Exchange Platform

Author: h.gras
Type: Example
Downloaded: 123 times
Date: 2022-11-14

Arc furnace and flicker meter

Description:
Three phase arc furnace model was developed according to CEA’s measure campaign. Flicker meter model was based on flicker meter UIE standard, it reports the values
of flicker sensation, Ifl, an... see mored short-term flicker severity, Pst.

Tag(s): arc, furnace, flicker, CEA, fluctuation, UIE, chaotic

Author: e.malaval
Type: Model
Downloaded: 61 times
Date: 2022-01-19

Frequency analyser

Description:
This device measures in real-time the frequency and its variation.

Tag(s): frequency, measure

Author: e.malaval
Type: Model
Downloaded: 49 times
Date: 2021-11-30

DC component suppressor

Description:
This model suppresses the DC component in the measure of a fault current to keep only the permanent part.

Tag(s): fault, converter, filter, current

Author: thpapad
Type: Document
Downloaded: 124 times
Date: 2017-11-03

MIMO-OFDM Narrowband-PLC in Distribution Systems: Impact of Power Transformers on Achievable Data Rates

Description:
Power-line communication (PLC) is gaining a renewed interest, due to the smart grid (SG) emerging communication requirements. Among other communication technologies, PLC is a very efficient and feasib... see morele solution, especially for the extended SG distribution networks. However, it is very challenging to consider both the medium- and low-voltage parts of the distribution network as a whole communication medium, due to the attenuating effects of distribution transformers, limiting PLC applicability. In this paper, data transmission through distribution transformers is investigated by means of multiple-input multiple-output (MIMO) narrowband power-line communication (NB-PLC) system, utilizing orthogonal frequency-division multiplexing (OFDM) technology. Multi-conductor distribution line and measurement-based transformer models are developed to characterize the MV-LV PLC channel. In addition, OFDM signal processing techniques are applied to enhance the achievable data rates. The transmit power budget and bit allocation across the OFDM sub-channels of the spatial beams are optimized to maximize the data rate through the distribution transformer. The achievable data rates are calculated and systematically analysed for different scenarios to investigate the effects of the distribution lines, connected loads, noise models, etc. Results reveal the superiority of the proposed MIMO design against the traditional SISO systems. In addition, the possibility for an extensive and reliable application of MV-LV PLC communications through distribution transformers is shown.

Tag(s): Distribution lines, distribution transformers, MIMO-OFDM, power-line communication, smart grids

Author: n.sene
Type: Publication
Date: 2015-04-02

Power system islands, autonomous microgrids and relevant instrumentation

Description:
Unplanned power system islanding is usually seen as a major risky operating condition and specific countermeasures are applied in order to avoid it. However the capability of voluntary disconnection f... see morerom the external grid and autonomous operation is often a requirement for some industrial power systems and power plants. The panel session at the 2012 IEEE Innovative Smart Grid Technologies Conference on
“Power system islands, autonomous microgrids and relevant instrumentation” aims at providing an occasion to exchange ideas and experiences in order to envisage situations in which voluntary power system islanding may be useful and to define the instrumentation required for a reliable operation in islanded conditions. This paper, provided by the organizers, reviews some activities recently carried out on this topic at their institution.

Authors: A. Borghetti, L. Peretto

Tag(s): Power systems islanding, microgrids, measurements.