A Hybrid Fault Current Limiter (HFCL) is a device that combines the properties of both Superconducting (SFCL) and Solid-State (SSFCL). This combination aims to provide fast response time typically associated with SFCLs simultaneously capacity withstand longer limitation reliable application under high voltages, as found in SSFCLs. In this context, an HFCL prototype was tested analyze its performance compare characteristics those SFCL SSFCL modules separately. work demonstrate presents level...

Abstract Power systems are becoming more interconnected and complex. The distributed generation expands spreads across the grids, reducing distance between load generation. In addition, several substations aging after decades of operation their equipment struggle to sustain ever increasing fault levels. this context, current limiter (FCL) arrived as a solution mitigate problem. Considering FCL devices, resistive superconducting (R-SFCL) is most mature technology with potential be produced in...

It is known that the light emitting diode lamps have taken space in residential, commercial and industrial lighting systems. This occurs because of its high cost being reduced over years. Furthermore, it also possible to observe an increase efficiency them, bearing fluorescent incandescent disuse. study follows proposes how changing bulbs can influence, terms power quality, system. Therefore, this based on measurements total harmonic distortion currents generated by groups analyse evolution...

With increased demand, it is often necessary to increase the power supplied or insert new points of generation in distribution network. However, short-circuit levels may network, which requires simulating these conditions robust and reliable software. This paper shows a comparison between results obtained by two specific software for electric networks: Open Distribution System Simulator (OpenDSS) Alternative Transients Program (ATP). The simulated model considers data from real system,...

This paper presents the implementation of a simple model resistive Superconducting Fault Current Limiters (r-ScFCL) based on High Temperature Superconductor (HTS) in software ATP/EMTP for different transient conditions appearing distribution networks. The use fault current limiters (FCL) is rather appealing since they can provide reduction short-circuit levels during faults while consuming negligible power nominal regime. Thus far, lot efforts have been dedicated to design equipment and...

Since high-temperature superconductors were discovered, the potential of applications Superconducting Fault Current Limiters (LCCS) in Power Systems has been increasing. However, it's necessary to understand how these devices will perform and impact network, order specify them correctly. This paper shows a proposal computational model made using free software Alternative Transient Program (ATP), which allows simulation LCCS equivalent circuits real power systems. The considers electrical...

Fault current limiters are essential devices used to protect the power system and its equipment against high levels of fault current, which growing up due increase new sources. This paper proposes a novel design Hybrid Superconducting Current Limiter (Hybrid SFCL), is composed basically by thyristors in series with superconducting element. branch connected parallel an air-core reactor, improves limitation ensures safe operation superconductor Another advantage this topology use voltage drop...

This article presents the results of a simulation electrical system "Corveta Classe Barroso" or CCB, ship in Brazilian Navy, using MATLAB program.The objective is to measure, evaluate, and mitigate harmonics at output terminals ship's generator group, driven by non-linear loads connected Point Common Coupling (PCC) distribution system, such as three-phase Static Rectifiers, Specific Loads, Water-Cooling Unit.The was divided into two stages, with first stage simulating without presence Shunt...

MMC converters have significant advantages over conventional LCC used in HVDC transmission systems. They are a promising technology for modern power systems where greater control and operational flexibility during network disturbances required. In this work, brief theoretical foundation was developed regarding multi-level modular converter high-voltage direct current (MMC-HVDC). Additionally, sensitivity analysis conducted on an MMC-HVDC link connected to large-scale system with...

Partindo da alegoria de Steven Spielberg em seu filme Minority Report, procuramos abordar a nova faceta do arranjo razão estado & mídia na composição uma cidade planetária pós-moderna, hiperindividualizada pela lógica consumo imagens e sentidos, problematizamos os compostos subjetivos que parecem emergir neste cenário.

No presente artigo, procuramos discutir a noção de contra-acontecimento utilizada por Jean Baudrillard ao avaliar Guerra do Golfo, 1991 e 2003, assim como caráter virtual dos acontecimentos meteóricos promovidos no espaço nossa sociedade informacional - isto tática dissuasão toda qualquer forma alteridade inscrita presente.

With the growing demand for electricity, there is an expansion of distribution network, with insertion new elements (capacitor bank, motors, etc.) and even energy sources such as distributed generation. Such insertions can intensify transient electromagnetic current phenomena in these networks, short circuits, motor starting energizing transformers capacitor banks, being necessary analyzes to evaluate events, well take action mitigate/eliminate high currents. One promising alternatives use...