In order to find out the usability of the nacelle mounted light detection and ranging (lidar) for power performance testing under the condition of excavated terrain, an experimental investigation was carried out at the DBK wind farm on Jeju Island, South Korea. A nacelle lidar installed on a 2 MW test wind turbine was used with an 80 m tall met mast and a ground-based lidar for measuring wind conditions. The measurement sector was calculated for the site, which was reduced to the analysed sector for finding out the influence of the excavated landfill. Since the excavated landfill was located near the test wind turbine, the excavated terrain was evaluated according to International Electrotechnical Commission (IEC) 61400-12-1, 2nd edition and the power curve was drawn using met mast wind speeds at the hub height, which was compared with that from the turbine manufacturer. The excavated terrain was further analysed using the Computational Fluid Dynamics (CFD) technique to determine whether it has an influence on wind flow. Then, the wind speed data measured by cup anemometers on the met mast, the ground-based lidar and the nacelle mounted lidar were compared through the linear regression method. The rotor equivalent wind speed (REWS) was calculated using met mast and ground lidar wind speeds according to the IEC 61400-12-1, 2nd edition. The power curves were obtained by applying the REWS and the nacelle lidar measurements. In addition, the relative errors of the power outputs were estimated and further annual energy productions (AEPs) were analysed by applying the Rayleigh wind speed distribution to the power curves. As a result, the effect of the excavated terrain on the power curve was very small. The power curves using the nacelle lidar measurements were mostly the same as the power curve using the REWS.

为了发现机舱安装的光检测和测距（激光雷达）在开挖地形条件下进行功率性能测试的可用性，在韩国济州岛的DBK风电场进行了一项实验研究。安装在2兆瓦测试风力涡轮机上的机舱激光雷达与80 m高的气象桅杆和地面激光雷达一起用于测量风况。计算场地的测量范围，然后将其缩小为分析的范围，以了解挖掘的垃圾填埋场的影响。由于挖出的垃圾填埋场位于测试风力涡轮机附近，因此根据国际电工委员会（IEC）61400-12-1，第二版对挖出的地形进行了评估，并使用轮毂高度处符合的桅杆风速绘制了功率曲线，与涡轮机制造商进行了比较。使用计算流体动力学（CFD）技术对挖掘的地形进行了进一步分析，以确定其是否对风流产生影响。然后，通过线性回归方法比较了由风速计在气象桅杆，地面激光雷达和安装在机舱上的激光雷达上测得的风速数据。转子等效风速（REWS）是根据IEC 61400-12-1第2版使用满足的桅杆和地面激光雷达风速来计算的。功率曲线是通过应用REWS和机舱激光雷达测量获得的。此外，通过将瑞利风速分布应用于功率曲线，估计了功率输出的相对误差，并分析了进一步的年度能源生产（AEP）。因此，开挖地形对功率曲线的影响很小。使用机舱激光雷达测量的功率曲线与使用REWS的功率曲线基本相同。