CAJ | 학술논문

根据在高频脉冲交流环节逆变器(HFPALI)中实现稳定直流供电的这一需求,分析了HFPALI的特性和LCL-T导抗网络的具体特征,提出了一种与 HFPALI 公用高频方波逆变器的DC/DC变换器。分析了该DC/DC变换器的工作模态,给出了主要工作波形,推导出了该 DC/DC变换器的输出电压表达式。在控制方面,HFPALI 的并网电流控制采用周波变换器实现,DC/DC变换器的直流输出电压通过相移高频逆变器的驱动信号来实现,因此并网电流控制与直流电压控制相互独立,据此特性,提出一种基于数字信号处理器(DSP)的相位移动方法。仿真和实验结果表明,所提出的带DC/DC变换器的 HFPALI系统能稳定运行。
근거재고빈맥충교류배절역변기(HFPALI)중실현은정직류공전적저일수구,분석료HFPALI적특성화LCL-T도항망락적구체특정,제출료일충여 HFPALI 공용고빈방파역변기적DC/DC변환기。분석료해DC/DC변환기적공작모태,급출료주요공작파형,추도출료해 DC/DC변환기적수출전압표체식。재공제방면,HFPALI 적병망전류공제채용주파변환기실현,DC/DC변환기적직류수출전압통과상이고빈역변기적구동신호래실현,인차병망전류공제여직류전압공제상호독립,거차특성,제출일충기우수자신호처리기(DSP)적상위이동방법。방진화실험결과표명,소제출적대DC/DC변환기적 HFPALI계통능은정운행。
A stable DC power supply may be required in the high frequency pulse AC link inverter(HFPALI).To meet this demand,this paper proposes a DC/DC converter that shares the high-frequency square-wave inverter with HFPALI after analyzing the characteristics of the HFPALI and LCL-T immittance network.Each working mode of this DC/DC converter is analyzed and the key waveforms are presented.The expression for the DC output voltage is then deduced.With respect to control,the grid-connected current of HFPALI can be adjusted with a cycloconverter and the DC output voltage can be controlled by shifting the phases of driving signals of the high-frequency inverter.So the grid-connected current control is independent of the DC voltage control.A simple phase shifting method is hereby proposed based on the digital signal processor (DSP).Finally,the simulation and experimental results show that the proposed HFPALI system with DC/DC converter is stable in operation. This work is supported by National Natural Science Foundation of China (No.51107108,No.51077070),Qing Lan Project and Jiangsu Key Laboratory of New Energy Generation and Power Conversion.