Investigating the impact of network security on the line current differential protection system

The Journal of Engineering

Andreas Unterweger¹  Dominik Engel²  René Mayrhofer³  Andreas Aichhorn⁴ 

[1] Development , Linz , Austria;Johannes Kepler University, Institute of Networks and Security , Linz , Austria;Salzburg University of Applied Sciences, Center for Secure Energy Informatics , Salzburg , Austria;Sprecher Automation GmbH , Research &

关键词: system safety;    line current differential protection system;    IP-based Ethernet protection interface;    IPsec;    security concept;    system behaviour;    CPU;    network security measures;    power system protection device;    communication channel;    CPU performance;    protection function;    protection relay;    trade-off analysis;   

DOI  :  10.1049/joe.2018.0242

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

This paper analyses the influence of network security measures on the system behaviour of a power system protection device. In this particular case, an IP-based Ethernet protection interface of a line current differential protection system is considered. IPsec has previously been proposed to be part of the security concept of the protection interface. Therefore, the authors conduct a trade-off analysis regarding the influence of IPsec on the protection function and consequently on the system safety. This work shows that the protection function of the relay is not impaired as long as the additional CPU performance for the encryption by the protection relay is available and the necessary bandwidth on the communication channel is provided.

【 授权许可】

CC BY