电源变换器在风力发电中的技术研究

随着风力发电技术的快速发展,高性能的电源变换技术受到人们的广泛关注.在此采用基于DSP的数字控制技术,设计了一个新型的AC/DC/AC电源变换器.该变换器前级为三相两开关Boost PFC电路,采用DSP产生两路相位差为180°频率可变的PWM信号进行控制,实现了部分解耦控制,能有效减少输入电流的谐波含量并提高功率因数...

The Study of Power Inverter for Wind Power Generation

With the wind-powered electricity develop rapidly,high performance power conversion technology is taken more attention.A novel AC/DC/AC power inverter is given,which is controlled by DSP.The former converter uses three-phase two-switch Boost PFC circuit,and this part is controlled by two PWM signal with the 180° phase differ-ence and variable frequency generated by the DSP.It realizes part-decoupling control.Thus,rectifier converter has the merits such as sinusoidal input current waveform,high input power factor and device.The later circuit uses three-phase PWM voltage source inverter,and this part is controlled by the SPWM signal generated by DSP with asymme-try-regulation-sampling method.Thus,the output voltage waveform of the inverter is sinusoidal,and the harmonic cur-rent can be reduced.On this basis,a power converter is completely designed and successfully developed,and experi-ments are done to prove the correction of the design.