Design and verification of increasing power generation for 2 MW wind turbine based on blade tip extension

Due to the disadvantage of production technology and design level, some problems are created to the wind turbines built in early, such as annual power output is low and of wind field efficiency is not high. Compared to using whole new wind turbines, blade tip extension technology is a promising and economic method to increase the power output of 2MW level wind turbines built in early. The basic principle of power generation improvement of wind turbine based on blade tip extension technology is analyzed. The overall scheme of blade tip extension is designed. The design scheme of blade tip extension section is introduced in detail from four aspects, such as pneumatic design, structure design, bonding design and lightning protection design. The system simulation platform based on Bladed software and Focus software is built. The simulation results show that the annual power generation of the wind turbines can be increased by up to 9.5% by the developed blade tip extension. The rated wind speed of the wind turbines can be reduced to 9.1 m/s. It provides a feasible scheme for MW wind turbines to increase the power generation in wind farms during low wind speed field.