312 – Metodologia para a aplicação da norma IEC61850-9-2: aplicando SDN como reconfiguração de rede

ABSTRACT

 Traditionally protection relays receive voltage and current signals from transformers (CT and PT) in the Electric Power System via electrical cables. The section of the IEC 61850-9-2 standard proposes an alternative to this scheme - using an electronic device to digitize this information while still in the yard, and sending it over the Ethernet network via a communication protocol. In this context, all samples and all information received from the protection relays, it is obtained through this network. In the technical report IEC TR-61850-90-4, it is possible to find solutions and tools to guarantee the availability of this network. The main concern is precisely to ensure that in a disturbance of the electrical system, there is also no communication failure. Such a failure could cause significant damage to the Electric Power System. This work provides the use of SDN (Software Defined Network) as an alternative to the options applied by IEC TR-61850-90-4, without management and reconfiguration of the Ethernet network to guarantee the requirements and IEC 61850-9-2 application standards. Application of the Sampled Values (SV) protocol. For the validation of this proposal, a test in the laboratory with switches, protection relay, a Stand-Alone Merging Units (SAMU), and a precise watch, it was used to build a process bus and to apply real possible failures in that process bus. The faults restored by the performance of the SDN ensured that the protection functions in the protection relay were not blocked.