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Rio de Janeiro, Brazil

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

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. Source

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

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. Source

Manassero Jr. G.,University of Sao Paulo | Senger E.C.,University of Sao Paulo | Pellini E.L.,University of Sao Paulo | Koehler M.,COPEL
IET Conference Publications

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. Source

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

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. Source

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

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. Source

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