Experimental study on wake interactions and performance of the turbines with different rotor-diameters in adjacent area of large-scale wind farm

• Published in: Energy (Oxford) 2020-05, Vol.199, p.117416, Article 117416
• Main Authors: Fei, Zhao, Tengyuan, Wang, Xiaoxia, Gao, Haiying, Sun, Hongxing, Yang, Zhonghe, Han, Yu, Wang, Xiaoxun, Zhu
• Format: Article
• Language: English
• Subjects: Area; Diameters; Different rotor diameters; Lidar; LiDAR measurement; Recovery; Rotors; SCADA data; Turbines; Upstream; Velocity; Wake interactions; Wind effects; Wind farms; Wind power; Wind power generation; Wind speed; Wind turbine power generation; Wind turbines
• ISSN: 0360-5442; 1873-6785
• DOI: 10.1016/j.energy.2020.117416

Caused by the expansion construction of large-scale wind farm, wind turbines of different rotor-diameters always exist in typical area with abundant wind resources. This paper investigates the wake characteristics of turbines with different rotor-diameters and their wake interactions as well as performance through LiDAR measurement and SCADA data. The experiment wind farm is located in North China with a flat terrain and three different types of wind turbines are installed. Results show that the wake recovery is related to the rotor diameter, the larger of the turbine, the slower of its wake recovery. The wake of downwind turbine is aggravated by the upstream turbine’s wake, reflected in broader wake width, larger velocity deficit and depth. Meanwhile, the upstream wind turbine’s wake that close to the downstream wind turbine can also be affected, reflected in the velocity deficit and the wake width suddenly increases when the wake approaching the downwind turbine. The power loss caused by wake effect increased sharply when wind speed decreases and the wake of a 1.5 MW wind turbine makes a great power loss even after a long distance, thus, the wake effect of large wind turbine should be paid more attentions. •Wake interaction and turbines’ performance in adjacent area of large-scale wind farm is studied.•The experimental wind field has three types of wind turbines with different rotor diameters.•LiDAR measurements and SCADA data are both adopted.•Wake characteristics and interactions are analyzed in different scenarios.•The wind turbine power generation under different conditions is analyzed.