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An Iterative Current Harmonic Suppression Algorithm for Single-Phase Distorted Grid Applications
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DOI：10.1109/JESTPE.2026.3653615.png)
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Abstract
En 中文
The distorted grid voltage in the distribution system induces lower order harmonics in the current sourced from the single-phase grid-connected inverter (SGI). Nonidealities of the SGI also contribute to the current distortion. This article presents a novel iterative algorithm for the SGI which suppresses current harmonics due to both the grid-side and inverter-side distortions. The mathematical basis of the method is derived in this article. The iterative algorithm is developed ensuring a computationally light implementation in modern digital microcontrollers. The proposed algorithm is verified in simulation under practical grid conditions like in a low-voltage distribution system (LVDS). Further experimental verifications were performed on a 1.1-kW laboratory prototype of an SGI with inverter-side distortion connected to distorted grid. Different lower order harmonics were separately suppressed under predefined thresholds. The measured total harmonic distortion in the current was improved from 22.24% to 2.73% at rated power.
Keywords:
Harmonic suppression
iterative algorithm
low-voltage distribution system (LVDS)
Journal
I
IF:
4.9
Papers:
249
Citations:
0
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Cited Papers
Fast Bus Voltage Control of Single-Phase Grid-Connected Converter With Unified Harmonic Mitigation.png)
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