The aim of the research project EWiNo has been to examine the use of new technologies for the improvement of wind modeling and optimization of wind farms in complex terrain. Under the management of the Fraunhofer Institute for Wind Energy Systems IWES, ENERTRAG, GEO-NET, and other well-known industrial partners are working together to put new ideas and research approaches into practice with the aim of not only being able to harness wind energy in the North in the future.
Bremerhaven/Hanover/Dauerthal, April 21, 2020 | The new generations of wind turbines make it possible to use sites in uplands and forests, which would previously have been impossible to develop for economic wind farm operation. However, along with the ever-larger rotors, the growing hub heights, and the complex flow conditions over forests, mountains, and valleys, the forecasting of energy yields is also becoming increasingly challenging.
Simple linear models like those developed and deployed in the early days are no longer suitable for accommodating complex wind conditions and satisfying the high demands on precision – sophisticated and computationally intensive 3D models have long since become the standard. To enhance the accuracy of these models even further, in cooperation with ENERTRAG, one of the leading project developers, the experienced wind experts at GEO-NET, and other well-known industrial partners from the wind sector, Fraunhofer IWES was conducting the EWiNo project (Development of a two-stage procedure for assessing the wind potential of wind locations as per the German Renewable Energy Act (EEG) amendment 2017). The project is being funded by the Federal Ministry for Economic Affairs and Energy on the basis of a decision by the German Bundestag (FKZ 0324225 A/B).
When planning a wind farm, the wind conditions are measured using a LiDAR device or measuring mast, which record the wind speed and direction at one location in the farm. A model is then used to transpose the wind conditions from this location to the actual sites of the turbines in the farm.
This project also employs a new technology to record the accuracy of this process more effectively and to improve the models even further. The use of a scanning LiDAR system allows measurement of the wind conditions at virtually any location in a wind farm. These measurements can subsequently be used to validate various 3D models such as FITNAH-3D and OpenFOAM, including under difficult conditions in forests and in complex terrain, so as to optimize the models. Furthermore, methods were developed to allow the measurements recorded with such scanning LiDAR devices to be employed in normal wind farm planning too. As an operator of numerous wind farms, primarily on lowlands, ENERTRAG is also planning wind farms in the complex terrain of German uplands. ENERTRAG has provided a development site in North Hesse for the purpose of the EWiNo project. This site offers ideal research conditions for the use of the scanning LiDAR technology.
The results will help to render yield forecasts more precise, including in forests and on complex terrain, and will thereby facilitate the planning of wind farms under such conditions in order, ultimately, to make their subsequent operation more efficient. As such, this project is making a further contribution to the success of the energy transition.
Fraunhofer Institute for Wind Energy Systems IWES • Dr. Julia Gottschall • Senior Scientist • Am Seedeich 45 • 27572 Bremerhaven, Germany • Telephone: +49 471 14290 354 • www.iwes.fraunhofer.de
GEO-NET Umweltconsulting GmbH • Johannes Becker • Authorized Officer, International Projects, Wind Measurements • Große Pfahlstraße 5a • 30161 Hanover, Germany • Tel.: +49 511 3887200 • www.geo-net.de
ENERTRAG AG • Dr. Nadine Haase • Head of Department for Communication and Marketing • Tel.: +49 39854 6459368 • nadine.haase(at)enertrag.com
Our colleague Vera Vanieva was invited to give a lecture about our long term experience in the Russian wind market at the international forum for wind energy - RAWI Forum 2020 in Moscow. 19.02.2020
GEO-NET presents its subsidiary GEO-NET South Africa (PTY) Ltd. at WINDABA 2019 in Cape Town.
Johannes Becker and Johannes Lange present the services and experience for the South African market. GEO-NET is activ in South Africa as well as in other african countries (East Africa). The services of GEO-NET cover wind mappings, design and conduction of wind measurement campaings and energy yield assessment.
GEO-NET's Johannes Lange is in Tashkent to attend Energy Week Uzbekistan 2019 (https://uzenergyweek.com).
GEO-NET developed the countrywide wind atlas for Uzbekistan in 2015 and performed wind mappings and measurements for two regions with favourable wind potential. Now, GEO-NET offers its service to support the development of wind energy in the country.
Many GEO-NET employees and both CEOs were there when almost 30,000 people showed their displeasure at the government's climate policy during the Fridays for Future Star March in Hanover.
Since there was still no major breakthrough in the field of wind energy, we will probably have to demonstrate soon again!
