Design And Study On The Controller Of Variable Speed Constant Frequency Wind Energy Generation System

Nowadays, more and more people pay attention to the energy crisis and environmental pollution, which was put on the agenda Chronicle by each country. In many new energies, people concern on the wind energy which has many advantages: renewable,clean,no pollution and so on. Technically in the wind power changed from independent to the grid-connected gradually, so the grid-connected has been turned to the main of the wind energy generation.As vary speed constant frequency (VSCF) can generate more energy,adapt the vary wind speed and have better tip-speed ratio, so it must instead the constant speed constant frequency direct drive wind energy generation system. There are many kinds of VSCF wind energy generation system, this dissertation study on the permanent magnetic Synchronous generator, which has many advantages: it can improve the transition ratio of wind,little accident,reduce the noise,increase the reliability and do not need the gear-box.This dissertation mainly talks about the double PWM converter of the direct drive wind energy generation system, firstly, based on the VSCF, analyses the mathematic model of the Wind turbine, then complete the simulation. As the power is vary follow the wind speed, so we must control the converter in order to the output power is constant voltage and constant frequency (CVCF). Second based on the study mathematic of the permanent magnetic Synchronous generator and the converter, independently control the generator converter and the grid converter, the speed of the generator is controlled by the converter of the generator, and control the converter of the grid is order to access the constant voltage and the constant frequency which delivers to the power grid. And choose the dimension of the resistance and inductance, based on the front analysis, complete the simulation and the result is given.Based on the front theory analysis, design the hardware and the software of the inverter. The intelligent power module (IPM) as the inverter, sampling circuituses the Hall sensor, the controller is TMS320F2407A, and made the PCB of the sampling signal processing,PWM signal processing and the sampling circuit,write the program.