Search results for "LET"

showing 10 items of 23489 documents

Simulation of a Power Line Communication System in Medium and Low Voltage Distribution Networks

2011

The aim of the paper is to study the influence of the power transformer on signal transmission in the case of a power line communication (PLC) system in a overhead Medium Voltage (MV) power network. A model of the PLC system was carried out by means of the Simulink® software. A distributed parameter MV overhead line, two power transformers, the signal coupling networks and the receiving and transmitting line coupling interface of a ST7540 FSK powerline transceiver were included in the model. The performances of the complete PLC communication system are evaluated for different line lengths by means of the attenuation computed as ratio between the received and transmitted voltage signals.

power line communicationEngineeringbusiness.industryElectrical engineeringpower transformerCommunications systemSignalLine (electrical engineering)overhead linepower system communicationPower-line communicationmedium voltagemedium voltage communication system power system communication overhead line communication equipment testing power line communication attenuationElectronic engineeringOverhead (computing)communication systembusinessLow voltageSettore ING-INF/07 - Misure Elettriche E ElettronicheOverhead lineattenuationcommunication equipment testingVoltage
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Measurement and communication interfaces for distributed generation in smart grids

2013

The aim of this work is to perform a feasibility study on the measurement and communication strategies for the development of a new generation of interface devices for distributed generators and their integration on smart grids. The communication system can use one or more technologies, at the various levels, creating a low cost network infrastructure, in the framework of a SCADA (Supervisory Control and Data Acquisition) architecture. As regards the measurements, the attention is focused on the anti-islanding protection, based on a hybrid solution, which makes use of local measurements and communications with the grid, at both MV and LV level by employing the PLC technology. Some simulatio…

power line communicationEngineeringdistributed generationbusiness.industrydistributed generation interface devices smart grids power system communications power line communication islanding detectionInterface (computing)Programmable logic controllerCommunications systemGridpower system communicationsinterface devicesSmart gridSCADAEmbedded systemDistributed generationsmart grids.islanding detectionArchitecturebusinessSettore ING-INF/07 - Misure Elettriche E Elettroniche
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An interface protection system with power line communication for distributed generators remote control

2014

The aim of this work is to present a narrow band power line communication (NB-PLC) interface protection system (IPS) for distributed generators (DGs); it has been developed according to the current standard CEI 0-21 and the requirements for smart grid applications. For such applications, the new IPSs have to implement new intelligent functions such as remote monitoring and control of DGs and Energy Storage Systems (ESSs) inverters, not only in terms of disconnection but also of voltage regulation and power modulation by the utility control. The main feature of the developed IPS is the ability to interact with both the grid and the DG's and ESS's inverters. In fact, it can communicate with t…

power line communicationEngineeringdistributed generationbusiness.industryinterface protection systemsRemote monitoring and controlpower system communicationsPower-line communicationSmart gridDistributed generationsmart gridsdistributed generation interface protection systems smart grids power system communications power line communication islanding detectionGrid-connected photovoltaic power systemElectronic engineeringislanding detectionVoltage regulationbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheModbusPower control2014 IEEE International Workshop on Applied Measurements for Power Systems Proceedings (AMPS)
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Innovative Solutions for the Integration of Renewable Energies on Tunisian and Sicilian Electrical Grids

2022

The rapid spread of distributed generation from renewable energy sources, combined with their unpredictable behavior, requires the continuous monitoring and control by the Distribution System Operator, in order to guarantee the stability and efficiency of the distribution network. Thus, in this paper a new measurement and communication architecture is proposed, which foresees the use of innovative devices and different technology-oriented solutions, even redundant ones, which allows the transition from passive to active electricity distribution network, with minimal structural changes. The architecture has been developed in the framework of the SInERT project (Italy-Tunisia cross-border coo…

power line communicationPower system communicationsmart gridsCommunication signalcommunication systemspower system measurementsSettore ING-INF/07 - Misure Elettriche E Elettroniche
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Sviluppo di dispositivi elettronici di misura innovativi per la gestione delle Smart Grid attraverso un'opportuna infrastruttura di comunicazione

