Читать книгу Building an Effective Security Program for Distributed Energy Resources and Systems - Mariana Hentea - Страница 35

Security as communication reliability is used to describe the reliability for power system communication, which has several facets, including the probability that a given message will be lost entirely, the use of redundant communication paths and automatic failover to protect against message loss, the expected time delay (latency) in delivering a message, and the expected variability of that time delay (jitter) [Nordell 2012]. It also involves how competing messages may (or may not) be given priority when communication channels are saturated. This latter parameter is known as quality of service (QoS) and has long been practiced in the world of telephony, but it is a relatively new concept for power system engineers.