Active damping control of grid-connected inverters with LCL filters based on over sampling

作者：Zhang, Xing^*; Chen, Peng; Yu, Changzhou; Ni, Hua

来源：Acta Energiae Solaris Sinica, 2017, 38(3): 767-773.

• Active damping
• Active damping controls
• Capacitor voltages
• Control delay
• Grid connected inverters
• Modulation signals
• Oversample
• Response performance

The resonant problem is essential for grid-connected inverters with LCL filters, then active damping methods are usually adopted. But the delay caused by digital control affects the active damping control dynamic response performance. In view of the above difficulties, on the basis of the active damping control scheme which based on capacitor voltage feedforward, oversampling is introduced. In a switching period, data is sampled and modulation signal is updated multi times. The control delay is reduced greatly. The scheme can improve active damping control dynamic response performance. Experiment results show that the proposed control scheme is correct and effective.

• 出版日期2017
• 单位合肥工业大学