Substation
Mostrando 13-24 de 32 artigos, teses e dissertações.
-
13. Study of IEC 61850 and its impact in substation automation system. / Estudo da IEC 61850 e o seu impacto no sistema de automação de subestações.
In current Substation Automation System, digital equipaments called IED (Intelligent Electronic Devices) are used with protection, automation and measurement functions incorporated. These devices, to exchange information among them, use serial communication buses with information transmitted in digital form through many procotols, many of them proprietary, m
Publicado em: 2008
-
14. Feeders parallelism through vis-a-vis disconnecting switches in aerial primary distribution network. / Paralelismo de alimentadores através de seccionadoras de vis-à-vis na rede aérea primária de distribuição.
An important aspect related to the distribution systems operation concerns the safety required in the post-disturbances restorement actions or in the emergency and scheduled maneuvers, which involve the need for load transfer between primary overhead feeders of a same sub-station or for an adjacent sub-station, in a safe and reliable way, complying with the
Publicado em: 2008
-
15. A melhoria da disponibilidade do compensador estÃtico da SE FTZ/CHESF atravÃs da anÃlise da sua Ãrvore de falhas
In the Electrical Power Systems, the Static Compensators â CE are equipment of extreme importance for tension regulation, both in a permanent regime as in a transitory one, mainly in systems where the load centers are located at great distances of the generating plant. This dissertation presents an analysis of the fault causes in the Static Compensator inst
Publicado em: 2008
-
16. Intelligent system to control voltage regulator relays / Sistema inteligente para controle de relés reguladores de tensão
This work presents an approach to voltage control in power distribution systems with load tap changers. Intelligent approaches are studied and applied in voltage regulator relay in order to improve the voltage profiles of the system. The proposal of this work is the addition of fuzzy modules in the conventional voltage regulator relays, which allows the expl
Publicado em: 2007
-
17. Estratégia de implantação de um sistema de gestão ambiental (SGA) em unidades de transmissão de energia elétrica: o caso da subestação de Ibiúna, SP / An implementation strategy of an environmental management system on power transmission system: The case of Ibiúna substation, SP
After the 20th century there has been, from the society, a great enlargement of the awareness relates to the environment, its particularities and the consequences that environmental pollution would cause to everyone. The industries, aware of these changes, started a alter in their production concepts, trying to diminish as much as possible the production of
Publicado em: 2006
-
18. An integration model between the IEC 61850 and IEC 61970 standards. / Um modelo de integração entre os padrões IEC 61850 e IEC 61970 (CIM/ XML).
REIN JR., O. UM MODELO DE INTEGRAÇÃO ENTRE OS PADRÕES IEC 61850 E IEC 61970 (CIM/XML). 2006. 98 p. Dissertação Mestrado Escola Politécnica, Universidade de São Paulo, São Paulo. A troca de informação entre os vários sistemas de gerenciamento e outros sistemas de informação de uma empresa do setor elétrico não é apenas desejada, mas, na mai
Publicado em: 2006
-
19. Cálculo de perdas técnicas em sistemas de distribuição - modelos adequáveis às características do sistema e à disponibilidade de informações. / Technical losses estimation in distribution systems - adaptative models to the system characteristics and availability of information.
This work aims at presenting and discussing some models for calculating technical and non-technical losses in distribution systems. The proposed methods comprise several possibilities depending on the available data. This discussion is very important since the electric sector faces new challenges, such as technical loss estimation in low voltage networks wit
Publicado em: 2006
-
20. Sistema de monitoramento e metodologia de estimativa dos tempos de operação do disjuntor. / Monitoring system and methodology to estimation of circuit breaker operation times.
The present work addresses the development of a circuit breaker monitoring system so as to collect information for predictive maintenance. The characteristics of the variables that are monitored through certain sensors linked to the circuit breaker, its acquisition and the treatment of the information, are analyzed. A prototype was developed and installed at
Publicado em: 2005
-
21. Uma contribuiÃÃo à avaliaÃÃo de acoplamentos eletromegnÃticos em subestaÃÃes do sistema elÃtrico / Contribution to evaluation of electromagnetic couplings in power substation
O desempenho satisfatÃrio das instalaÃÃes de um sistema elÃtrico depende essencialmente da operaÃÃo adequada de seus equipamentos, dos instrumentos responsÃveis pela monitoraÃÃo de sua operaÃÃo e dos dispositivos de mediÃÃo, proteÃÃo e controle. Esses dispositivos, tradicionalmente eletromecÃnicos, vÃm sendo substituÃdos por dispositivos el
Publicado em: 2004
-
22. Monitoramento e diagnÃstico de estado de disjuntores de alta e extra alta tensÃo como tÃcnica de manutenÃÃo preditiva
Concerning to the present rules applied to the energy sector in Brazil, quality of services plays an important part in determining conditions in which better results will be achieved. The Brazilian Electricity Regulatory Agency ANEEL - has imposed severe penalties to the electric companies involving large amount of money in case of equipment failures.
Publicado em: 2004
-
23. Análise comparativa de arranjos de subestações por estudos de confiabilidade. / Substations methodology comparison of different switchs by reliability application.
This dissertation aims at presenting a methodology and simulation model to compare different distribution substation configurations through a static reliability evaluation model applicable to different switching schemes. The comparison of the substation configuration alternatives, regarding reliability analysis, is carried out by the two following ways: - St
Publicado em: 2003
-
24. Um algoritmo para estimação de estado em alimentadores de distribuição de energia elétrica com base no método da soma de potências
Most algorithms for state estimation based on the classical model are just adequate for use in transmission networks. Few algorithms were developed specifically for distribution systems, probably because of the little amount of data available in real time. Most overhead feeders possess just current and voltage measurements at the middle voltage bus-bar at th
Publicado em: 2003