Research On The Maximum Wind Energy Capture Control Of Double-fed Wind Power Generation System

In the current critical period of energy transition, to develop wind and other renewable energy sources is a necessary requirement of sustainable development. In large-scale wind power generation system, VSCF doubly- fed wind turbine become the current mainstream model, which has a low cost, wide operating range, small converter capacity and many other advantages. In the double- fed wind power system operation, the maximum wind energy capture for improving the efficiency of the unit and the entire wind farm is critical, especially for the current installed capacity of the major new wind turbine for low wind speed, which most of the time work in the largest wind energy capture regional, the maximum wind energy capture control direc tly affect the generating capacity of wind farms, the internal rate of return, net present value and other optimization performance indicators. Therefore, to achieve maximum capture of wind energy is the key to optimal operation of wind turbines.In this paper, takes the doubly- fed wind power generatio n system as the research object. first, on the basis of the establishment of the grid-side and rotor-side converter three and two phase stationary coordinate system mathematical model, introduced the sliding mode controller-direct power control(SMC-DPC) application on both sides of the converter. For grid-connected wind power system, integrated control of power is the most fundamental goal of their control, so the direct power control more direct and effective. SMC-DPC both fully retained the traditional advantages of direct power, but also a combination of Sliding Mode Control`s robustness, has obvious advantages.Furthermore, on the basis of the wind turbine characteristics detailed modeling analysis, to elucidate the principle of the maximum wind energy capture. Comparative analysis the maximum wind energy capture methods- based on wind speed information and no wind speed, illustrates the derivation of the control method is essentially consistency. method power signal feedback,it does not require Wind speed but simple and effective. Select the power signal feedback method it does not require wind speed but simple and effective,then based on the SMC-DPC to achieve maximum wind energy.To achieve simulated wind turbine under laboratory conditions, ACS550 drive external control system based on d SPAC E real- time simulation systems has been designed in this paper, While designed the PC control system interface contains the simulated wind speed, achieved the completely simulation of wind speed and wind turbine output characteristics. Finally, verify the theory on the 10 k W Wind Turbine Generation Experimental Platform, It proved the correctness and feasibility of the maximum wind energy capture control strategy.