Common-Mode Electromagnetic Interference Calculation Method for a PV Inverter With Chaotic SPWM

• Published in: IEEE transactions on magnetics Vol. 51; no. 11; pp. 1 - 4
• Main Authors: Yang, Zhichang, Li, Hong, Lin, Fei, Zhang, Bo, Lu, Jinhu
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-11-2015; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Chaos theory; chaotic SPWM; Common-mode EMI; Electromagnetic interference; Equivalent circuits; Fourier series; Inverters; Magnetism; Mathematical analysis; Modulation; Photovoltaic cells; PV Inverters; Solar cells; spectrum calculation; Switches; Switching frequency; Chaotic sinusoidal pulsewidth modulation (CSPWM); common-mode electromagnetic interference (CM-EMI); spectrum calculation; photovoltaic (PV) inverters
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2015.2443065

This paper proposes a common-mode electromagnetic interference (CM-EMI) spectrum calculation method based on double Fourier series for photovoltaic (PV) inverters with chaotic sinusoidal pulsewidth modulation (CSPWM). In this paper, the CM-EMI of a single-phase PV inverter is first analyzed, and the equivalent circuit of the CM-EMI in the single-phase PV inverter is established, then the CSPWM is employed to suppress the CM-EMI in PV inverters. Moreover, the proposed EMI spectrum calculation method based on double Fourier series is applied in evaluating the CM-EMI spectrum of the single-phase PV inverter. Finally, the simulation and experimental results validate the EMI suppression effectiveness of the CSPWM and the correctness of the proposed EMI spectrum calculation method. Therefore, the proposed EMI spectrum calculation method provides a theoretical support for CSPWM to reduce EMI.