TY - GEN
T1 - A robust design strategy for resonant controllers tuned beyond the LCL filter resonance frequency
AU - Zhao, Xin
AU - Kang, Zhen
AU - Wu, Xuanlyu
AU - Li, Weilin
AU - Wu, Xiaohua
AU - Xie, Chuan
AU - Guerrero, Josep M.
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/5/24
Y1 - 2019/5/24
N2 - LCL filter is one of the most prevailing approaches for harmonic filtering due to its premium switching order harmonic attenuation performance. However, resonance issues, which may cause system instability, are also induced by the LCL filter. Thus, bandwidth of the inner current loop is required to be sufficiently lower than the filter resonance frequency to ensure system stability. In this paper, a robust resonant controller design strategy for converters with LCL filters is proposed to enhance the harmonic control capability. With the proposed design method, it is possible to tune the central frequency of the resonant controller above the LCL filter resonance frequency without triggering instability issues. In contrast with conventional techniques, the LCL filter can be designed with lower resonance frequency by utilizing the proposed approach. This way, a better switching order harmonic attenuation can be achieved without sacrificing high order harmonic tracking capability. Experimental results are presented to demonstrate the effectiveness of the proposed design strategy.
AB - LCL filter is one of the most prevailing approaches for harmonic filtering due to its premium switching order harmonic attenuation performance. However, resonance issues, which may cause system instability, are also induced by the LCL filter. Thus, bandwidth of the inner current loop is required to be sufficiently lower than the filter resonance frequency to ensure system stability. In this paper, a robust resonant controller design strategy for converters with LCL filters is proposed to enhance the harmonic control capability. With the proposed design method, it is possible to tune the central frequency of the resonant controller above the LCL filter resonance frequency without triggering instability issues. In contrast with conventional techniques, the LCL filter can be designed with lower resonance frequency by utilizing the proposed approach. This way, a better switching order harmonic attenuation can be achieved without sacrificing high order harmonic tracking capability. Experimental results are presented to demonstrate the effectiveness of the proposed design strategy.
KW - Control bandwidth
KW - Harmonic control capability
KW - LCL filter
KW - Resonant controller
UR - http://www.scopus.com/inward/record.url?scp=85067109199&partnerID=8YFLogxK
U2 - 10.1109/APEC.2019.8722227
DO - 10.1109/APEC.2019.8722227
M3 - 会议稿件
AN - SCOPUS:85067109199
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 3051
EP - 3055
BT - 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
Y2 - 17 March 2019 through 21 March 2019
ER -