Curitiba, Brazil
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Gabriel J.D.,LACTEC | Wagner R.,LACTEC | Zambenedetti V.C.,PUC PR University | Gules R.,UTFPR University | And 2 more authors.
2013 IEEE PES Conference on Innovative Smart Grid Technologies, ISGT LA 2013 | Year: 2013

Due to the expected increase in Distributed Generation-DG-connected to the mains from consuming units, the utilities are concerned about problems that may arise in the electrical system and the need to control that. In this scenario, it was proposed the development of protective equipment for connecting DG on the electricity system integrated with smart grid. The functional requirements of the equipment were defined based on standards, articles addressing the problems arising from the installation of DG in distribution system and computer simulations. The hardware was developed based on the OMAP-L138 processor and the communication was implemented through a mesh network with ZigBee protocol, which is already installed for testing in some sections of the distribution system. This paper shows some concerns about the future electricity networks and proposes a system based on smart grids for protection and automation of distribution network with DG. © 2013 IEEE.

Lazzaretti A.E.,LACTEC | Toledo L.F.R.B.,LACTEC | Alberti E.,Elejor | Rocha R.P.O.,LACTEC | Swinka-Filho V.,LACTEC
Proceedings of 22nd International Conference on Plastical Optical Fibers, POF 2013 | Year: 2013

This paper describes the development of an optical system for on-line thermal monitoring of stator bus-bar of hydrogenerators using distributed temperature sensor. Also, this paper describes the tests performed in the DTS systems to ensure the detection of stator failures and carried on the bus-bar hydrogenerator head. Furthermore there is shown a method of fixing the optical fiber generator.

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.

Bianchin C.G.,LACTEC | Demonti R.,LACTEC | De Almeida A.R.,LACTEC | Da Silva Filho M.T.,COPEL Distribuicao S.A. | Da Silva Pinto C.L.,COPEL Distribuicao S.A.
Proceedings of the IEEE Power Engineering Society Transmission and Distribution Conference | Year: 2012

This paper presents the updated results on research for development of a static switch for operation in medium voltage. It shows the results of the algorithm that detects an outage and enables the digital processing to control the static switch. This algorithm was based on the Clarke and Park transforms. The operation of the switch consists of transferring the power supply from the main source, where an outage occurred, to an alternative power source (backup). The load stays off for a time of milliseconds. A low voltage prototype was built, to allow the evaluation of the algorithm. Then a prototype of the static switch was built in voltage of 13,8kV. The first tests - feeding resistive load - are presented in voltage of 13.8 kV. © 2012 IEEE.

Lazzaretti A.E.,LACTEC | Ravaglio M.A.,LACTEC | Toledo L.F.R.B.,LACTEC | Teixeira J.A.,LACTEC | And 2 more authors.
2011 International Symposium on Lightning Protection, XI SIPDA 2011 | Year: 2011

This paper presents the development of an automatic system designed to measure fast electromagnetic transients on energized distribution network on both, medium and low voltage circuits. The four developed systems were installed on class 15 kV feeders. The feeders were chosen according to the flash lightning density levels of the region. Besides the constructive details of the develop system, the paper shows the main results achieved. © 2011 IEEE.

2013 IEEE PES Conference on Innovative Smart Grid Technologies, ISGT LA 2013 | Year: 2013

The presence of electricity in various sectors of the economy allowed it to reach a level of importance, in which its rational consumption has become essential to maintain and increase its offer. This requires solutions (as mobile applications) that enable the costumer to know their instantaneous consumption and act on it. This paper presents methods for monitoring and controlling the energy consumption, which supported the development of an Android application (for mobile devices) to interact with a Smart Grid Network. It proposes methods for daily, weekly and monthly analysis, establishment of targets of energy consumption or targets of energy spending, and load control. The actual application are also presented along with its functional description. Through this application the costumer may visualize its energy consumption data and use this information to support decisions regarding the management, control or adequacy of their consumption habits. © 2013 IEEE.

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.

Siebert L.C.,LACTEC | Aoki A.R.,LACTEC | De Souza A.R.R.,LACTEC | Ferreira L.R.,LACTEC | And 2 more authors.
IET Conference Publications | Year: 2013

This paper presents a comparison between deterministic and probabilistic approaches to support decision making process for self-healing in smart grid, aiming to improve reliability indexes. Probabilistic load flow (PLF) considers inputs as probability density functions (PDFs) or cumulative distribution functions (CDFs), and therefore may give a more reliable power analysis. Three methodologies, namely deterministic load flow (backward/forward sweep), probabilistic load flow through Monte Carlo simulation and probabilistic load flow through Herman-Beta method were tested with real data of two distribution feeders located in Rio de Janeiro, Brazil. The simulations show that probabilistic approaches are able to provide valuable information to a more reliable decision making process for service restoration.

Toledo L.F.R.B.,LACTEC | Dahlke D.B.,LACTEC | Sans M.R.,LACTEC | Uhren W.,COPEL Distribuicao | And 2 more authors.
Proceedings of 22nd International Conference on Plastical Optical Fibers, POF 2013 | Year: 2013

This paper describes the development of an optical system for on-line thermal monitoring of power transformers immersed in oil using Fiber Bragg Gratings. The sensors were installed inside a power transformer near the high-voltage winding. The data obtained by the monitoring system were compared with data from conventional temperature sensor. Additionally the paper describes the attaching sensors technique employed and also the main difficulties encountered and the solutions adopted.

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