TY - GEN
T1 - Stability Analysis of LCL-type Grid-Connected Inverters with Digital Delay based on Loop Gain Reconfiguration
AU - Xin, Jiang
AU - Hao, Yi
AU - Yuguo, Li
AU - Fang, Zhuo
AU - Feng, Wang
AU - Zhenxiong, Wang
N1 - Publisher Copyright:
© 2023 The Korean Institute of Power Electronics.
PY - 2023
Y1 - 2023
N2 - Active damping is an effective method to suppress high frequency oscillation of LCL inverter. However, the digital control delay may introduce the right half plane poles into the control loop, which complicates the stability analysis and parameter design of the LCL inverter with active damping. Therefore, this paper proposed a loop gain reconfiguration method. With the proposed loop gain, the delay in the original loop gain denominator is cancelled to avoid the effect of right half plane poles on stability analysis. With the proposed loop gain, the analytic formula is derived to judge the stable range of the inverter. Based on the formula, the design method of the active damping gain and effect of delay and grid impedance on the stability are derived, which greatly simplifies the stability analysis and the parameter design of active damping.
AB - Active damping is an effective method to suppress high frequency oscillation of LCL inverter. However, the digital control delay may introduce the right half plane poles into the control loop, which complicates the stability analysis and parameter design of the LCL inverter with active damping. Therefore, this paper proposed a loop gain reconfiguration method. With the proposed loop gain, the delay in the original loop gain denominator is cancelled to avoid the effect of right half plane poles on stability analysis. With the proposed loop gain, the analytic formula is derived to judge the stable range of the inverter. Based on the formula, the design method of the active damping gain and effect of delay and grid impedance on the stability are derived, which greatly simplifies the stability analysis and the parameter design of active damping.
KW - LCL-type grid-connected converter
KW - active damping
KW - loop gain reconfiguration
KW - right half plane poles
UR - https://www.scopus.com/pages/publications/85170637747
U2 - 10.23919/ICPE2023-ECCEAsia54778.2023.10213768
DO - 10.23919/ICPE2023-ECCEAsia54778.2023.10213768
M3 - 会议稿件
AN - SCOPUS:85170637747
T3 - ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia: Green World with Power Electronics
SP - 2719
EP - 2724
BT - ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia
Y2 - 22 May 2023 through 25 May 2023
ER -