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High-order frequency self-adaptive selective harmonic repetitive control for grid-connected inverters
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DOI：10.1007/s43236-026-01300-9.png)
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Abstract
En 中文
Repetitive control is widely applied in grid-connected inverters for harmonic suppression. However, its performance degrades under grid frequency fluctuations. This paper proposes a high-order frequency self-adaptive selective harmonic repetitive control (HO-FSA-SHRC) scheme that integrates a high-order selective harmonic repetitive controller (HO-SHRC) with an infinite impulse response filter to mitigate frequency-induced degradation. Unlike conventional HO-SHRC, which only enhances adaptability within narrow ranges, or fractional-order selective harmonic repetitive control (FO-SHRC), which rely on complex filters with slower dynamics, the proposed method achieves a balance among adapt-ability, dynamic performance, and implementation efficiency. A composite structure with deadbeat (DB) control further improves the transient response, with stability criteria and parameter design provided. Experiments on a three-phase inverter demonstrate THD below 1%, steady-state tracking error of approximately 0.07 A, and convergence within 0.08 s, confirming its effectiveness.
Keywords:
Frequency self-adaptive
Higher order repetitive control
IIR filter
Selection of harmonic repetitive control
Total harmonic distortion
Journal
J
IF:
1.3
Papers:
148
Citations:
0
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