Volt/VAR control (VVC) techniques may be used for purposes such as technical loss reduction, voltage profile improvement, and conservation reduction. The advent of distributed energy resources (DERs) at distribution consumer levels imposes imperative VVC challenges the network operator. Innovative approaches have been proposed to use inherent thermal inertia buildings provide ancillary services grid tackle problems posed by increasing trend volatile DERs. Numerous state-of-the-art strategies...

Current energy policies are encouraging the connection of power generation based on low-polluting technologies, mainly those using renewable sources to distribution networks. The photovoltaic (PV) systems have experienced a great growth around word in last years. Hence, it becomes increasingly important understand technical challenges, facing high penetration PV at grid, especially considering effects intermittence this source quality, reliability and stability electric system. In another...

This paper presents a comparison between tubular fluorescent lamp connected to an electronic ballast and subsequently electromagnetic LED, through the prism of power quality. It is intended show that replacement lamps LED may have large difference with respect energy consumption, since luminous efficiency evaluated about 23% higher compared lamp. However, there are some disadvantages associated use these types for lighting buildings, such as generation harmonic current can compromise proper...

The ATP-EMTP has become a reference program for electromagnetic transients computer simulations. Due to the contributions of its officer's users groups spread around world, several improvements were made and additional resources have been developed facilitate expand application. Tools, like ATPDraw, PlotXY, TACS, DBM MODELS, can drive enable excelent research studies which may result in internationally renowned scientific papers field Electrical Systems. It is then presented this paper an...

The search for the reduction of energy consumption has encouraged development more efficient electrical equipment. In this context are inserted LED (lighting emitting diode) lamps that since its discovery been enhanced different lighting applications, such as interior uses so-called Power LEDs in arrangements tubular lamps. With bulk insert market, become indispensable studies related to these with regard power quality, efficiency and economic feasibility. This paper intends model...

The quantum internet promises to extend entanglement correlations from nearby neighbors any two nodes in a network. How efficiently distribute over large-scale networks is still an open problem that greatly depends on the technology considered. In this work, we consider composed of photonic channels characterized by trade-off between generation rate and fidelity. For such look at following problems: one finding best path connect given network bipartite routing, starting node order three...

The advent of distributed energy resources (DERs) at the distribution and consumer level imposes imperative operation challenges for utilities. Novel strategies have been proposed to use thermal inertia buildings provide ancillary services grid tackle problems posed by increasing penetration renewable sources. Synthetic control storage systems (ESS) improve transient stability with increased aforementioned deal frequency only consider modulation active power loads or ESS don't voltage...

The objective of this paper is to analyze the replacement conventional air conditioner for driven by frequency converter in a Consumer Unit (CU) used public service activities, which carries addition increased energy efficiency, positive impact on invoice electric power CU. However, when observing effects use quality systems where they are employed, verified appearance unwanted harmonic distortion network. This analyzes process replacing proposed system and verifies reduction consumption quality.

This study aims to analyze the performance under distribution networks, technically comparing so called conventional network (with bare cables) with those compact covered cables). In old lines cables has been used due fact that its installation cost is cheaper than ones. But nowadays almost of companies started feasibility because benefits regarding maintenance and reduction outages. Therefore, this research technical losses networks when compared networks. For purpose, electrical conductors...

This article proposes the use of a three-phase induction generator (IG), connected through single-phase connection (Fukami configuration), to be used as rotating exciter for synchronous generators. proposal aims at presenting an alternative replace permanent magnet generators (PMGs) in exciters (SGs). In order obtain results, six-pole IG and four-pole SG were used, DC motor (DCM) was employed primary machine, speed control aforementioned machine is presented described this work. To carry out...