IEC-61850: interoperability and interchangeability between supervision, control and protection equipment using data communication networks / IEC-61850: interoperabilidade e intercambialidade entre equipamentos de supervisão, controle e proteção através das redes de comunicação de dados

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Data communication has always been considered as a critical factor in real time operation of electric power systems. This is due to the need for fast and accurate decisions at different locations, from power generation to the user interfaces. With the digital technology, measurement, signals and commands are encrypted into data packets that travels on the substation network, using protocols that provide the format, rules, methods, dealing with parameters which ensure the traffic of information between two or more devices in the substation automation system. Since the number of communication protocols has become a challenge for users and manufacturers, creating islands of information, the IEC-61850 standard seeks for harmonization of the different equipment and manufacturers, enabling the integration of data for maximum performance. The proposal of this work is the actual implementation, at the Energy Systems Laboratory from the University of Sao Paulo, of an infrastructure of data communication network, which allows experimentation, measurement, analysis and assessment of information, interoperability and interchangeability of supervision, control and protection equipment, especially Intelligent Electronic Devices (IEDs). In order to develop applications focused on the study of automation of substations between the process and bay levels, using the infrastructure mentioned above, a logic to bay control using data communication, as well as a logic for high voltage source switching are presented. These situations test information exchange using the IEC-61850 standard as a communication protocol, and the Ethernet network replacing parallel wiring. It also tests the interchangeability amongst IEDs from different manufacturers. There were in 100% of the cases tested, correct reception of commands using parallel wiring or GOOSE messages. From the results, the stability and efficiency of the implemented logic can be observed as well as a reduction in time required to exchange information in the system. Moreover, a behavior evaluation in time of GOOSE messages was implemented for different traffic and topology conditions, monitoring possible loss of messages. In all applications a methodology to specify the automation of discrete logic using the standard IEC-61850 was implemented, featuring concepts, such as the functional specification of the applications, data mapping, the definition of the type of logic node used, the configuration of GOOSE, as well as the allocation of data structure for each logical node. The results reflects in the laboratory environment the demands requested by an actual electric power system.

ASSUNTO(S)

interchangeability digital protection relay sistemas elétricos de potência intercambialidade interoperability interoperabilidade comunicação de dados iec-61850 data communication electric power systems relé digital de proteção iec-61850

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