A Capacitor-Current-Feedback Active Damping Control Strategy With Phase Lead Compensation for LCL-Type Grid-Connected Inverter

被引：0
作者：
Zhang, Xieyan [1 ]
Xie, Yixuan [1 ]
Wu, Renwei [1 ]
机构：
[1] Hunan Normal Univ, Coll Informat Sci & Engn, Changsha 410081, Peoples R China
来源：
IEEE ACCESS | 2024年 / 12卷
关键词：
Damping; Digital control; Regulators; Lead; Inverters; Resonance; Frequency response; Delays; Impedance; Frequency control; Grid-connected inverter; LCL filter; capacitor-current-feedback active damping; digital control; phase lead compensation; ROBUSTNESS;
D O I：
10.1109/ACCESS.2024.3497004
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Capacitor-current-feedback (CCF) active damping is widely used to deal with the hazard of LCL filter resonance in the grid-connected inverter based on either phase lead or lag compensation, and the effect of active damping on open-loop of the control system can be evaluated directly by its equivalent impedance. However, the principle of phase compensation for active damping is not clear, and it is difficult to point out how to regulate the compensator to achieve the desired effect of virtual impedance. This paper presents a comprehensive investigation of active damping control of the LCL-type grid-connected inverter. Firstly, the effect of digital control delay on unstable poles of CCF active damping and the principle of phase compensation are identified by analyzing the frequency response of the inverter system. Subsequently, the designs of CCF active damping with phase lead compensation and proportional resonance regulator are studied to guarantee the performance of the inverter system, where a novel solution is given to find the frequencies of phases with -180 degrees crossings, which is essential to the design of control parameters. Finally, the effectiveness of the proposed method has been validated by the experimental results.
引用
收藏
页码：193663 / 193675
页数：13
相关论文
共 18 条
  • [1] Liu Q., Caldognetto T., Buso S., Review and comparison of grid-tied inverter controllers in microgrids, IEEE Trans. Power Electron, 35, 7, pp. 7624-7639, (2020)
  • [2] Wu W., Liu Y., He Y., Chung H.S.-H., Liserre M., Blaabjerg F., Damping methods for resonances caused by LCL-filter-based currentcontrolled grid-tied power inverters: An overview, IEEE Trans. Ind. Electron, 64, 9, pp. 7402-7413, (2017)
  • [3] He S., Zhou D., Wang X., Zhao Z., Blaabjerg F., A review of multisampling techniques in power electronics applications, IEEE Trans. Power Electron, 37, 9, pp. 10514-10533, (2022)
  • [4] Pan D., Ruan X., BaoW. Li C., Wang X., Capacitor-current-feedback active damping with reduced computation delay for improving robustness of LCL-type grid-connected inverter, IEEE Trans. Power Electron, 29, 7, pp. 3414-3427, (2014)
  • [5] Pan D., Ruan X., Bao C., Li W., Wang X., Optimized controller design for LCL-type grid-connected inverter to achieve high robustness against grid-impedance variation, IEEE Trans. Ind. Electron, 62, 3, pp. 1537-1547, (2015)
  • [6] Xu J., Xie S., Zhang B., Stability analysis and improvement of the capacitor current active damping of the LCL filters in grid-connected applications, J. Power Electron, 16, 4, pp. 1565-1577, (2016)
  • [7] Mattos E., Borin L.C., Osorio C.R.D., Koch G.G., Oliveira R.C.L.F., Montagner V.F., Robust optimized current controller based on a two-step procedure for grid-connected converters, IEEE Trans. Ind. Appl, 59, 1, pp. 1024-1034, (2023)
  • [8] Li X., Wu X., Geng Y., Yuan X., Xia C., Zhang X., Wide damping region for LCL-type grid-connected inverter with an improved capacitorcurrent- feedback method, IEEE Trans. Power Electron, 30, 9, pp. 5247-5259, (2015)
  • [9] Fang T., Shen S., Zhang L., Jin Y., Huang C., Capacitor current feedback with phase-lead compensator to eliminate resonant frequency forbidden region for LCL-type grid-connected inverter in weak grid, IEEE J. Emerg. Sel. Topics Power Electron, 9, 5, pp. 5581-5596, (2021)
  • [10] Faiz M.T., Khan M.M., Xuhui Y., Ali A., Yang Y., Aziz S., Loo K.H., An alternative control synthesis for stability enhancement of digitalcontrolled LCL-filtered grid-connected inverter, Electr. Power Syst. Res, 213, (2022)
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