Tag: wind power

The Dalles Dam on the Columbia River-cm

California Blackouts Show the Need for Reliable Hydropower

By Rachel Dawson

Recent blackouts in California have demonstrated the need for reliable and affordable power. Contributing to these blackouts were sudden drops in solar and wind power, as well as unavailable spare electricity from neighboring states who were also experiencing extreme heat.

To keep blackouts at bay, our region needs to continue investing in reliable power resources, such as carbon-free hydropower which makes up 45% of electricity used in Oregon.

Unfortunately, hydropower continues to come under attack by proponents of “renewable” energy sources other than hydro. Oregon Governor Kate Brown has supported removing, or breaching, the Lower Snake River Dams operated by Bonneville Power Administration (BPA) in a letter sent to Washington’s Governor Inslee. However, the recently released Columbia River System Operations Environmental Impact Statement (EIS) shows that breaching the dams will put us one step closer to facing our own blackout.

The EIS studied how operating the Columbia and Snake River dams will affect factors like fish populations, power supply, and greenhouse gas (GHG) emissions. The preferred alternative would not breach the dams and instead would utilize a flexible spill operation for fish passage that would spill more water at times when hydropower is not valuable to meeting demand. Under this alternative, Snake River chinook and steelhead are both expected to improve their smolt-to-adult return ratio.

Increasing fish populations is the primary reason environmental groups want to breach the dams. However, billions of dollars have already been invested in safety features to improve fish populations. According to NOAA Fisheries, we are now “close to achieving, or have already achieved, the juvenile dam passage survival objective of 96 percent for yearling Chinook salmon and steelhead migrants;” and the average number of salmon “passing Lower Granite Dam over the last ten years was the highest total of the last five decades.”

Peter Kareiva, the director of UCLA Institute of the Environment and Sustainability, has stated that while the “dams have caused salmon declines…the operators of the dams have spent billions of dollars to improve the safety of their dams for salmon, and it is not certain the dams now cause higher mortality than would arise in a free-flowing river.”

By increasing the number of “spills” in the preferred alternative, hydropower generation on the river would decrease by 210 aMW with average water supply. This is estimated to raise electricity rates by 2.7% and increase GHG emissions by around 1.5%.

It is vital that we protect Oregon’s hydropower supply, especially now when other baseload resources like coal are increasingly being retired. Unlike solar and wind, hydroelectric dams produce power at all times of the day, making hydropower a great baseload power source for our region.

If hydropower is reduced, we will need another baseload source to fill the gap it leaves behind. Typically, that role falls on natural gas or coal, explaining why GHG emissions are expected to rise if BPA decreases hydropower output in the future.

According to the Columbia River System Operations EIS, energy alternatives that include breaching the dams will increase both BPA’s wholesale power rates and the risk of power outages.

For example, breaching four lower Snake River dams would decrease hydropower generation by around 1,100 aMW of power. This would double the region’s risk of blackouts, increase wholesale power rates by up to 9.6%, and increase power related GHG emissions by up to 9% if the dams are replaced by natural gas plants. Replacing the dams with other renewable sources paired with batteries is estimated to cost $800 million every year, resulting in a 25% increase in ratepayer bills.

Oregon isn’t immune to threats of blackouts. Officials warn we may face a capacity deficit of thousands of megawatts due to planned coal plant closures, which may result in both extreme price volatility and blackouts by the mid-2020s. PGE is closing Oregon’s only coal plant in five months and will be relying on hydropower contracts to make up the difference at a time when our own Governor’s stance is using less hydropower. The power provided by BPA’s dams is vital if we want to avoid the power shortages experienced by California. Governor Brown should rescind her previous statement and support the continued use of the Snake River hydroelectric dams.

Rachel Dawson is a Policy Analyst at the Portland-based Cascade Policy Institute, Oregon’s free market public policy research organization. She can be reached at rachel@cascadepolicy.org

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Think TriMet’s New Electric Buses Run on Wind Power? Think Again.

By Rachel Dawson

TriMet unveiled five new battery-electric buses (BEBs) in April 2019, the sides of which all donned images of windmills and sweeping gusts of wind. The BEBs each cost around $1 million, nearly twice as much as a traditional diesel bus. And these buses are just the beginning: The TriMet board voted last year to replace the entire fleet with battery-electric buses for $1.18 billion by 2040, a $500 million premium over a diesel fleet.

TriMet has been hailed an environmental hero for “riding the winds of change.” TriMet Spokesperson Roberta Altstadt claimed that TriMet was the first in the United States to “operate an electric bus on 100% renewable energy.” Without further research, it would be easy to think that TriMet’s new buses ran on clean wind energy. And that is exactly what TriMet is hoping you would think. But you would be wrong.

If the buses don’t run on 100% wind power, how is TriMet able to get away with saying they do?

TriMet spends $228.75 per month on what are known as renewable energy certificates (RECs) from PGE. RECs are a tradable commodity sold by renewable energy facilities (such as wind farms) to the wholesale market, that purport to represent the “environmental amenities” of certain renewable energy projects. By purchasing the RECs, TriMet has bought the legal right to claim it is using renewable energy; however, the agency has not purchased any energy itself.

This would be like my paying someone else to exercise at the gym for me, and then telling my family and friends I go to the gym. The person I pay reaps both financial and physical benefits while I merely get to pretend I have them.

Supporters of RECs claim the certificates offset fossil fuels and pay for the generation of new renewable energy. However, these claims are not entirely accurate. According to Daniel Press, a Professor of Environmental Studies at UC Santa Cruz, “RECs do little to reduce emissions in the real world because they have become too cheap to shift energy markets or incentivize businesses to build new turbines.” The income generated from RECs does not come close to the millions needed to construct more wind turbines, which means that RECs themselves don’t offset fossil fuels.

Despite its claims, it would be impossible for TriMet to run on 100% wind power unless it disconnected from the regional mixed grid and hooked up to its own personal wind farm. Even then, TriMet would be forced to rely on other backup power sources due to the volatility of wind generation.

While a wind turbine may be available to produce energy around 90% of the time, the average wind farm in the United States in 2018 had a capacity factor of only 37.4%. The capacity factor refers to the amount of energy produced in a year as a fraction of the farm’s maximum capacity. Wind farms produce electricity when winds reach about nine miles per hour and stop at roughly 55 mph to prevent equipment damage. If the wind isn’t blowing (or isn’t blowing strongly enough), little to no power can be generated.

This poses problems, as the electrical grid requires constant equilibrium or blackouts will result—power supply must meet energy demand. Every megawatt of wind power has to be backed up by an equal amount of traditional, “non-green” sources like coal and natural gas to account for times when wind energy isn’t generated. This would be like keeping a car constantly running at home in case the one you’re driving on the road fails.

Instead of a wind farm, TriMet receives its electricity from Portland General Electric, the same mixed grid your home is likely powered by. In 2020, this mixed grid will be made up of 37% natural gas, 28% coal, 18% hydro, 15% renewables, and 2% purchased power (power purchased on the wholesale market). Since wind only makes up a portion of renewables used by PGE, less than 15% of the electricity used by the “wind” buses is powered by wind. A greater percentage of the electricity used by TriMet’s BEBs comes from coal plants than wind farms.

If TriMet were honest with its riders, it would replace the windmills on the sides of the new buses with coal, natural gas, and hydroelectric power plants. In the name of accuracy, TriMet could place a windmill in the corner, demonstrating the small percentage of power generated by wind farms.

So instead of riding the “winds of change,” keep in mind that you’re just riding a really expensive bus.

Rachel Dawson is a Policy Analyst at Cascade Policy Institute, Oregon’s free market public policy research organization.

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