CAJ | 학술논문

太阳能电池、风力发电，以及燃料电池等新能源发电中的并网逆变器技术的研究已经成为一个重要的研究方向。为了消除逆变器输出电流中的高次谐波，通常采用LCL滤波器对谐波进行处理。但是LCL滤波器是无阻尼三阶系统，使输出容易产生谐振，因此逆变器电流控制器的研究成为了研究的热点。本文就当今使用较为热门的电容电流内环、入网电流外环的双闭环控制策略进行分析，使用MATLAB／Simulink进行仿真，并在仿真中加入功率因数（PF）的验证。从仿真结果看出该方案可有效地避免入网电流谐振，入网电流能很好地跟踪并网电压，达到同频同相，功率因数约等于1，并且在FFT谐波分析中达到满意的效果。
태양능전지、풍력발전，이급연료전지등신능원발전중적병망역변기기술적연구이경성위일개중요적연구방향。위료소제역변기수출전류중적고차해파，통상채용LCL려파기대해파진행처리。단시LCL려파기시무조니삼계계통，사수출용역산생해진，인차역변기전류공제기적연구성위료연구적열점。본문취당금사용교위열문적전용전류내배、입망전류외배적쌍폐배공제책략진행분석，사용MATLAB／Simulink진행방진，병재방진중가입공솔인수（PF）적험증。종방진결과간출해방안가유효지피면입망전류해진，입망전류능흔호지근종병망전압，체도동빈동상，공솔인수약등우1，병차재FFT해파분석중체도만의적효과。
Research on grid-connected Inverter technology for new energy s power generation, such as solar cells, wind power, fuel cells and so on, has become an important research direction. In order to eliminate the higher harmonics in output current, LCL filter is usually utilized for processing. However, due to that the LCL filter is undamped third order system which easily resonates; the current controller for inverter also becomes a hot focus. In this paper, the more popular control strategy with a double-loop control of capacitor current inner-loop and grid current outer-control is analyzed. The simulation is completed in MATLAB/Simulink, in which power factor （PF） is added to testify its magnitude. The simulation result shows that the scheme can effectively avoid grid current s resonance and the grid current can effectively tracks grid voltage with the same frequency and the same phase. The power factor approximates to 1 and a satisfactory effect in FFT harmonics analysis is arrived.