DESIGN OF EMI FILTER BASED ON NOISE SOURCE IMPEDANCE EXTRACTION OF PHOTOVOLTAIC INVERTER

Wang Haining; LiMingjie; Su Jianhui; Zhang Peng; Zhang Jian

doi:10.19912/j.0254-0096.tynxb.2024-0145

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 345-354. DOI: 10.19912/j.0254-0096.tynxb.2024-0145

DESIGN OF EMI FILTER BASED ON NOISE SOURCE IMPEDANCE EXTRACTION OF PHOTOVOLTAIC INVERTER

Wang Haining, LiMingjie, Su Jianhui, Zhang Peng, Zhang Jian

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Abstract

An efficient design method of EMI filter based on the extracted noise source impedance extraction for photovoltaic inverter is proposed. A two-port network equivalent model of the EMI filter is established and the influence of noise source impedance on the insertion loss of the filter is analyzed. The boundary of common mode/differential mode noise source impedance of the photovoltaic inverter is obtained by the single inductance/single capacitance insertion loss method, and the design equations of EMI filter parameters on both AC side and DC side of the photovoltaic inverter are given by turning frequency. Finally, the noise source impedance of the 20 kW photovoltaic inverter is extracted and incorporated into the designed EMI filter. The insertion loss is simulated and measured, which verifies that the designed EMI filter can effectively suppress noise interference, thereby significantly improving the electromagnetic compatibility of the system.

Key words

inverters / electromagnetic compatibility / noise abatement / insertion loss / norse source impedance / EMI filter

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Wang Haining, LiMingjie, Su Jianhui, Zhang Peng, Zhang Jian. DESIGN OF EMI FILTER BASED ON NOISE SOURCE IMPEDANCE EXTRACTION OF PHOTOVOLTAIC INVERTER[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 345-354 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0145

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