一种多功能多电平变压变频电源研制

Development of Multi-level Variable Voltage Variable Frequency Power Supply

为了适应分布式发电系统并网测试研究的需要,提出一种多功能变压变频电源,该变频电源的电压调节控制灵活,可通过单套逆变器生成较大的电压矢量,然后通过两种电压矢量的夹角控制,生成较低的电压,直至零电压,因此该电压源在低电压输出时电压精度高、谐波小;当两种电压矢量的输出电压频率不一致时,则为叠频输出。该变频电源控制系统采用DSP和FPGA,实验结果表明该变压变频电源性能优良,稳定性高。

In order to adapt the requirement of grid-connect test research in distributed grid system, a variable voltage variable frequency power supply is proposed.Voltage adjustment control is flexible and the larger voltage vectors is got- ten through the inverter.Through the intersection angle control of two kinds of voltage vectors, the smaller voltage even the zero voltage can be gotten.Power supply has the high precision and low harmonic.When the output voltage fre- quency of two kinds voltage is different,it comes the overlap frequency output.DSP and FPGA are adopt in variable frequency and the result shows that the variable voltage variable frequency has good performance and high stability.