K-RSTP, DT-Ring, DT-Ring+, DT-Ring-E, Kyland Redundant Ring Technology

Industrial Ethernet switch has been widely used in the fields of electric power distribution network, digital power substation, wind power plant, rail transit, high speed railway, industrial control. And it has been also applied more and more in the areas of important communication and control systems.

Industrial field communication requires for reliable communication, redundancy, and fast recovery.  In some areas, it also requires data bypass flow and isolation, load balance insurance and etc. For these reasons, all kinds of redundancy protocols including STP, RSTP, PVSTP and MSTP appear since 1990’s. However, all these redundancy protocols are designed for commercial networks, and while they are used in industrial Ethernet networks, they have obvious disadvantages on long recovery time and limited supported topology.

Kyland has been devoting itself in developing such kinds of redundancy protocols especially for the field of industrial Ethernet. These protocols include K-RSTP, DT-Ring, DT-Ring+, DT-VLAN and DT-Ring-E, which can ensure the redundant backup, fast recovery time, and load balance for industrial Ethernet switches.

White Pape-Kyland Redundant Ring Technology.pdf

Kyland solution for IEEE1588 Precision Time Synchronization in Electric Utilities

In measurement and control systems there is often a need to synchronize distributed clocks. Traditionally, synchronization has been achieved using a dedicated medium to convey time information, typically using the IRIG-B serial protocol. NTP and SNTP have the advantage of being able to synchronize computers over a local area network. However they do not have the accuracy required for the most demanding substation applications. The electric power industry has recognized that with IEEE1588 v2 there now exists a network based precision time synchronization protocol that is reliable and accurate enough.

Over the past two decades Ethernet has become the dominant technology for data transmission, in particular with telecom and wireless providers, due to its simplicity and low cost. However, the asynchronous nature of Ethernet provides certain transmission challenges.
 
According to IEEE1588 v2 and IEC61850, Kyland developed its own full solution for smart grid including PTC2000 series of precision time source, PTC1000 series of user terminal precision time card and clock convertor, SICOM3024PT series of industrial Ethernet switch supporting precision time synchronization.

White paper- Kyland solution for precision time synchronization.pdf