Siemens has launched its Siprotec 5 Precision Time Protocol (PTP) Grandmaster Clocks (GMC), designed to enhance time synchronization in digital substations and protect critical grid functions from disruption. These devices provide stable, local precision timing using internal oscillators, operating independently of external GNSS signals that are often vulnerable to interruptions caused by interference, jamming, or natural disturbances.
A central feature of the solution is Siemens’ patent-pending Seamless PTP grandmaster changeover technology. This mechanism aligns returning primary clocks with active backup clocks before switching control, preventing abrupt time jumps that can interrupt protection functions. By maintaining continuous synchronization during clock transitions, the system reduces the risk of outages, false tripping, and unnecessary equipment shutdowns.
The Siprotec 5 setup also separates the process bus from the station bus, improving cybersecurity by removing external access points. This autonomy strengthens the resilience of digital switchgears and helps utilities avoid costly downtime.
According to Siemens, the technology addresses a key challenge in modern substations: ensuring reliable protection even during time source fluctuations. By supporting stable operation and isolating critical networks, the new system contributes to more dependable and secure power grid performance.
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