Design And Research On The Simulating Experimental Platform Of IM-PMSG Wind Turbine

With the development of economy, energy consumed by human beings is sharplyincreasing. The storage of traditional fossil fuel is limited. Wind power, as non-polluted,renewable energy has caught researchers’ eye and become the focus of this field. In the wholeprocess of researching wind power technology, it can be divided into pre-experiment andpost-practice. Based on the pre-experiment, both of the two periods share the sameimportance. In the pre-experiment, wind power experimental conditions are extremely limited,which makes it difficult to debug the equipment in the field. On the other hand, there are somedrawbacks in pure physical experiment, which are not easy to solve in reality. So this paperaims to design a wind power simulation platform, combining hardware with software, and toverify the control strategies and algorithmic accuracy.The experimental platform uses the IM (Induction Motor) to drag the PMSG (PermanentMagnet Synchronous Generator). the research work of this paper is carried out according tothe following aspects:(1) The wind speed-analyzed model can be verified by simulation programs.The outputcharacteristics of IM and wind turbine are analyzed, the plan of IM simulate of wind turbine isdesiged, the output of the wind turbine model is set up, it can be verified through simulationprograms at last.(2) Based on the model of the wind turbine torque, the IM is simply analyzed. This paperadopts an improved space vector pulse width modulation-based hysteresis current controller(SVBHCC) The core of SVBHCC is selecting the best space voltage vector, in order to makethe output stator current error minimum. The accuracy of output characteristics of IM can beverified through simulation programs.(3) The control strategy of PMSG is further analyzed. This process needs to take thecontrol strategy of MPPT(maximum power point tracking) into consideration. This paperadopts the control strategy of MPPT based on stop and restart mechanism. When the slope isclose to zero, the stop mechanism is used, the disturbance step is zero; when the externalenvironment suddenly change, restart mechanism will be used to set up the tracking directionand disturbance step. It can be verified through simulation programs.Based on the above research and design, according to the electrical technical indicators ofwind power experiment platform, the lectotype and components of hardware circuit iscompleted; the peripheral circuit of the main control chip(TMS320F2812) is designed；thesoftware design is completed; Finally, it can complete real-time electrical technical indicatorsby debugging existing wind power simulation platform.