Fast-Transient Repetitive Control Strategy for a Three-phase LCL Filter-based Shunt Active Power Filter

Zheng Zeng; Jia-Qiang Yang; Shi-Lan Chen; Jin Huang

Fast-Transient Repetitive Control Strategy for a Three-phase LCL Filter-based Shunt Active Power Filter

Vol. 14, No. 2, pp. 392-401, Mar. 2014

10.6113/JPE.2014.14.2.392

Active power filter

Harmonic compensation

Internal model principle

LCL filter

Repetitive control

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Abstract

A fast-transient repetitive control strategy for a three-phase shunt active power filter is presented in this study to improve dynamic performance without sacrificing steady-state accuracy. The proposed approach requires one-sixth of the fundamental period required by conventional repetitive control methods as the repetitive control time delay in the synchronous reference frames. Therefore, the proposed method allows the system to achieve a fast dynamic response, and the program occupies minimal storage space. A proportional-integral regulator is also added to the current control loop to eliminate arbitrary-order harmonics and ensure system stability under severe harmonic distortion conditions. The design process of the corrector in the fast-transient repetitive controller is also presented in detail. The LCL filter resonance problem is avoided by the appropriately designed corrector, which increases the margin of system stability and maintains the original compensation current tracking accuracy. Finally, experimental results are presented to verify the feasibility of the proposed strategy.

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Cite this article

[IEEE Style]

Z. Zeng, J. Yang, S. Chen, J. Huang, "Fast-Transient Repetitive Control Strategy for a Three-phase LCL Filter-based Shunt Active Power Filter," Journal of Power Electronics, vol. 14, no. 2, pp. 392-401, 2014. DOI: 10.6113/JPE.2014.14.2.392.

[ACM Style]

Zheng Zeng, Jia-Qiang Yang, Shi-Lan Chen, and Jin Huang. 2014. Fast-Transient Repetitive Control Strategy for a Three-phase LCL Filter-based Shunt Active Power Filter. Journal of Power Electronics, 14, 2, (2014), 392-401. DOI: 10.6113/JPE.2014.14.2.392.