1.5mw Difg Wind Turbine Converter Control System

In this paper, double-fed 1.5MW wind turbine as the research object, the 1.5MW double-fed turbine inverter's control were studied. Existing 1.5MW double-fed turbine inverter of the national grid to achieve the proposed wind farm reactive power and active power regulation, grid voltage and frequency requirements and the requirements for low voltage ride through, hardware must be taken to control and change accordingly.This paper designs 1.5MW double-fed turbine inverter circuit the overall hardware, meet the overall stability of turbine and high efficiency. To achieve LVRT function, this paper designed a new CROW BAR circuit. This paper has studyed 1.5MW DFIM inverter system control strategy, rotor side converter using the stator flux oriented vector control technology, grid side of the PWM converter with grid voltage oriented vector control, construction of the inner current loop, double loop PI voltage outer control system, derived using the rotor active current and reactive current decoupling to separate active and reactive power control strategy. The PSCAD/EMTDC platform 1.5MW DFIG established the overall simulation model. Wind turbines in stator flux oriented vector control strategy, completed an independent active and reactive power control, variable speed constant frequency operation to track the largest wind energy, wind farm control of voltage and frequency expectations. Ground fault in the power of simulation time, the fan can help in CROW BAR for low voltage ride through, which proves the double-fed 1.5MW wind turbine disturbance and transient stability.In practice, double-fed wind power 1.5MW machine platform, based on the overall conduct of the turbine and grid commissioning and commissioning, had been the stator flux oriented speed sensorless vector control of 1.5MW doubly-fed machine debugging, verification, and the turbine grid control strategies and vector control principle, after the turbine and power generation, for the voltage and current detection. Finally, Shows the measured waveforms and debug the results of analysis.