基于弧形阵列对发射源定位的风机叶片净空检测方法研究

Research on Wind Turbine Blade Clearance Detection Method Based on Arc Array for Emission Source Localization

风机叶片在强风作用下往往会发生朝向塔筒的折弯,导致风力发电事故发生。对此,本文提出了基于弧形阵列对发射源定位的风机叶片净空检测方法。由于塔筒的阻挡,圆形阵列所有阵元中仅面向叶片部分可接收到位于叶片顶端的发射源的信号,因而推导了弧形阵列的阵列流形及方向图公式,在此基础上提出了基于弧形阵列对发射源定位的方法,进而推导出叶片净空与发射源仰角的函数关系公式。最后,基于计算机仿真验证了上述方法的可行性和有效性。

Wind turbine blades tend to bend towards the tower under strong winds thus leading to great risks for wind power generation.In this regard,a wind turbine blade headroom detection method based on curved arrays to localize the emitting source is proposed.Due to the obstruction of the tower,only the blade-facing part of the circular array can receive the signal from the emitter source located at the top of the blade,so the array flow shape and direction map formula of the curved array are derived,based on which the method of emittersource localization based on the curved array is proposed,and then the equation of the functional relationship between the blade headroom and the emitter source's elevation angle is deduced.Finally,the feasibility and effectiveness of the above method are verified by Matlab-based simulation.