In the EWiNo research project, the use of new technologies to improve wind modeling and the optimization of wind farms in complex terrain was successfully developed under the leadership of the Fraunhofer Institute for Wind Energy Systems IWES in cooperation with GEO-NET Umweltconsulting GmbH and other renowned partners from the wind industry.
The methods and research approaches developed in the research project are now being further developed for use at alpine sites in cooperation with GEO-NET, Fraunhofer IWES and Windsfeld GmbH. The often very complex flow conditions in the mountains lead to special challenges for project developers, since locations with unfavorable and locations with very good wind conditions are often very close to each other.
In order to validate and further optimize the accuracy of the flow models under these conditions, Fraunhofer IWES, in collaboration with Windsfeld GmbH and the wind experts from GEO-NET, is conducting practical research at the Windsfeld site in Salzburg, using a so-called 'scanning lidar' measuring device. This device is used to measure the wind conditions at almost every point in the planned wind farm area. Using the measurement results and flow models such as FITNAH-3D, which have been specially optimized for this procedure, it is then possible to directly compare the measurement and model results, which significantly reduces the uncertainty.
The very challenging alpine location of Windsfeld, where planning is carried out with turbines that are commonly available on the market, requires an innovative approach to project development. As new standards are set for the development of alpine sites in the course of the project realization, Windsfeld GmbH has set itself the goal of combining various innovative concepts along the wind energy value chain in the project.
The focus here is in particular on the validation and adaptation of the latest technologies for bird detection, the survey and strategic treatment of the topic "icing on site" as well as the energetic densification of the wind farm. In the context of park densification, a process that is seen as an essential component for wind power in the alpine region from both an ecological and economic point of view, there are innovative approaches that Windsfeld GmbH is subjecting to practical tests in the complex alpine terrain at the Windsfeld site. In this way, Windsfeld GmbH contributes to a successful energy transition.
Good news from South Africa: the Department of Mineral Resources and Energy (DMRE) of the Republic of South Africa has launched the long awaited bid window five, tendering 1.6 GW of wind energy, plus another 1 GW for solar projects! This is definitely a good sign for an industry that has waited five years for the next tender!
With a local office in Cape Town, MEASNET membership and international accreditation to ISO/IEC 17025 and MEASNET, GEO-NET is ideally placed to provide energy yield assessment services and bankable AEP reports to project planners, developers and investors. With our experience of more than 25 years and 2 GW of assessed projects in South Africa, we offer the expertise and services to make your projects fit for the current bidding round.
We wish all participants every success in the tendering process!
South Africa is a thriving wind power market with high wind potential and a huge demand for renewable energy, which offers a lot of opportunities in the wind power business. In order to facilitate business and transactions with South African clients and customers GEO-NET established a subsidiary in Cape Town, GEO-NET South Africa (Pty) Ltd. which provides all the services, experience and know how of GEO-NET to support the development of wind projects in South Africa.
The Windaba is the most important event of the South African wind industry, which is conducted as a pure online event this year due to the current pandemic restricitions. Nevertheless there is still many opportunities to meet, talk and discuss at this online event, during the conference, in direct B2B-meetings, or in the virtual exhibition. Meet GEO-NET at their virtual booth or at their presentation in the firstt Breakaway Session and learn about site assessment, the potential of complex terrain sites and the chances of looking beyond the low hanging fruits.
Since July 2020 GEO-NET is MEASNET member in the field of site assessment. MEASNET (International Network for Harmonised and Recognised Measurements in Wind Energy) is an international association of various measurement institutes which, on the one hand, jointly develop standards for site analysis and evaluation and, on the other hand, commit themselves to comply with these standards. The standards serve to ensure high data quality and good comparability
Membership in the MEASNET expert group Site Assessment opens up the possibility to actively participate in the design and improvement of the standards and to draw on the knowledge and experience gained from over 3000 projects worldwide and from numerous research projects to ensure a safe and reliable site assessment in the future.
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 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.
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.