Rio de Janeiro, Brazil
Rio de Janeiro, Brazil

Time filter

Source Type

Pellini E.L.,University of Sao Paulo | Senger E.C.,University of Sao Paulo | Manassero Jr. G.,University of Sao Paulo | Reis Filho F.,University of Sao Paulo | Rufato Jr. E.,COPEL
IET Conference Publications | Year: 2013

This article presents the development of a custom Intelligent Electronic Device (IED) for distribution feeder recloser protection and automation. The IED was designed according to specific requirements of the overhead distribution networks from the Brazilian electric utility COPEL. The project aims to create a modular hardware and software solution, that could fit the todaỳs utility needs of a multifunctional device, such as a high-impedance protection function, and also future capabilities, in order to fit the newest Smart Grids scenarios of COPEL.


Ruffato Jr. E.,COPEL | Sakurai C.,University of Sao Paulo | Pereira V.,University of Sao Paulo
IET Conference Publications | Year: 2013

In Brazil, SHP (Small Hydroelectric Plant) has been used as alternative to generate cleaner and renewable energy. These small power plants are between 1 and 30 MW and are located in rural areas. The SHP should be supervised from an OCC (Operational Control Centre) located, usually, at one substation. For that, several data communication technologies can be used as: Leased Line, Private Line, GPRS (General Packet Radio Service), among others. This paper presents the study how the PLC can be used as alternative service for monitoring and control of SHP, describing the functional and nonfunctional requirements to be met to the PLC specification. In addition, the paper focuses attention on the new strategies required for controlling and monitoring at Smart Grids and shows how PLC could have a key role among the technologies that can be applied.


Manassero Jr. G.,University of Sao Paulo | Yoshida E.S.,Schneider Electric | Senger E.C.,University of Sao Paulo | Pellini E.L.,University of Sao Paulo | Koehler M.,COPEL
IET Conference Publications | Year: 2013

This paper presents the development, implementation, simulation results and field tests of an automated digital fault recording analysis system. The proposed system, which is based on measurements provided by intelligent electronic devices (IEDs) installed at the substation level and/or along the electrical networks, is capable of evaluating the behaviour of protection systems, the performance of the networks under faults and power quality events. It consists of five software modules and a humanmachine interface responsible for: reading voltage and current signals stored in COMTRADE sets of files [1], [2]; filtering the direct current (DC) decaying component of the current signals; estimating the phasor quantities and identifying the transition instants of these signals; estimating the network's state; and presenting the results. The system is installed in "Companhia Paranaense de Energia" , one of the largest Brazilian G,T&D utility [3], and it is under evaluation.


Neto J.X.V.,LACTEC | Quadros R.C.,LACTEC | Dos Santos Coelho L.,Federal University of Paraná | Fedalto L.,LACTEC | Procopiak L.A.J.,COPEL
European Wind Energy Conference and Exhibition 2012, EWEC 2012 | Year: 2012

The design process of a wind turbine blade can be divided into two steps: aerodynamic design and structural design, both of which can be seen as optimization problems. Recently, as an alternative to the conventional mathematical approaches, modern meta-heuristic optimization techniques have been given much attention by many researchers due to their ability to find an almost global optimal solution in optimization problems. Research on merging evolutionary computation and quantum computation has been started since late 1990. This paper presents the Quantum-inspired Evolutionary Algorithm (QEA) applied to the aerodynamic design optimization of a wind turbine blade through the Blade Element Momentum (BEM) theory. QEA is inspired on the multiple universes concept of quantum physics, and allows the optimization process to perform with fewer evaluations of solutions than other evolutionary algorithms. In the case study, it was considered a blade with a 40 m radius, using the NACA 4415 airfoil (from the National Advisory Committee for Aeronautics - NACA), under a given operating point, and taking into account tip losses and Glauert correction. The results were satisfactory, since the rotor optimized by QEA showed higher power generation than the rotor optimized by Schmitz theory.


