Posters

Abstract

Doppler scanning lidar, in single, dual- or multi-lidar set-up, represent an innovative method for the site assessment of offshore wind farms. Wind speed, wind direction and turbulence can be determined for various measuring points and measuring heights from mainland, islands, or existing offshore platforms. In Japan, shore-based scanning lidar measurements are already being used for offshore wind farms projects. However, they are not yet state of the art in Europe, although their use represents great potential and a cost-efficient alternative to existing technologies such as offshore met masts or floating lidar systems. With current ranges of up to 10 km and the prospect of higher ranges through future developments, their area of application could be extended. The establishment of scanning lidar in the planning of offshore wind farms and its development into state-of-the-art technology requires a comprehensive assessment of various aspects. In addition to the lack of norms and standards for verification, calibration and measurement operation, the lack of specialized software for creating measurement campaigns and the high effort of data post-processing could be a critical factor. The necessary measurement duration of the various measurement methods in single or dual Doppler operation and the resulting costs need to be determined. To what extent can the accurate measurement of turbulence be represented in monetary terms, what is the financial impact of the uncertainties? Data is collected through a combination of literature research and market analysis to understand the current technological development status of offshore measurement methods, including met masts, floating lidar systems, single- and dual doppler scanning lidar. In addition, expert interviews are conducted with specialists from Japan to obtain comprehensive cost data over the entire life cycle of a wind measurement. An economic case study includes a detailed comparison of scanning lidar systems compared to traditional met masts and floating lidar technologies. An analysis of the transferability of the knowledge gained in Japan and the boundary conditions for the use of scanning lidar in Europe provides information on the main obstacles and challenges as well as the main advantages and opportunities. This analysis is carried out regarding the North- and Baltic Sea and a comparison with the established measurement methods met mast and floating lidar system is drawn up regarding costs, effort, measurement data and uncertainties, among other things. The use of scanning lidar has the potential to be a cost-effective method that also offers significant advantages over conventional measurement systems. This contribution provides a comprehensive overview of the application possibilities and challenges of scanning lidar in offshore wind measurement and shows how the identified barriers can be overcome and drivers for widespread use can be implemented. It also provides recommendations for the use of single- or dual doppler scanning lidar, based on a thorough assessment of economic and operational parameters. It evaluates in a detailed cost-benefit analysis in which scenarios data accuracy and measurement range offer significant added value compared to the costs and logistical requirements and if the use of scanning doppler lidar is sufficient.