Modélisation haute fréquence des convertisseurs d'énergie : application à l'étude des émissions conduites vers le réseau

Abstract : These research works focus on EMC (Electromagnetic Compatibility) in power electronics systems. Specifically, the study focuses on HF (high frequency) modeling of the power converters in order to study the conducted emissions toward the power grids with or without the use of an LISN (Line Impedance Stabilisation Network). The first part presents the modeling tools of the electromagnetic emissions sources in power converters.The second part describes the HF modeling method of an adjustable speed drive (ASD) that will be used to estimate the conducted emissions. In a first part, a behavioural model of PWM inverter is proposed as an EMI noise source. Then, a model of the shielded 4-wire energy cable that taking into account of the dissymmetry structure is proposed and validated in the frequency domain for two different lengths. The comparison of measurement and simulation results of conducted emissions (with LISN) shows the good compromise between the simulation duration and accuracy of the results.A third part is dedicated to the propagation of conducted emissions toward the power grid without using a LISN. The first stage consists in proposing a model impedance of the network impedance. The influence of the bridge rectifier diodes on the propagation paths of common mode disturbances has been studied in the second step. The simulation results show that the impact of these disturbances on the network voltage is more important when the bridge rectifier is normally off-state. The experimental results have validated this study. This work concludes with a preliminary study on the association of two converters connected locally to a single energy source
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Engineering Sciences [physics]. Ecole Centrale de Lille, 2009. French. <NNT : 2009ECLI0026>


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Maxime Moreau. Modélisation haute fréquence des convertisseurs d'énergie : application à l'étude des émissions conduites vers le réseau. Engineering Sciences [physics]. Ecole Centrale de Lille, 2009. French. <NNT : 2009ECLI0026>. <tel-00579671>

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