At the HUSUM Wind 2019, GEO-NET had some several news to present: LiDAR verifications on our own 184 m mast from 2020 onwards for the verification of LiDAR and SoDAR devices as well as two new offices in Cape Town and Kiev.
GEO-NET visited the DACH 2019 from 18th to 22nd March. The DACH Conference is the joint triennial conference of the German, Austrian and Swiss meteorological societies with many interesting contributions from different fields of meteorology. In the session "Measuring and Observing" Dr. Linda Voß gave a lecture on "LiDAR correction in complex terrain by means of FITNAH-3D" and received a lot of positive feedback on the investigations carried out at GEO-NET.
We are very happy to participate again in the Wind Power Russia 2019 conference tomorrow and we are looking forward to interesting discussions! You can meet my colleagues Vera Vanieva and Johannes Becker from 26-28 February in Moskow. GEO-NET has already managed 15 wind energy projects in Russia with wind measurement campaigns and bankable energy yield assessments.
GEO-NET won a tender for wind resource assessment for up to 800MW of wind energy in South Africa and up to 140MW in Ghana.
Part of the services is the optimal placement of 8 wind measurements as well as their compliant construction, documentation and evaluation. At the end of the measurement campaigns, GEO-NET provides bankable reports, which serve as the basis for the wind farm financing. For modeling the wind conditions in the wind farm, GEO-NET uses the validated flow model FITNAH-3D, with which wind conditions can be modeled much more accurately even in complex terrain than with standard models widely used for energy yield assessments. The client is the project developer Enertrag South Africa. GEO-NET has already carried out numerous successful bankable measurement campaigns and wind analyzes in Germany and abroad for Enertrag.
In addition to more than 30 projects in France, GEO-NET has again been able to win new projects in the Ardennes and Brittany. Thus GEO-NET is further expanding its experience in the Franch wind energy market and can score points as a competent partner for wind and energy yield assessments as well as wind measurements with masts or LiDAR.
Sergei Roife and Johannes Lange visited the Ukrainian Energy Week in Kiev. Their conclusion is quite positive: despite the strained foreign policy situation and the announced introduction of an auction system instead of a fixed feed-in tariff, the Ukrainian wind industry is optimistic about the future. This is also pleasing to GEO-NET - the wind experts from Hanover have been active in the Ukraine since 2008 and are among the most experienced wind experts in this country.
From 5 to 9 November 2018 an AHK business trip will take place in Ho-Chi-Minh-City. GEO-NET will participate at the event and will present the company and its services at the conference on 06.11.2018. The potential for wind energy is high in Vietnam. In addition, the government is pushing for expansion and has decided to increase the feed-in tariff for onshore wind energy from USD 7.8 cents/kwh to USD 8.5 cents/kwh from 1 November 2018.
Thank you very much for visiting us at Wind Energy Hamburg 2018!
- and the versatil conversations about our extensive service portfolio for Germany and the global market. There was a lot of interest for wind measurement campaigns with LiDAR or mast, bankable wind reports according to TR6 rev10, wind potential studies or wind atlases for large regions in new markets this time.
GEO-NET also has experience in supporting wind farm projects in more than 50 countries and also supports you with employees in the Ukraine, Brazil and Vietnam.
GEO-NET has signed a contract for 10 wind measurement campaigns in Russia with the Russian project developer Vetro SGC.
Based on these measurements, a total of 260 MW wind energy will be developed. This wind measurement campaign contract is already the second one with Vetro SGC, with now a total of 610 MW of wind energy planned.
Russia is thus becoming an important wind energy market. Rosatom, the Federal Agency for Atomic Energy of Russia, has recognized the signs of the times and is involved with the subsidiary Vetro SGC in the development of wind farms in order to gain know-how and open up a promising new wind market. With GEO-NET Vetro SGC has found a reliable partner for site assessment and wind measurement, who already has with its Russian-speaking staff many years of experience in Eastern Europe and worldwide.
GEO-NET has just commissioned another wind met mast in Ukraine. The latest one at a highly symbolic location for renewable energies – Tchernobyl.
We were also present at the First International New Energy Forum in Kiev.
On May 16, 2018, GEO-NET presented its services to an interested audience at the event "Wind Power Russia 2018" in Ulyanovsk, Russia.
The first Wind Park has already been built in the region and another 200 MW are planned. GEO-NET is Russia's market-leading partner for measurement campaigns and wind and energy yield assessments.