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EMC of Grid-Tied Power Electronic Converters in Supraharmonics Frequency Range (Part 1)
Time:
Monday, 01/Sept/2025:
9:00am - 10:30am
Location:Room 107
75 seats, Tower 44, 1st floor
Session Abstract
The global shift of energy paradigm to carbon-free technologies has significantly increased the penetration of grid-tied power electronics. Power electronic systems are a key enabler in the energy conversion process, from renewable generation like wind/solar power, electric vehicles down to lighting. To ensure smooth transition to green technologies, electronic systems must be compatible with each other and the power grid. Recently, there have been new disturbances on power grid due to high incompatibility of power electronic systems in the new frequency range of 2-150 kHz (i.e., supraharmonics) which has been unregulated in the past. Therefore, the introduction of new international standards will challenge the power electronics industry as no clear solution exists to comply with new standards.
The emphasis of this tutorial is to give an overview on electromagnetic compatibility of power electronic converters in the supraharmonics frequency range. Firstly, the power grid data acquisition and time-frequency behavior will be introduced as well as suitability of standard AMN (Artificial Mains Network) or LISN (Line Stabilization Network). The noise propagation path modeling of power electronic converters will be focused for the second part of the tutorial, discussing the influence of DM and CM noise as well as closed loop impedance. Further, the black-box modeling strategy will be presented for power converter characterization. The third part of the tutorial is dedicated to EMI filter design as well as lifetime considerations which suitable topology and material selection will be discussed as well as influencing factors on the filter lifetime consideration. Finally, the tutorial is concluded by introducing a new developed software tool for EMI prediction and design for EMC in power electronic converters.
Presentations
9:00am - 9:15am
Introduction to Supraharmonics EMI/EMC Challenge in Power Electronics
Pooya Davari
Aalborg University, Denmark
The tutorial will begin with introducing the important role of power electronics in electrical power grids. With the focus on supraharmonics frequency range challenges EMI issues of the power electronic converters will be highlighted as well as giving an overview on the IEC standardization activity in 2-150 kHz frequency range.
9:15am - 9:45am
Grid Characterization and Data Collection
Abduselam Beshir Hamid1, Per Thåstrup Jensen3, Szymon Pasko2
The measurement method on grid impedance and emission will be discussed considering the commercially available equipment. Discussing the advantages and limitations of commercial devices for grid emission measurement, a customized data acquisition device will be introduced. A publicly available database of the grid behavior data will be introduced and how to translate the data for possible studies will be discussed. Next, the time-frequency analysis of the obtained data for both grid emission and impedance will be introduced. The suitability of standard AMN/LISN with respect to the real grid impedance behavior and its consequence on the expected EMI of a power converter will be addressed.
9:45am - 10:15am
Power Converter Noise Propagation Path Modeling
Pooya Davari, Abduselam Beshir Hamid
Aalborg University, Denmark
In this part a comprehensive modeling approach to estimate both differential mode and common mode of power electronic converter will be discussed. The importance of closed loop control on the power converter impedance and its effect on low frequency resonance and stability will be addressed. Moreover, the role of parasitic specifically in the supraharmonics frequency range will be highlighted through a couple of case studies. Finally, a black-box modeling strategy for both single-phase and three-phase converter from EMI model extraction of a power converter will be addressed.
