摘要
针对单相并网逆变器在采用比例积分(PI)控制器时不能实现无静差跟踪,且输出滤波电容较大,使得系统不稳定及抗干扰能力差等问题,提出了一种基于准比例谐振(QPR)与PI的复合控制方法,既实现了对并网电流的无静差跟踪,又消除了PI控制引起的相位误差,同时也提高了系统的稳定性。仿真与实验充分地证明了QPR与PI的复合控制方法能够很好地实现电流的无静差跟踪。
For the single-phase grid-connected inverter,when the proportional-integral(PI)controller is used,the static-error-free tracking can not be realized,and the output filter capacitor is large,which makes the system unstable and the anti-interference ability poor.The compound control method of quasi proportional resonance(Quasi-PR)and PI not only achieves static-error-free tracking of the grid-connected current,but also eliminates the phase error caused by PI control,and also improves the stability of the system.The simulation and experiment fully prove that the compound control method of QPR and PI can realize the current tracking without static error.
作者
郑宏
赵伟
林勇
沈思伦
曹其超
ZHENG Hong;ZHAO Wei;LIN Yong;SHEN Silun;CAO Qichao(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang Jiangsu 212013,China;Jiangsu Zhuote Electrical Technology Co.Ltd.,Zhenjiang Jiangsu 212013,China)
出处
《电子器件》
CAS
北大核心
2019年第5期1107-1111,共5页
Chinese Journal of Electron Devices
关键词
单相并网逆变器
无静差跟踪
PI控制
准比例谐振(QPR)
复合控制
single-phase grid-connected inverter
static-error-free tracking
PI controller
quasi proportional resonance(Quasi-PR)
compound control
