Study On Resonance Characteristics And Suppression Of The Hydraulic Type Floor-wind Turbine

With the development's backgroud of the new clean energy source,wind energy has obtained very big development space as a green energy.Now,the development trend of wind power generation technology includes more power ranks,more application locations and fields,more diversified models.Hydraulic type wind turbine is the emerging of wind power generation technology application under this environment trend.However,the higher the generating power of a single unit,the more wind wheel diameter and unit weight,so,a series of problems about the installation and maintenance need to be resolved.Therefore,there is the hydraulic type floor-wind turbine created.In addition to the hydraulic pump,other parts are installed in the foundation in hydraulic type floor-wind turbine,so the model not only improves the work of the unit weight ratio,but also reduced cabin weight of large units.However,the long pipeline of the unit increases the flexible structure,but brought the resonant problem.To solve the above problems and realize engineering applications,it is necessary to study the resonant characteristics and search the harmonic suppression methods.In this paper,taking resonant problem as the research object,using the method of impedance and circuit similar principle,the impedance models of the unit including the models of the pump,the long pipeline and the motor were established.So that,the source impedance equation and pressure transfer equation were derivated.The main factors influencing the pipeline system vibration are pipeline characteristic impedance and load impedance.Taking the motor as the load impedance,the leakage representing the resistive parameters,the vessel representing the capacitive parameters and the perceptual and resistance parameters existing in the rotation were also included.Then,pressure transfer equation,pressure-load torque transfer function,speed ratio transfer equation and speed-load torque transfer function were derivated.The influence regularities of the different load impedancec haracteristics to pressure transfer equation and speed transfer function were analysised,the motor angular effected the sensibility and the resistance of the motors among them.On the basis of analysis of the resonant characteristics,the resonance frequency of the speed transmission and pressure transmission were calculated,then the selection principles of the resonant length and avoiding resonance length are respetively summarized according to the resonance condition;harmonic suppression method including impedance match were analysised,and learning from hydraulic type wind turbine control,The unit introducted the throttle valve and analysised its effects on MATLAB.Finally,the experimental research of transmission characteristics in hydraulic type floor-wind turbine was carried out,basing on 60 kVA simulation experiment platform in yanshan university.