风轮气动特性及新型动力系统的研究

介绍了风轮的空气动力特性及其对应的各种工况，接着介绍了目前风洞中风轮特性实验研究采用的两种基本方法：测力法和加速度法，探讨了这两种测试方法所存在的问题和应用的局限性，特别是在测力法中，目前广泛应用的两种动力系统对风轮气动特性测试的限制。在此基础上提出一种新型的动力系统－采用脉冲宽度调速技术，并以电流控制内环，转速调节外环的双闭环的动力系统，新型动力系统应用于风轮特性测试结果表明，它完全适用于风洞对

Studies on Wind-Turbine Performance and New Power System

The wind turbine performances and its relevent working states are introduced first. Then two fundamental test methods: the force-measured method and the accelerationmeasured method,which are applied to the rotor property test in the wind tunnel,are described. The problems and restrictions appeared in the application of the two test methods are discussed. Especially,the restrictions produced by the applied power systems affecting on the measure ment of the wind trubine performance are further discussed. On these bases is established a novel power system,which adopts the pulse-width modulation technique and consists of a bi-closed-loop controlled system, a current controlled inner-loop and a revolution controlled outer-loop. The test results of the aerodynamic characteristics of the wind turbine by using the novel power system show that this power system is able to meet the need of all performance tests and various states at a specific wind speed. As the result,this novel power system delivers a powerful tool for the wind turbine performance test in the wind tunnel.