ANCHORAGE, Alaska - Two Western Alaska villages spinning power from small wind turbines say they're saving thousands of dollars a year.
"I'm still amazed at what they're doing," said Gerald Kosbruk, president of the tribal government in Perryville on the southern Alaska Peninsula.
However, the head of the largest utility in rural Alaska, Alaska Village Electric Cooperative, cautioned that such wind turbines have their drawbacks.
The tribally owned utility in Perryville installed 10 Skystream turbines last year for about $100,000, said Kosbruk.
In April last year, after the turbines had been up for 5 months, the utility crunched some numbers. The turbines had saved an estimated $9,143, he said.
And the turbines didn't operate at full power during that period.
That's because workers often switched off individual turbines to "fine-tune" them to improve their performance, he said.
In the months since, the turbines, situated behind a fence near the Pacific Ocean, have operated at full production, so the savings have likely improved, he said.
Also, the village has had a lot of wind this year, so that's likely helped too, he said.
"It's blowing pretty good out there today," he said.
Best of all, the village is no longer running out of diesel fuel for the power plant.
The village of 130 doesn't have much fuel storage, so every six months the village ran out. The utility would fly in limited quantities until the next barge arrived with a large shipment.
The fly-in fuel could cost more than $10 a gallon, three times the barged-in fuel, Kosbruk said.
The tribal government, using federal funds for tribes, considered buying the turbines for individual houses since Perryville doesn't have many. But the utility would have lost money, he said.
By making the turbines part of the utility, everyone should benefit by receiving cheaper electric costs in the long run, he said.
The small turbines were the subject of a renewable energy classes organized by the Yukon River Inter-Tribal Watershed Council in Anchorage last week. A dealer who sells them taught a group of Western Alaska villagers how to build them.
The package - with a 2.5 kilowatt turbine, three-blade propeller, steel pole and cables today costs about $11,000 to install in the Anchorage-area, said Kirk Garoutte, owner of Susitna Energy Systems and the man who helped install Perryville's turbines.
The cost would rise with rural transportation costs, he said.
They're simple to install, and within a few hours the students had bolted the turbine to a 42-foot steel pole and raised the system with a truck winch.
Students from villages like Marshall on the lower Yukon talked excitedly about how they'd like to see 10 of the Skystreams in their village, like Perryville has.
Operation limitations
The head of the largest utility in rural Alaska, Meera Kohler, said the turbines can help some villages.
But Alaska Village Electric Cooperative can allow only a limited number of individuals to operate them in villages they serve, she said.
For example, the village of Marshall, which has about 420 residents, could only have two turbines tied to AVEC's grid.
More than that, and flickering would cause problems for others, including clocks that would need resetting.
Proponents of the small wind turbines call those problems insignificant, she said.
"But people experiencing those issues come unglued," she said. "They think it's our problem."
Also, remembering rural wind turbine projects that went belly up in the 1980s, Kohler also cautioned that while the turbines look attractive on paper, unexpected maintenance and equipment costs can quickly eat up any savings.
Shaktoolik in Northwest Alaska uses two Skystream turbines to help power the corporation building in the village of 223, said Fred Sagoonick, general manager of the Native corporation.
The corporation drew on its savings to buy two Skystreams to help power the corporation's building in the village of 223.
They're saving hundreds of dollars a month at the building, which includes a grocery store and offices on the second level.
Sagoonick, an AVEC board member, worked out an agreement with AVEC that allows it to sell power to the utility for credit, he said.
It doesn't sell much, since the building consumes nearly everything the turbines produce, he said.
The turbines started spinning two years ago, but one suffered problems with the microprocessor and needed to be repaired.
For the last year, "they been running awesome," Sagoonick said.
Even with the turbines, the corporation's October electric bill was $812.
But that's roughly half of what it used to be.
Two years ago in October, without the turbines, the building used more than twice the electricity, he said.
"It will be awhile before we see payback, but it does free up a few hundreds of dollars a month to help us keep up with other bills," Sagoonick said.
Perryville is not a member of AVEC but rather has their own utility as part of a self organized native corporation. They are not therefore subject to the restrictions of AVEC policy.
The penetration rate of the wind system in Perryville is less than 20% of the total utility generating capacity and well below the threshold of the governor regulation capability of the diesel generators. Adding a kilowatt of wind power to the high voltage distribution of the village is “like” decreasing the load on the diesel generator by one kilowatt and thereby lessening the demand for fuel.
The wind turbines installed in Perryville, Shaktoolik (and elsewhere throughout Alaska) are Southwest Windpower Skystream 3.7s. They are not “one off” machines. The Skystream has been designed intentionally for inexpensive mass manufacturing and very wide scale deployment. They are well proved in tough operating environments.
