摘要
在分布式新能源应用场合中,传统的两级式单相逆变器输入电流中含有大量低频纹波电流。此处对应用于分布式新能源发电场合的两级式单相逆变系统中能量流动、纹波功率以及输入端的纹波电流的产生机理进行了分析。基于Boost电路的小信号模型和纹波电流的等效电路模型,提出一种基于电流前馈控制的输入端纹波电流抑制方法。最后将此控制策略在基于DSP的先进数字控制平台上进行了实验,并与未引入电流前馈的传统双闭环控制模式进行了对比,实验结果验证了该控制策略的有效性和合理性。
In the two-stage single-phase renewable energy inverter system,the current drawn from renewable energy sources tends to be pulsated and contains harmful low frequency ripple components.The power flow in two stage single-phase power system,and the mechanism of ripple power and ripple current in the input are analysed.Based on Boost DC/DC convertor small signal mode,the equivalent circuit model of ripple current is studied.A novel active input ripple current mitigating technique based on current feedforward control is proposed by modifying the conventional voltage and current double-loop control method.Finally,a DSP-base experimental platform is built up with the proposed control strategy,and the results are provided to verify its effectiveness.
作者
张文军
马成龙
张伟
纪巍
ZHANG Wen-jun;MA Cheng-long;ZHANG Wei;JI Wei(State Grid East Inner Mongolia Electric Power Supply Co.,Ltd.,Hohhot O10010,China)
出处
《电力电子技术》
北大核心
2023年第1期96-100,共5页
Power Electronics
关键词
新能源
电流前馈
纹波电流
小信号模型
renewable energy
current feedforward
ripple current
small signal mode
