FPGA Simulation And Control Of Doubly-Fed Wind Turbine Converter

With the increasing of energy crisis, the continuous increase in environmental pressures, wind energy as the next most important alternative clean energy source, in recent years has drawn widespread attention and showing a vast room for growth. Doubly-fed wind power generation system due to the decrease in the inverter capacity, size and cost, at the same time, to achieve a flexible connection of wind turbines and power grid, and a wide range of variable speed operation, high power, has been widely used in the field of wind power generation.The object of this paper is simulates fast dynamic process of inverter in doubly-fed wind power generation unit on the LabVIEW FPGA simulation platform; Firstly introduce the internal structure and working principle of doubly-fed wind power generator, as well as its own unique advantages, and establish the mathematical model of three-phase static coordinate system and facilitate the analysis solution of simplified mathematical model of two phase rotating coordinate system; After that, analyzed the RLC filter circuit, line impedance and load disturbance current of three-phase PWM voltage type inverter; And make the mathematical model of the motor side of the inverter, according to the topology; The stator flux oriented vector control and space vector pulse width modulation algorithm is applied to the control of the motor side inverter to achieve the optimal control effect; Finally, make the simulation study of different conditions of doubly-fed wind power generation system such as Starting, no-load grid-connection, different speed generator running, wind speed change disturbance, Simulation result shows the doubly-fed wind turbine motor side converter veracity and the rationality of the control strategy of the model. In addition, the simulation program has friendly interface, with online parameters configuration, real-time condition monitoring, and other functions. Application of FPGA module realizes the combination of software and hardware, to reach the simulation requirements of millisecond ultra-high speed and high reliability.