Limitations in Applying the Existing LISN Topologies for Low Frequency Conducted Emission Measurements and Possible Solution

Wan, Lu; Khilnani, Arun; Hamid, Abduselam; Grassi, Flavia; Spadacini, Giordano; Pignari, Sergio; Sumner, Mark; Thomas, David

Abstract

The use of power electronic converters to interface renewable sources and intelligent loads to electricity distribution systems is increasing at a rapid rate as they bring flexibility and control to the system. However, they also bring an increased level of conducted emissions (CE) to the system due to their switching behaviour - usually at a few tens of kilohertz. The increased emissions are seen particularly in the low-frequency range (2-150 kHz) and it may possibly impair the operation of information and communication technology (ICT) equipment connected to the same system. It is therefore essential to assure accurate measurement of low frequency emissions from a particular piece of equipment, to ensure it meets standards for electromagnetic compatibility (EMC). According to EMC standards, CE are usually measured by using a Line Impedance Stabilization Network (LISN). However, the standard LISN bandwidth does not fully cover this low-frequency range (2-150 kHz), resulting in inaccurate measurement and poor repeatability. This paper examines this issue, by investigating the limitations in using the CISPR 16-1-2 LISN topology for CE measurement at low frequency in a grid-tied inverter system, and by proposing a possible solution, which requires adding extra components to the LISN circuit.

Citation

Wan, L., Khilnani, A., Hamid, A., Grassi, F., Spadacini, G., Pignari, S., Sumner, M., & Thomas, D. (2021, September). Limitations in Applying the Existing LISN Topologies for Low Frequency Conducted Emission Measurements and Possible Solution. Presented at 2021 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), Nusa Dua - Bali, Indonesia and online

• Presentation Conference Type: Edited Proceedings
• Conference Name: 2021 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)
• Start Date: Sep 27, 2021
• End Date: Sep 30, 2021
• Acceptance Date: Sep 27, 2021
• Online Publication Date: Nov 16, 2021
• Publication Date: Sep 27, 2021
• Deposit Date: Nov 28, 2024
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Pages: 92-96
• Series ISSN: 2640-7469
• Book Title: Proceedings of the 2021 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2021
• ISBN: 978-1-7281-7621-5
• DOI: https://doi.org/10.1109/APEMC49932.2021.9596980
• Public URL: https://nottingham-repository.worktribe.com/output/10072066
• Publisher URL: https://ieeexplore.ieee.org/document/9596980