The power of wind energy and how to use it

Wind offers an immense, never-ending source of energy that can be successfully harnessed to power all of the things that currently draw energy from nonrenewable resources. But wind frequency varies with weather patterns.

Researchers from North China Electric Power University and North China University of Science and Technology recently developed a model to help predict wind frequency and potential contributions to more traditional sources. The scientists published their paper in IEEE/CAA Journal of Automatica Sinica (JAS).

"Reliable load frequency control is crucial to the operation and design of modern systems," wrote Yi Zhang, a doctoral student at the North China Electric Power University and an author on the paper. "Due to the randomness and intermittence of , the controllability and availability of wind power significantly differs from conventional power generation."

Their method is based on "," wherein checkpoints across a power grid can exchange information and adjust accordingly. The researchers decentralized this model, so that a problem in one area could be solved to benefit the entire grid. The computer algorithm predicts the variables that influence the grid (like supply and demand) and applies those constraints for any problem that any part of the system might encounter.

A traditionally controlled grid could, for example, redirect otherwise unused energy from sleeping citizens to a power-hungry hospital or some other entity that continues to require energy even during typical low-load times. In a decentralized system, like the one modeled by Zhang and her colleagues, the system works the same way, but instead of having to clear the redirection with every checkpoint, the variables are assumed and the action is nearly immediate.

To test their algorithm, the researchers compared the volume output and dependability of a four-part system—four plants sharing responsibility for generating power in different areas—with and without the incorporation of wind power.

In the analysis of a conventional power plant, the researchers found that their model required much less computational time compared to the traditional model predictive control. That's a major advantage, as the computing process is expensive in both time and energy.

When the researchers added the hard-to-predict wind turbines as a source of in the , it still worked. According to the scientists, the major flaw is that computational needs will increase to maintain system stability, which cannot be guaranteed in their algorithm.

"Our future work is focused on [pursuing] the implementation of [our algorithm] with guaranteeing stability and feasibility while reducing the computation and communication requirements," Zhang wrote.


Explore further

Chinese researchers develop algorithms for smart energy grid

More information: Yi Zhang et al, Distributed model predictive load frequency control of multi-area power system with DFIGs, IEEE/CAA Journal of Automatica Sinica (2017). DOI: 10.1109/JAS.2017.7510346
Provided by Chinese Association of Automation
Citation: The power of wind energy and how to use it (2017, January 26) retrieved 25 August 2019 from https://phys.org/news/2017-01-power-energy.html
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Jan 27, 2017
With a little storage, many of these problems go away. A project in Hawaii has PV plus storage for an island at 11 cents/kWh.

Beat that with Hinkley or Vogtle or Diablo Canyon or Indian Point.

Jan 27, 2017
Eleven cents/kWh is less than off-peak power in the lowest tier from the power company here in California. AT 23:00 my cost goes down to 12 cents until 07:00.

Fortunately, mine is provided by the PV panels on the roof during the daytime, which backs up the meter and "stores" the excess for use later.

Jan 27, 2017
the excess for use later

Uh huh.
Now lie and deflect instead of telling us how much you store and then use later at night to charge your EV.

Jan 27, 2017
11 cents/kWh
11¢/kWh? but it has been told us that solar/wind is 2¢/kWh.
Conclusion: "greenie lie machines" never stop.
With a little storage, many of these problems go away.
and never ... never stop...
Fortunately, mine is provided by the PV panels on the roof during the daytime, which backs up the meter and "stores" the excess for use later.


Jan 27, 2017
That is 24-hour power, made by PV and stored in batteries for nighttime use.

Utility-grade power, with no waste, no danger, no fuel cost, . . for eleven cents!!

Try that at Hinkley or Vogtle.

Jan 30, 2017
. . for eleven cents!!
"Rooftop Solar: Too Expensive to Meter"
"28 cents/kWh for rooftop solar power, ignoring any maintenance costs over the 20 years"
"The power company normally buys its electricity for about 5 cents/kWh from nuclear ... and even cheaper from natural gas turbine plants."
"producing electricity with rooftop solar panels is uncompetitive. It's too expensive to meter and sell."
"Much of the federal subsidies are hidden costs, in the form of income tax credits"
http://www.theene...to-meter
with no waste
solar cells with dangerous chemical carcinogenic and arsenide worse than asbestos.
https://pbs.twimg...pg:large
http://www.thebla...6-PM.png

Jan 30, 2017
How much was the power from Fukushima, Willie?

First, you have to include the $190,000,000,000 they project to cost to "clean up" the disasters,and the best engineers they will tie up for 40 years - two generations of workers and engineers and managers.

You always include nuke propaganda, as if we would read it. I usually mention real facts, not familiar with the alternative variety used by conservatives.

It will just take one more nuclear disaster before The People of the World stop it.

Jan 30, 2017
I usually mention real facts, not familiar with the alternative variety used by conservatives
What, like the one where Pu is raining down on idaho? You make up lies and then lie about your education and experience in order to justify them.

Just doing my dooty georgie.

Jan 30, 2017
"Just doing my dooty georgie."
----------------------------------

Yes, . . well next time do it on your own lawn.

Feb 03, 2017
Eleven cents/kWh is less than off-peak power in the lowest tier from the power company here in California. AT 23:00 my cost goes down to 12 cents until 07:00.


You're confusing producer prices with retail prices.

CAISO power sells for approximately 5.5 cents a kWh entering the grid. The grid utility adds transmission and infrastructure cost, administrative cost + profit on that.
That turns it into the 12+ cents/kWh you actually pay.
http://www.caiso....aps.aspx

That applies to the 11 cents/kWh after storage in Hawaii as well - that's the producer price. You don't get away with just 11 cents at the plug. The baseline cost is double that of California. That is NOT cheap.

Feb 03, 2017
Cheaper than oil, cheaper than Vogtle, cheaper than Hinkley.

It's progress, son.

Feb 03, 2017
Cheaper than oil ...
"Repeating a lie doesn't make it true"


Feb 03, 2017
Here is the power of antinuclear fearmongers, a power based on ignorance and dishonesty:
http://earthjay.c...ance.png
https://pbs.twimg...cEIi.jpg

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