船电技术
船電技術
선전기술
2011年
8期
48-51,55
,共5页
张鹏%金海%梁星星%余峰
張鵬%金海%樑星星%餘峰
장붕%금해%량성성%여봉
光伏逆变器%波形控制%PI控制%重复控制
光伏逆變器%波形控製%PI控製%重複控製
광복역변기%파형공제%PI공제%중복공제
photovoltaic inverter%waveform correction%" PI controller%" repetitive controller
本文通过实验指出数字PI控制器在光伏并网逆变器中的局限性,提出将重复控制器引入到电流内环中以提高稳态性能,进而将重复控制和PI控制器并联用于三相光伏并网逆变器的电流波形控制。其中PI控制保证系统动态性能,而重复控制提高电流波形跟踪精度。实验表明,采用这种方法后可以显著改善逆变器的并网电流质量。
本文通過實驗指齣數字PI控製器在光伏併網逆變器中的跼限性,提齣將重複控製器引入到電流內環中以提高穩態性能,進而將重複控製和PI控製器併聯用于三相光伏併網逆變器的電流波形控製。其中PI控製保證繫統動態性能,而重複控製提高電流波形跟蹤精度。實驗錶明,採用這種方法後可以顯著改善逆變器的併網電流質量。
본문통과실험지출수자PI공제기재광복병망역변기중적국한성,제출장중복공제기인입도전류내배중이제고은태성능,진이장중복공제화PI공제기병련용우삼상광복병망역변기적전류파형공제。기중PI공제보증계통동태성능,이중복공제제고전류파형근종정도。실험표명,채용저충방법후가이현저개선역변기적병망전류질량。
In this paper, it is pointed out through experimental result that the digital PI controller is in the limitations in the photovoltaic inverter, and it is proposed that repetitive controller is introduced into current loop to improve the steady characteristics. So PI control and repetitive control algorithm are adopted to correct the output current waveform of the photovoltaic grid-connected inverter. In this control strategy, the PI control is used to guarantee system dynamic performance and the repetitive control is to improve current waveform quality. The experimental results show that this controller design can significantly improve the grid-connected current aualitv.