Abstract

Because the floating LiDAR is the state-of-the-art remote-sensing technology using the laser-Doppler shifted effect, there is still no related international formal certification of the measured data. In this study, we conducted a series of tests and validation processes based on the three important stages before the commercial acceptance of the floating LiDAR released by not-for-dividend company Carbon Trust on Nov. 2013, including flume test, land test, harbor test, nearshore test, and offshore test. The objective is to verify the accuracy and reliability of the measured data. Also, the site and seasonal analysis of wind characteristics were investigated, including wind speed and wind direction. The results show the great capability and performance of the floating LiDAR and have a promising potential and influence to the offshore wind industry of Taiwan. The goal is to set the example for the series of tests and validation of floating LiDAR in Taiwan.

Introduction
Floating LiDAR

Because Taiwan lacks energy resources, lots of energy relies on importing from abroad. Taiwan is surrounded by ocean and abundant in wind resource, and it is beneficial to develop offshore wind energy to decrease the dependence of foreign energy importation.

Before the construction of offshore wind farm, it is essential to install a met mast to collect long-term wind data for wind resource assessment. Due to the high cost and low mobility, a remotely sensing technique LiDAR has been developed for wind measurement. Fig. 1 shows three kinds of floating LiDAR system in the world, including the AXYS WindSentinel of AXYS Technologies Inc., the SEAWATCH Wind LiDAR Buoy of FUGRO, and the FLiDAR of MOBILIS, Leosphere, and 3E & OWA. They take advantage of the remote-sensing technique and develop the motion-compensation algorithm to measure the wind profiles at the offshore region.

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