Featured Research

from universities, journals, and other organizations

Wind Power Need Not Be Backed Up By An Equal Amount Of Reserve Power

Date:
December 8, 2007
Source:
Technical Research Centre of Finland
Summary:
Wind power need not be backed up by an equal amount of reserve power, according to new research. The production of wind power varies and is harder to forecast than the fluctuations in electricity demand. Adding large quantities of wind power to power systems is therefore challenging. The power system impacts of wind power were studied in depth. The results indicate that the frequently stated claim of wind power requiring an equal amount of reserve power for back-up is not correct.

Wind power need not be backed up by an equal amount of reserve power.

Related Articles


The production of wind power varies and is harder to forecast than the fluctuations in electricity demand. Adding large quantities of wind power to power systems is therefore challenging. The power system impacts of wind power were studied in international collaboration coordinated by VTT Technical Research Centre of Finland. The results indicate that the frequently stated claim of wind power requiring an equal amount of reserve power for back-up is not correct. A substantial adjustment tolerance is already built in to our power network, and the impacts of wind power fluctuations can be further balanced through a variety of measures.

The collaboration within the International Energy Agency (IEA) Implementing Agreement for Wind Energy, coordinated by VTT, has resulted in the publication of the first state-of-the-art report assessing the international experience gained on the system impacts of wind power.

The impact of a large share of wind power can be controlled by appropriate grid connection requirements, extension and enforcement of transmission networks as well as integration of wind power production and production forecasts into system and market operation. The state-of-the-art report presents the assessments of the impact of wind power on the reliability and costs of the power system conducted in different countries.

The assessments performed in different countries are often based on substantially different assumptions. Comparison of the studies showed that in particular the assumptions concerning the use of international transmission connections and the time scale of updating wind power forecasts had a major impact on the results.

The aggregation benefits of a power system covering a large area help in reducing wind power fluctuations and improve predictability. A large power system also has a larger amount of generation reserves available, and the increased regulation effort can be implemented cost-effectively. The transmission capacity between areas is crucial for the utilisation of the benefits arising from large production areas. An electricity market in which production forecasts can be updated a few hours ahead also helps in keeping down the forecast errors and thereby the costs of balance power.

The report contains a summary of the wind power impact assessments performed in 11 countries. The assessments are divided into three categories:

  1. Additional costs arising from the balancing of wind power fluctuations
  2. Grid reinforcement needs due to wind power
  3. Capacity of wind power to replace other power plant capacity

With wind power penetrations amounting to 10–20% of the gross electricity demand, the additional costs (per MWh of wind power) arising from the balancing of wind power fluctuations are estimated to range between1–4 €/MWh. This is less than 10% of the long-term market value of electricity.

Current wind power technology makes it possible for wind power plants to support the grid in the event of faults such as significant voltage drops and to participate in voltage regulation. Wind power plants are also able to limit their production fluctuations. The grid reinforcement needs due to wind power vary in different countries depending on how far from the consumption centres the wind power plants are constructed and how strong the existing national grid is.

Even though wind power is mainly an energy resource that replaces fossil power generation, it can also be used for replacing existing power plant capacity. In areas where wind power production is high during peak demand, wind power can replace other capacity by up to 40% of the installed wind power capacity. However, when a larger share, more than 30%, of electricity is produced by wind power and in areas where the wind power production is low during peak demand, wind power can only replace other capacity by 5–10% of the wind power capacity.

Publication: Design and operation of power systems with large amounts of wind power. Available from link below.


Story Source:

The above story is based on materials provided by Technical Research Centre of Finland. Note: Materials may be edited for content and length.


Cite This Page:

Technical Research Centre of Finland. "Wind Power Need Not Be Backed Up By An Equal Amount Of Reserve Power." ScienceDaily. ScienceDaily, 8 December 2007. <www.sciencedaily.com/releases/2007/12/071207000819.htm>.
Technical Research Centre of Finland. (2007, December 8). Wind Power Need Not Be Backed Up By An Equal Amount Of Reserve Power. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2007/12/071207000819.htm
Technical Research Centre of Finland. "Wind Power Need Not Be Backed Up By An Equal Amount Of Reserve Power." ScienceDaily. www.sciencedaily.com/releases/2007/12/071207000819.htm (accessed October 30, 2014).

Share This



More Earth & Climate News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Mudslide in Sri Lanka Buries Houses

Deadly Mudslide in Sri Lanka Buries Houses

AP (Oct. 29, 2014) A mudslide triggered by monsoon rains buried scores of workers' houses at a tea plantation in central Sri Lanka on Wednesday, killing at least 10 people and leaving more than 250 missing, an official said. (Oct. 29) Video provided by AP
Powered by NewsLook.com
Galapagos Tortoises Bounce Back, But Ecosystem Lags

Galapagos Tortoises Bounce Back, But Ecosystem Lags

Newsy (Oct. 29, 2014) The Galapagos tortoise has made a stupendous recovery from the brink of extinction to a population of more than 1,000. But it still faces threats. Video provided by Newsy
Powered by NewsLook.com
Saharan Solar Project to Power Europe

Saharan Solar Project to Power Europe

Reuters - Business Video Online (Oct. 29, 2014) A solar energy project in the Tunisian Sahara aims to generate enough clean energy by 2018 to power two million European homes. Matt Stock reports. Video provided by Reuters
Powered by NewsLook.com
Obama: The US Will Not 'run and Hide' From Ebola

Obama: The US Will Not 'run and Hide' From Ebola

AP (Oct. 29, 2014) Surrounded by health care workers in the White House East Room, President Barack Obama said the U.S. will likely see additional Ebola cases in the weeks ahead. But he said the nation can't seal itself off in the fight against the disease. (Oct. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins