Étude et développement d'un convertisseur réversible adapté aux applications HEMS

International audienceÉtude et développement d'un convertisseur réversible adapté aux applications HEM

AMELIORATION DE DEBIT CPL AVEC FILTRAGE ET ETUDE D'IMPEDANCE

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Chapter 5 - Making Inverters for Domestic Photovoltaic Applications More Robust: The Relevance of a Mixed 5-level Topology

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A New Method For Input Installation Impedance Measurement

International audienceThe access impedance for Narrowband PLC communication is dependent of the global installation impedance. The interest of this paper is to measure the domestic installation impedance using a new setup based on an LCL filter for masking the network impedance. The short-time and the frequency variation of the global impedance in the frequency band between 30 and 500 kHz is measured in several scenarios. The domestic loads are classified according to their impact on the global installation impedance by connecting to the installation and changing the mode of operation. The access impedance is recalculated using the measured installation impedance in parallel to the network

DEVELOPPEMENT D’UNE METHODE DE MESURE DE L’IMPEDANCE GLOBALE D’UNE INSTALLATION POUR LA TRANSMISSION CPL

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Multipath Model Simulator Exploiting a Topology Reconstruction Method for PLC Home Networks

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Characterization of Narrowband Noise and Channel Capacity for Powerline Communication in France

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Characterization of Narrowband Noise and Channel Capacity for Powerline Communication in France

Narrowband powerline communication (NB-PLC) systems represent a key step for the real development of smart grids’ applications in the medium voltage (MV) and low voltage (LV) networks. This article sums up the results of a complete experimental measurement campaign aimed at investigating the low voltage NB-PLC channel in the frequency range from 9 to 500 kHz in various sites (i.e., rural, urban etc.) located in France. The noise features in time-frequency representation are studied at five different sites between the transformer substation and the smart electricity meter. The main contribution of this study consists in estimating the theoretical channel capacity which constitutes a major interest for the users and actors of the electrical system. The channel capacity calculation shows reliable results in the US Federal Communications Commission (FCC) band (a few Mbits/s). The quality of the communication in the FCC band enables to integrate new smart grids’ applications and services based on the existing NB-PLC communication for advanced metering infrastructure (AMI)

Modélisation du canal CPL et calcul de fonction de transfert

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A Bidirectional Grid-Connected DC–AC Converter for Autonomous and Intelligent Electricity Storage in the Residential Sector

International audienceControlling the cost of electricity consumption remains a major concern, particularly in the resi-dential sector. Smart home electricity management systems (HEMS) are becoming increasingly popular for providing uninterrupted power and improved power quality, as well as for reducing the cost of electricity consumption. When power transfer is required between a storage system and the AC grid, and vice versa, such a HEMS requires the use of a bidirectional DC-AC converter. This paper emphasizes the potential value of an almost unexplored topology whose design is based on the generation of sinusoidal signals from sinusoidal half waves. A DC-DC stage, which behaves as a configurable voltage source, is in series with a DC-AC stage, i.e., an H-bridge, to achieve an architecture that can operate in both grid and off-grid configurations. Wide bandgap power switches (silicon carbide MOSFETs), combined with appropriate control strategies, are the keys to increasing compactness of the converter while ensuring good performance, especially in terms of efficiency. The converter is configured to automatically change the operating mode i.e., inverter or rectifier in power factor correction mode, according to an instruction issued by the HEMS; the latter being integrated in the control circuit with automatic duty cycle management. Therefore, the HEMS sets the amount of energy, to be injected into the grid or stored. The ex-perimental results validate the operating modes of the proposed converter and demonstrate the relevance of such a topology when combined with a HEMS, especially in the case of an AC grid connection. Efficiency measurements of the bidirectional DC-AC converter, performed in grid-connected inverter mode, show that we exceed the efficiency target of 95% over the entire output power range studied, i.e., from 100 W to 1.5 kW