HSR: Protocolo de Ethernet com Redundância para Aplicações Críticas

06/18/2021

The control of the electrical substations depends greatly on the reliability of the measured signals and on trustworthy data transfer. Electrical substations and other critical applications require networks resistant to single point failures that provide reduced recovery time after a failure. To provide this type of robustness, the IEC 61850 standard selected the protocols HSR and PRP as redundancy protocols for industrial Ethernet networks in electrical substations. These protocols establish rules of communication, what leads to the obligation of fulfilling a specific functioning of the nodes in HSR or PRP networks. The implementation of the network nodes requires a link redundancy entity (LRE) that deals with the redundancy issues, making it transparent to the application. For the HSR protocol this implementation must be done in hardware to accomplish the timing requirements of the network. One of the most important requirement of the LRE operation is the ability to make a quick identification and rejection of the redundant traffic. To do so in an efficient way, the non-redundant traffic must be registered in memory for the identification of the redundant traffic, which requires an adequate data structure and search algorithm. This dissertation proposes an architecture for an FPGA implementation of the HSR protocol. A Verilog description and several behaviour verification tests were written. The implementation of the architecture was simulated and the intended behaviour of the proposed solution was confirmed.

Authors in the community:

• 

  G

  Guilherme Oliveira Martins de Bessa

  ist180756

Supervisors of this institution:

• 

  F

  Fernando Manuel Duarte Gonçalves

  ist13142

electrical-engineering-electronic-engineering-information-engineering - Electrical engineering, electronic engineering, information engineering

por - Portuguese

Instituto Superior Técnico