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Hybrid EMI Mitigation in PV Systems
Subject area: Science,Engineering and Technology · Area of research: EMI and EMC
Abstract
Photovoltaic (PV) inverter systems play a crucial role in renewable energy applications. Nevertheless, their rapid switching activity frequently produces unwanted electromagnetic interference (EMI), which diminishes performance and leads to non-compliance with electromagnetic compatibility (EMC) regulations. This study suggests a hybrid method for EMI reduction that integrates Spread Spectrum Pulse Width Modulation (SSPWM) with an RC snubber circuit. SSPWM distributes the spectral energy of switching harmonics across a broader frequency range, thus reducing the intensity of EMI peaks. The RC snubber circuit, conversely, captures transient energy and minimizes voltage spikes resulting from switching transitions. Analysis through simulation and experimentation was performed for four scenarios traditional PWM, SSPWM, RC snubber, and the hybrid setup. The comparative findings indicate that the hybrid method achieves considerable EMI reduction, lessening both the amplitude of high-frequency noise and the strength of narrowband spikes. This approach is straightforward, cost-effective, and works well with current inverter designs.
Keywords
Electromagnetic Interference (EMI), Photovoltaic Inverter, Spread Spectrum PWM, RC Snubber, Hybrid Mitigation, Switching Noise, Power Electronics.
References
[1] A. Kodali, Engineering Electromagnetic Compatibility, 2nd ed. Hoboken, NJ, USA: Wiley-IEEE Press, 2017.
[2] Y. Yang, F. Blaabjerg, and D. Chen, “EMI mitigation techniques in power electronic converters—A comprehensive review,” IEEE Transactions on Power Electronics, vol. 36, no. 4, pp. 4153–4167, Apr. 2021.
[3] S. K. Dhar and P. Mitra, “Implementation of spread spectrum PWM for EMI reduction in inverter systems,” IEEE Transactions on Industrial Electronics, vol. 66, no. 5, pp. 3710–3718, May 2019.
[4] M. Ahmed and A. Elserougi, “Design of RC snubber networks for EMI suppression in high-frequency converters,” in Proc. IEEE IECON – 46th Annual Conference of the IEEE Industrial Electronics Society, Singapore, Oct. 2020, pp. 2438–2443.
[5] M. R. Khan and R. Datta, “Hybrid EMI suppression in PV inverters using control and circuit-level approaches,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 6, pp. 7602–7612, Dec. 2021.
[6] S. R. Kumar and V. Singh, “Analysis of conducted EMI in grid-connected PV inverters and its reduction using spread-spectrum control,” IEEE Access, vol. 10, pp. 58412–58423, Jun. 2022.
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[8] J. M. Guerrero and L. Zhang, “Control strategies for EMI reduction in renewable energy inverters,” IEEE Transactions on Energy Conversion, vol. 35, no. 3, pp. 1587–1599, Sep. 2020.
How to cite this paper
@article{1711928,
author = {Sushmitha V, Sittalatchoumy R},
title = {Hybrid EMI Mitigation in PV Systems},
journal = {Iconic Research And Engineering Journals},
year = {2025},
volume = {9},
number = {5},
pages = {670-677},
issn = {2456-8880},
url = {https://www.irejournals.com/formatedpaper/1711928.pdf},
abstract = {Photovoltaic (PV) inverter systems play a crucial role in renewable energy applications. Nevertheless, their rapid switching activity frequently produces unwanted electromagnetic interference (EMI), which diminishes performance and leads to non-compliance with electromagnetic compatibility (EMC) regulations. This study suggests a hybrid method for EMI reduction that integrates Spread Spectrum Pulse Width Modulation (SSPWM) with an RC snubber circuit. SSPWM distributes the spectral energy of switching harmonics across a broader frequency range, thus reducing the intensity of EMI peaks. The RC snubber circuit, conversely, captures transient energy and minimizes voltage spikes resulting from switching transitions. Analysis through simulation and experimentation was performed for four scenarios traditional PWM, SSPWM, RC snubber, and the hybrid setup. The comparative findings indicate that the hybrid method achieves considerable EMI reduction, lessening both the amplitude of high-frequency noise and the strength of narrowband spikes. This approach is straightforward, cost-effective, and works well with current inverter designs.},
keywords = {Electromagnetic Interference (EMI), Photovoltaic Inverter, Spread Spectrum PWM, RC Snubber, Hybrid Mitigation, Switching Noise, Power Electronics.},
month = {November},
doi = {https://doi.org/10.64388/IREV9I5-1711928}
}