Enhanced in-situ supraharmonic EMC testing: a new emission estimation method based on live impedance measurement for the 2 kHz–150 kHz range
Measurement: Journal of the International Measurement Confederation, cilt.292, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 292
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.measurement.2026.123151
- Dergi Adı: Measurement: Journal of the International Measurement Confederation
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Kocaeli Üniversitesi Adresli: Evet
Özet
Electromagnetic compatibility (EMC) compliance testing of large, high-power equipment—such as renewable energy systems and electric vehicle chargers—frequently requires in-situ evaluation because the equipment under test (EUT) is immobile. However, conventional in-situ emission measurements suffer from high uncertainty, primarily driven by the unknown and highly variable nature of the power grid impedance, particularly in the 2 kHz to 150 kHz range, commonly referred to as the supraharmonics. To address this limitation, this study proposes to reduce the measurement uncertainty of in-situ emissions by establishing an impedance-oriented correlation between in-situ and laboratory emission measurements. This was achieved using an in-situ impedance measurement method under AC power with a new combination of a VNA, an RF power amplifier, and two high-amperage current probes; thus, in-situ emission current measurements can be converted to standard laboratory voltage results. Experimental validation using an induction motor with an adjustable-speed drive and a switch-mode power supply demonstrated a strong correlation with standard laboratory measurements. Consequently, the proposed methodology reduces the total expanded uncertainty from 24.65 dB to approximately 6 dB, depending on the time-variant behavior of the frequency-dependent impedance of the grid and the EUT. This provides a highly traceable, repeatable, and cost-effective framework for supraharmonics EMC compliance testing in the field.