2014

power line communicationSettore ING-INF/03 - Telecomunicazionisistemi di comunicazioneSmart Griddispositivi elettronici di misuraSettore ING-INF/07 - Misure Elettriche E Elettronichegenerazione distribuitadispositivi di interfacciaanalisi armonica
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On the model of MV power line communication system in the case of line to line transmission

2009

power line communicationSettore ING-INF/07 - Misure Elettriche E Elettroniche
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A Medium Voltage Cables Model for Power Line Communication

2009

The aim of this paper is the development of a theoretical model of medium-voltage (MV) cables in the frequency range of 25-200 kHz, which can be easily implemented in the Simulink environment. Two transmission-line configurations: 1) line-ground and 2) line-line were considered. The model requires the knowledge of the transmission channel parameters in the frequency domain. Thus, a characterization of MV cables in the two transmission-line configurations by means of experimental measurements was performed on commonly used MV cables, RG7H1R, of different sections, 95 mm2 and 185 mm2 with an aluminum core and copper shielded. To validate the model, a comparison between the attenuation constan…

power line communicationSettore ING-INF/07 - Misure Elettriche E Elettroniche
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STUDIO, PROGETTAZIONE E REALIZZAZIONE DI SISTEMI DI MISURA, DI CONTROLLO E DI COMUNICAZIONE DEDICATI ALLE SMART GRIDS

L’attività di ricerca descritta nella presente tesi di dottorato si inquadra nell’ambito dello sviluppo di nuove tecnologie e sistemi di misura di tipo distribuito per la gestione delle smart grids, il miglioramento dei livelli di power quality e l’integrazione della generazione distribuita (GD) e dei sistemi di accumulo (SA) da fonti di energia rinnovabili nelle reti di distribuzione. In particolare, la crescente presenza di GD nelle reti a media e bassa tensione (MT/BT) crea possibili criticità per la protezione e l’automazione della rete, la qualità del servizio, la regolazione di tensione, etc. Nello specifico nascono diverse problematiche quali variazioni di tensione e di frequenza, pr…

power line communicationmisure di power qualitySmart gridsistemi di misura distribuitiSettore ING-INF/07 - Misure Elettriche E Elettronichesmart metering
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An Innovative Power Line Communication solution For Medium Voltage Smart Grids Applications

2018

This paper summarizes the authors research activity concerning the design, modeling and experimental characterization of a new coupling system for medium voltage (MV) narrow band power line communications (NB-PLC). The proposed solution has been patented by authors and it exploits the capacitive divider of voltage detecting systems (VDSs) normally used to reveal the mains voltage presence, thus avoiding the use of dedicated MV couplers. In the following, the modeling of the VDS capacitive divider is presented and the interface card design is described, based on simulation of the whole PLC transmission channel. Laboratory tests are also presented. Finally, the results are shown of an on-fiel…

power line communicationspower system measurementcommunication system performancePower system communicationsmart gridnarrow band power line communicationSettore ING-INF/07 - Misure Elettriche E Elettronichecommunication equipment testing
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Harmonic sources detection in power systems via nonactive power measurements according to IEEE Std. 1459-2010: theoretical approach and experimental …

2010

In this paper an enhanced decision-making strategy is presented for the detection of harmonic sources in power systems able to detect also which is the prevailing nature of the disturbance (nonlinearity or unbalance). It makes use of some simple indices, which are evaluated by means of the measurements of some nonactive power quantities, proposed by the authors and derived from the approach of the IEEE Std. 1459-2010. The decision-making rules for the proposed strategy are presented and discussed by means of simulation and experimental tests. The results obtained are presented, showing the effectiveness of the proposed strategy for the detection of the dominant harmonic source upstream or d…

power measurement harmonic distortion power definitions IEEE Std. 1459-2010 harmonic sourcesSettore ING-INF/07 - Misure Elettriche E Elettroniche
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