Even so, occasionally problems may occur. In a situation similar to the problem that occurred in Shaktoolik, a repair part can be sent to a remote Alaskan village by US Mail- an important logistical advantage, and replaced by local help, with basic hand tools for very little time and expense. If one turbine in a group of machines has a problem, the remaining machines go on working without a severe loss of generating capacity. If a comparable single large wind turbine is doing all the work, and it fails, there is just no built in redundancy. Bigger turbines need maintenance too and they do break down occasionally. (Getting large wind turbines serviced and operational in rural Alaska has reputedly been difficult in the past.) At least multiple small wind machines are do-able. The village of Perryville did most of the work themselves by employing their own people with equipment they already own. They performed the entire construction and commissioning project and only needed some guidance with the design and integration. To their credit, the village of Perryville has succeeded with implementing wind energy into their power system by will and determination and to their benefit they will realize savings because they own the system and were willing to do the work themselves.
The problems of voltage flickering and frequency excursion (clocks that speed up and slow down) is largely attributed to common inductive type generators. They require “excitation” of the rotor field to create flux and consequently push the voltage source (grid) when transitioning in and out of generation (as the wind speeds up and slows down). The Skystream is a permanent magnet alternator, self exciting wind turbine with an inverter based power conversion process within the turbine itself. It makes very clean power as evidenced by independent UL and IEEE certification. Compared to inductive wind turbines permanent magnet alternator wind turbines can help stabilize weak grid conditions. With the Skystream wind diesel hybrid system, the diesel generator has the responsibility to maintain constant frequency (by governing engine rpms) and the inverter within the turbine matches that frequency- good or bad.
2500 watts is just a single 25 amp circuit breaker. A piece of equipment called a 'grid tie unit' or GTU is used to easily interface alternative energy to they local grid. They are not cheap - but - will handle more than just a handful of windmills.
Is it me, or, is the writter of this article just skeptical of this technology? The article is quick to bring up all the drawback of alternative energy.
In Alaska - you never use just one form of Alternative Energy. On the coastline, you would use both solar panels and wind generation. On a nice sunny day with no wind the solar panels kick in, on a cloudy windy day the windmill kicks in. The facility would have several dozen deep cycle batteries to carry over on days of no generation.
I cannot think of a single village that would not benefit from a wind farm.
I put the first solar panel on our home in 2002 and now we have 7. Today, in Dec it doesn't even generate a trickle charge - but June, July, August we get 300kw from them, and March, April, May, Sept, we get 45kw to 100kw. They will payback in 2015 and have a manufacturer's warranty of 25 years and an estimated operational life of 45 to 60 years. No moving parts.
However in remote places like these villages, especially if they generally have a steady wind, they are an excellent idea.
It looks like there are some control problems though, there is no good reason why a bunch of these things can't be connected together to feed a village or a grid, and if lights are flickering and clocks acting up there is something wrong with the system.
My CARS, including a 50 year old Studebaker, have solid enough electrical systems so lights don't flicker and the clocks run right, so there is no reason why a 21st century power system can do the same.
For some real cost savings what's wrong with an Airomotor connected to an alternator feeding batteries and inverters? Or the vertical turbines they have these days that seem to work very well?
"For example, the village of Marshall, which has about 420 residents, could only have two turbines tied to AVEC's grid.More than that, and flickering would cause problems for others, including clocks that would need resetting." That should explain why there are only a few jobs available for the operation per village.
Also "Since when was electric part of a "Traditional" life style? " was just an ignorant statement. Sagoonick comes right out and says it would free up money for other bills, which also are not traditional. Get a damned grip; its just people trying to make it, like everyone else. Why so angry?
Having to reset your clock is a terrable price to pay for power.
Having to FLY fuel in because they ran out sounds like someone needs a few math lessons on how to figure fuel useage.
(Alaska Village Electric Cooperative can allow only a limited number of individuals to operate them in villages they serve)Please explane why this is?Is someone claiming they own the wind?
Saving money with wind and solor power is an Al Gore, you save so I can spend, feel good idea. They will never replace oil/coal for producing dependable, constant power. At least not untill we get over the "nuke meltdown" mentality. Building a few dams and some nuke plants will HELP keep the cost down, but making electric will always cost money and keep going up.
Why is it the wind/solar power people always forget about maintance? Repair costs? Shipping costs? Tie in equiptment and controls? How many complants are there about "those ugly towers" and look at all the birds they are killing?
How many law suits will be filed for those UGLY thing blocking my view???
Since when was electric part of a "Traditional" life style?
bring on the rolling blackouts...
how could Amerikans live like that?
The thrown-together electric grids in a lot of villages need work to make them reliable and cheaper, no matter whether people are using wind or diesel in the future.