Leal L.,COPEL | Biondi D.,Federal University of Paraná | Batista A.C.,Federal University of Paraná
Floresta | Year: 2014

Whereas the distribution of urban forests and zoning land use influence the climate of Curitiba city, this research aimed to analyze the effect of this factors in temporal and spatial variation of air temperature in this town. Temperature data were collected in four campaigns in periods corresponding to the seasons of the year in 2011, in 44 monitoring points in four transects in the urban mesh by mini-shields meteorological model with Hobo® loggers. In the four transects were found differences between the thermal monitoring points in the analyzed periods. For the absolute maximum temperature, differences were up to 5.8 °C in the northeast-southwest transect and the absolute minimum temperature of 4.6 °C in the northeast-southwest transect. Even in seasons of lower temperatures, autumn and winter, thermal differences were related to anthropogenic heat. The highest temperatures were found in the regions with greater intensity of occupation and human activities, however not in the areas with verticalization, while the lowest temperatures were observed in regions with higher permeable areas, concentration of remaining forest and public green spaces. As result, it confirms the influence of building density and the presence of vegetation in the variation of temperature in the city of Curitiba.


Costa M.M.,Eletrobras | Carvalho J.C.D.,Eletrobras | Dahlke D.B.,LACTEC | Santos P.H.M.,COPEL
2011 IEEE International Workshop on Applied Measurements for Power Systems, AMPS 2011 - Proceedings | Year: 2011

This paper presents a solution for high voltage current transformers onsite errors verification, using a system composed by an optical current sensor as reference standard, suitable for live line installation up to 550 kV. The system is described; its performance results are presented, as well as field applications and results. Some limitations that have to be overcome to obtain a reasonable measurement uncertainty are also discussed. © 2011 IEEE.


Pereira J.A.,COPEL | Canciglieri Junior O.,PUCPR | Lazzaretti A.E.,LACTEC | de Souza M.P.,COPEL
Advanced Materials Research | Year: 2014

The R&D Program of the Brazilian Electricity Sector has recently begun to encourage the newly developed technologies transference to market through R&D projects. However, the lack of adequate methodological references for project planning led the authors to propose a model to assist the energy utilities and research teams in the elaboration of R&D projects proposals for the electricity sector. In this context, this paper presents a case study of the Integrated Product Development Model Oriented for R&D Projects of the Brazilian Electricity Sector (MOR&D) application to elaborate a project of pioneer lot for a newly developed of a safety equipment with the incentives of the R&D Program, showing that, as in industry, a well-structured model may be the way to generate innovative projects and products, meeting completely the guidelines that all electric utilities are subject. © (2014) Trans Tech Publications, Switzerland.


Dutra C.A.,Reason Tecnologia S.A. | Cruz I.H.,Reason Tecnologia S.A. | Franzen T.A.,Reason Tecnologia S.A. | Matos R.R.,Reason Tecnologia S.A. | And 3 more authors.
IET Conference Publications | Year: 2014

This paper presents the recent progress in use the sampled measured values (SV) as described in IEC 61850-9-2 and IEC 61869. This protocol is used to replace the copper cabling for digital communication network in bringing the current and voltage measurement for protection and control substation systems. The technology is implemented through equipment called merging unit, which digitizes the analogue measurements and encapsulate the information in proper network packets. The progress in the implementation of IEC 61850 SV is corroborated by the excellent results when comparing analogue measurements between merging units and conventional acquisition systems, as presented in this work. In chapter 2, tests are carried out by comparing the standard and SV approach using a DFR. Chapter 3 and 4 include a protection relay in the tests to compare protection actuation using the two systems. Finally, chapter 5 presents results of a field application of merging units in real power system substation. In conclusion, the results and sources of error are analysed and validated.


Cruz G.K.,UEPG | Kopp F.M.,COPEL | Viatroski M.A.,UEPG | Novatski A.,UEPG | And 4 more authors.
Journal of Luminescence | Year: 2010

In this paper we report the upconversion emission for the 4S3/2→4I15/2 Stark components of Er3+ ion-doped fluorozirconate glass at T=2 K. The spectrum shows only seven peaks, one less than expected theoretically, being missing the peak at the wave number 17,996 cm-1 (λ=555 nm). This result is compared with the luminescence for the same transition at the same conditions which exhibits the eight expected lines. Such a discrepancy is attributed to a re-absorption process (ESRA) between the energy levels 4I13/2 and 2H9/2. © 2009 Elsevier B.V. All rights reserved.


Hamerschmidt M.B.,COPEL | Demonti R.,LACTEC
IET Conference Publications | Year: 2013

This paper describes the characteristics of the Brazilian energy distribution market. A simulation of cost / impact due to a roll out of smart meters is preformed based on market values. The results show a significant increase in the rates to pay for the necessary investments. The paper also outlines a structure that enables the reduction of implementation costs by focusing of the expected benefits for the Brazilian reality.

Loading COPEL collaborators
Loading COPEL collaborators