An Integrated Trap-LCL Filter With Reduced Current Harmonics for Grid-Connected Converters Under Weak Grid Conditions

@article{Fang2017AnIT,
  title={An Integrated Trap-LCL Filter With Reduced Current Harmonics for Grid-Connected Converters Under Weak Grid Conditions},
  author={Jingyang Fang and Xiaoqiang Li and Xu Yang and Yi Tang},
  journal={IEEE Transactions on Power Electronics},
  year={2017},
  volume={32},
  pages={8446-8457}
}
High-frequency current harmonics injected into the point of common coupling, mainly at the switching frequency and its multiples introduced by the modulation of grid-connected converters, should be limited to comply with grid codes. This requirement can be satisfied by using trap filters with LC-traps tuned at the switching frequency and its multiples in replacement of conventional L filters. However, all existing trap filters are subject to certain problems, e.g., sensitivity to grid impedance… CONTINUE READING