Caroline Leroi
PhD student
Ir. at UCL in 2014

Main project: Conducted disturbances in the frequency range 2-150 kHz
Funding: assistante au cadre
Supervisor(s): Emmanuel De Jaeger

During last decades, the power grid has changed significantly. The main among various causes of this change is the increasing number of devices using power electronics. These devices include switches with frequency commutation located between 2kHz and 150kHz. Besides the Power Line Carrier (PLC) which is a means of communication using the existing power network works also in this frequency range. Therefore, there is a coexistence of intentional and unintentional emissions in this frequency band while the standardization which is supposed to regulate the emission of the disturbances and the immunity of sensitive devices is currently almost non-existent for this frequency band.

In this context, the aim of this PhD thesis is to contribute to a better understanding of the origin, the propagation and the impact of the disturbances in the frequency range 2-150 kHz. It is important to gather knowledge in order to set appropriate limits in the standards.

Several observations have already been made through measurements in the litterature. However, there is a lack of theoretical explanation. In this thesis, models of disturbances sources are developed as well as models of grid components. These models will allow us to study the propagation and to understand which parameters influence the level of disturbances.

Models are developed in Matlab Simulink environment and more specifically with the SimPowerSystems toolbox. Results will also be validated through experiments.

IMMC main research direction(s):

electrical power systems quality
eletric energy systems

Research group(s): MEED


Recent publications

See complete list of publications

Journal Articles

1. Duponcheel, Matthieu; Leroi, Caroline; Zeoli, Stephanie; Winckelmans, Grégoire; Bricteux, Laurent; De Jaeger, Emmanuel; Chatelain, Philippe. Investigation of the complete power conversion chain for small vertical- and horizontal-axis wind turbines in turbulent winds. In: Journal of Physics: Conference Series, Vol. 1037, no.1037, p. 072046 (2018). doi:10.1088/1742-6596/1037/7/072046.

Conference Papers

1. Leroi, Caroline; De Jaeger, Emmanuel; Cassano, Stefano. Modeling of harmonic propagation of fast DC EV charging station in a Low Voltage network.

2. Leroi, Caroline; De Jaeger, Emmanuel. Modelling of harmonics produced by Compact Fluorescent Lamps in the frequency range 2-150 kHz.

3. Leroi, Caroline; De Jaeger, Emmanuel; Bekemans, Marc. Harmonic disturbances up to 150 KHZ produced by small wind turbines on the LV distribution grid.

4. Leroi, Caroline; De Jaeger, Emmanuel. Conducted disturbances in the frequency range 2–150 kHz: influence of the LV distribution grids.