EMI Analysis and Suppression of the Ship Digital Grounding System

Abstract:

Based on the digital serial communication, E1 and Ethernet port circuits connecting the electronic equipment on ships, characterizations of the digital signals transmitted through the circuits are analyzed. The situations when the EMI generated by the digital systems causing pollution to the grounding system and the grounding voltages coupled to the signal-transmitting circuits are simulated. Furthermore, the influence of the equivalent impedance of the main and branch grounding cables on the grounding performance are analyzed quantitatively. Therefore, the grounding demand is obtained. Finally, some anti-interference measures so as to improve the grounding performance are proposed.

• Periodical: Applied Mechanics and Materials (Volumes 719-720)
• Pages: 635-639
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.719-720.635
• Online since: January 2015
• Authors: Wen Wu Song, Meng Tao Qin*
• Keywords: Digital System, EMC, EMI, Grounding Technique

References

[1] Qi Zhang. Grounding of electronic devices and suppression to the ground interferences. Manager's Journal, (2005).

[2] LEWIS W H. Grounding and Bounding [Z]. Handbook of EMC Part III, Section 8, (1995).

[3] Xingru Xu, etc. Grounding Technique of ship electronic system and devices. Ship Standardization Engineer, (2004).

[4] Perez R. Handbook of Electromagnetic Compatibility [M]. New York, Academic Press, INC, (1995).

[5] Zhengjie He, Limei Guo. Grounding interference suppression of the substation weak current system. Small Hydro Power, (2004).

[6] Z Rong, C Weiyuan, H Jinliang. Measurement Method and Test Data Analysis of Grounding Impedance of Substation. High Voltage Engineering, (2004).