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Applied Sciences
Volume 15
Issue 24
10.3390/app152413282
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Triple-Passive Harmonic Suppression Method for Delta-Connected Rectifier to Reduce the Harmonic Content on the Grid Side

by
Shuang Rong
1,*,
Xueting Lei
1,
Fangang Meng
2,
Bowen Gu
1,
Zexin Mu
1,
Jiapeng Cui
1,
Kailai Ye
2,
Shengren Yong
2,
Pengju Zhang
2 and
Jianan Guan
2
1
State Grid Heilongjiang Electric Power Research Institute, Harbin 150032, China
2
College of New Energy, Harbin Institute of Technology, Weihai 264200, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2025, 15(24), 13282; https://doi.org/10.3390/app152413282
Submission received: 5 November 2025 / Revised: 16 December 2025 / Accepted: 17 December 2025 / Published: 18 December 2025
(This article belongs to the Section Electrical, Electronics and Communications Engineering)
Versions Notes

Abstract

With the development of distributed energy sources such as photovoltaic and wind power, power grids have imposed increasingly higher requirements on power quality. As common nonlinear loads in power grids, multi-pulse rectifiers (MPRs) inject significant harmonics into the grid side. To reduce harmonic pollution at the source, this paper proposes a novel triple-passive harmonic suppression method to reduce the input current harmonics of MPRs. The proposed 48-pulse rectifier comprises a main circuit based on delta-connected auto-transformer (DCT) and a triple-passive harmonic suppression circuit (TPHSC). The TPHSC consists of two interphase reactors (IPRs) and eight diodes. Based on Kirchhoff’s Current Law (KCL), the output currents of the main circuit are calculated, and the operating modes of the TPHSC are analyzed. From the main circuit’s output currents and the DCT topology, the rectifier’s input currents are derived, and the optimal turns ratio of the IPRs for minimizing the input current total harmonic distortion (THD) is determined. The total capacity of the IPRs accounts for only 2.3% of the output load power. Experimental results show that the measured input current THD is close to the theoretical value of 3.8%. Overall, the proposed rectifier offers a cost-effective solution with stronger harmonic suppression capability, making it suitable for applications requiring low grid harmonic pollution.
Keywords: grid-side power quality; delta-connected auto-transformer (DCT); parallel-connected multi-pulse rectifier (MPR); triple-passive harmonic suppression circuit (TPHSC) grid-side power quality; delta-connected auto-transformer (DCT); parallel-connected multi-pulse rectifier (MPR); triple-passive harmonic suppression circuit (TPHSC)

Share and Cite

MDPI and ACS Style

Rong, S.; Lei, X.; Meng, F.; Gu, B.; Mu, Z.; Cui, J.; Ye, K.; Yong, S.; Zhang, P.; Guan, J. Triple-Passive Harmonic Suppression Method for Delta-Connected Rectifier to Reduce the Harmonic Content on the Grid Side. Appl. Sci. 2025, 15, 13282. https://doi.org/10.3390/app152413282

AMA Style

Rong S, Lei X, Meng F, Gu B, Mu Z, Cui J, Ye K, Yong S, Zhang P, Guan J. Triple-Passive Harmonic Suppression Method for Delta-Connected Rectifier to Reduce the Harmonic Content on the Grid Side. Applied Sciences. 2025; 15(24):13282. https://doi.org/10.3390/app152413282

Chicago/Turabian Style

Rong, Shuang, Xueting Lei, Fangang Meng, Bowen Gu, Zexin Mu, Jiapeng Cui, Kailai Ye, Shengren Yong, Pengju Zhang, and Jianan Guan. 2025. "Triple-Passive Harmonic Suppression Method for Delta-Connected Rectifier to Reduce the Harmonic Content on the Grid Side" Applied Sciences 15, no. 24: 13282. https://doi.org/10.3390/app152413282

APA Style

Rong, S., Lei, X., Meng, F., Gu, B., Mu, Z., Cui, J., Ye, K., Yong, S., Zhang, P., & Guan, J. (2025). Triple-Passive Harmonic Suppression Method for Delta-Connected Rectifier to Reduce the Harmonic Content on the Grid Side. Applied Sciences, 15(24), 13282. https://doi.org/10.3390/app152413282

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