecticut had to shut down a nuclear plant because of water temperatures too high for cooling.

Lots of rain doesn’t help either. This July Serbia lost 45 percent of its coal production due to flooded mines. From 2010-2013 floods routinely slashed coal production in Queensland, Australia, driving up global coal prices dramatically and forcing importers like India to reduce generation and cut off consumers.

Each fossil fuel power plant sits at the end of a long supply chain; these often fail. Even the utility industry is making the argument that its natural gas powered fleet does not have access to sufficiently reliable gas pipeline capacity. A quarter of U.S. coal fired power plants this winter are operating with less than half their necessary reserve supply of coal, making the entire national grid vulnerable in the event of a severe weather event. In 2013 Pakistan experienced routine 20-22 hour black-outs and load shedding because its gas-fired power plants could not access enough fuel.

This August 55,000 megawatts of generating capacity in India were shut down due to coal supply shortage or breakdowns. Yet the U.S., Pakistan and India are among the countries with the world’s largest coal reserves.

Indeed, so unreliable is the centralized, fossil dependent grid that both its operators and customers have to overbuild generating capacity to deal with these failures. Utility systems are routinely expected to have 15 percent surplus capacity above expected maximum load to deal with outages, and often maintain more than 30 percent. A full 20 percent of the total electric load in the U.S. is backed up with on-site generators, mostly diesel, because facilities like hospitals, prisons, data centers, airports and research laboratories cannot tolerate the routine power outages that they experience from grid power.

So why (Big Carbon propaganda aside) do we keep reading about unreliability as the problem with a 100 percent clean power future? The media confuses, (and is encouraged to confuse) intermittency with unreliability. A full moon is intermittent—and so are eruptions of Old Faithful. But we would not describe either of them as “unreliable.”

Wind and solar are similarly intermittent but reliable. (Geothermal, small hydro and efficiency are neither intermittent nor unreliable.) The number of hours a year they generate at peak capacity is smaller than for a typical natural gas, coal or nuclear power plant—if that conventional plant has fuel and doesn’t break down. But that doesn’t mean we don’t know how many electrons renewables will yield each year, nor that those electrons necessarily cost more—after all, the fuel is free. Increasingly renewables have raced “grid parity” and now cost less than fossils is many markets.

And clean power is less vulnerable to equipment failures, extreme weather or disruption of fuel supply chains than coal, natural gas or nuclear. Indeed, after really extreme weather events, like Hurricane Sandy or Typhoon Hudhud, the only electric power that was available, sometimes for weeks, were pockets of renewable energy.

And electric demand is intermittent as well—with solar generating peak power at exactly the moment when air conditioning load, or irrigation pumping is the highest—so that in California solar power has eliminated the need for summer afternoon peaker plants. In Africa and India, many earnest discussions of how “unreliable” solar power is take place in grid powered meeting rooms where, during the meeting itself, power is shifted from a grid which has failed to local diesel generations. But outside those rooms solar panels on poor people’s houses continue to operate.

Reliable, but intermittent generation, like wind and solar, requires different load balancing strategies than coal power at risk from fuel disruptions, or nuclear which can break down for months or years at a time. Clean power needs short-term storage, to deal with variations in wind and solar generation from clouds or gusts, and a better connected set of wires so that as wind in West Texas dies down consumers simply draw on coastal winds which are kicking up.

But overall the reliability problems with a clean energy future will be smaller than if we keep trying to drag out our dependence on fossil fuels. The chart below—which is based on experience globally—suggests why. There are simply a lot more ways that a centralized, fossil fuel grid can let consumers down than there are with a clean energy, heavily distributed grid.

VULNERABILITY OF GENERATING TECHNOLOGIES TO DISRUPTORS

YOU MIGHT ALSO LIKE

Richard Branson and Amory Lovins Join Forces to Accelerate Clean Energy Revolution

Every 3 Minutes Solar Industry Flips Switch on New Project

Renewables Outpace Nuclear All Over the World

EcoWatch Daily Newsletter

Women walk from Santa Monica beach after a social media workout on the sand on May 12, 2020 in Santa Monica, California. Al Seib / Los Angeles Times via Getty Images

Independence Day weekend is a busy time for coastal communities as people flock to the beaches to soak up the sun during the summer holiday. This year is different. Some of the country's most popular beach destinations in Florida and California have decided to close their beaches to stop the surge in coronavirus cases.

Read More Show Less
Daily fireworks in many U.S. cities in recent weeks have no doubt been interfering with the sleep and peace of mind of thousands of veterans and others who suffer from PTSD. Flickr / CC by 2.0

By Arash Javanbakht

For some combat veterans, the Fourth of July is not a time to celebrate the independence of the country they love. Instead, the holiday is a terrifying ordeal. That's because the noise of fireworks – loud, sudden, and reminiscent of war – rocks their nervous system. Daily fireworks in many U.S. cities in recent weeks have no doubt been interfering with the sleep and peace of mind of thousands of veterans.

Read More Show Less
Koala populations across parts of Australia are on track to become extinct before 2050 unless "urgent government intervention" occurs. Mathias Appel / Flickr

Koala populations across parts of Australia are on track to become extinct before 2050 unless "urgent government intervention" occurs, warns a year-long inquiry into Australia's "most loved animal." The report published by the Parliament of New South Wales (NSW) paints a "stark and depressing snapshot" of koalas in Australia's southeastern state.

Read More Show Less
NASA is advancing tools like this supercomputer model that created this simulation of carbon dioxide in the atmosphere to better understand what will happen to Earth's climate if the land and ocean can no longer absorb nearly half of all climate-warming CO2 emissions. NASA/GSFC

By Jeff Berardelli

For the past year, some of the most up-to-date computer models from the world's top climate modeling groups have been "running hot" – projecting that global warming may be even more extreme than earlier thought. Data from some of the model runs has been confounding scientists because it challenges decades of consistent projections.

Read More Show Less
A child stands in what is left of his house in Utuado, Puerto Rico, which was almost completely destroyed by Hurricane Maria, on Oct. 12, 2017. U.S. Coast Guard Petty Officer 1st Class Jon-Paul Rios. Flickr, CC by 2.0
By Mark Hertsgaard and Kyle Pope

To hear many journalists tell it, the spring of 2020 has brought a series of extraordinary revelations. Look at what the nation has learned: That our health-care system was not remotely up to the challenge of a deadly pandemic. That our economic safety net was largely nonexistent. That our vulnerability to disease and death was directly tied to our race and where we live. That our political leadership sowed misinformation that left people dead. That systemic racism and the killing of Black people by police is undiminished, despite decades of protest and so many Black lives lost.
Read More Show Less
President Trump's claim last September that Hurricane Dorian was headed for Alabama's gulf coast was quickly refuted by employees at the National Oceanic and Atmospheric Administration (NOAA). An independent investigation found that NOAA's chief violated the agency's ethics when he backed Trump's warning and doctored map that used a Sharpie to alter the storm's path, as EcoWatch reported.
Read More Show Less

Trending

African bush elephants in the Makgadikgadi Pans Game Reserve in Botswana on Nov. 22, 2016. Michael Jansen / Flickr

More than 350 elephants have died in Botswana since May, and no one knows why.

Read More Show Less