Power Utilities routinely need to transport T1, Telephone, Serial and Ethernet between substations and a central office. TC’s JumboSwitch is a proven and economical solution for integrating Ethernet and Legacy applications on one industrial hardened Multiservice Access Platform (MSAP).
Teleprotection-over-IP
Teleprotection signals from protective relays are some of the most critical in the Utility industry. These signals help manage power grid load and protect network equipment from severe damage. Teleprotection channels are required to be fast, reliable, dependable and secure.
As legacy infrastructure and substation devices migrate to Ethernet and IP networks, some of the industry’s main concerns are meeting latency requirements and signal dependability.
Fast
Teleprotection operation times are required to be between 5 and 15msec to ensure high voltage system faults are cleared within 100msec. Typical processing delay on the JumboSwitch fiber network is 2-5msec end-to-end.
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Monitor Latency in Real Time
Communication channel latency can be monitored real-time and traced historically.
- Allow the protection engineer to calculate latency budget of protection schemes
- Improve teleprotection performance
- Use as a diagnostic tool when troubleshooting delays and isolating problems
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Dependable and Secure
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System reliability is a combination of dependability and security. 1+1 Hitless switching ensures that no packets are lost. Packets are sent across the network in both directions, achieving zero recovery time, no bit error, and no lost packets along with minimum delay variation ( < 0.25msec).
Security is assessed by the probability of an unwanted trip caused by interference and achieving minimal Bit Error Rate. With 1+1 Hitless switching on the JumboSwitch, there are no false commands (i.e. no bit errors).
Teleprotection Products
Legacy Networks
TC products offer total support for existing legacy networks and provides a gradual migration path to Ethernet/IP. Specifically, legacy application support includes all popular Serial interfaces (RS232, RS422, RS485), TDM (T1/E1 and T3/E3), E&M, C37.94, G.703/64K, Analog (2/4wire) and Dry Contact.
The use of T1/E1, T3/E3, or OC-3/STM-1 circuits over microwave links is common practice in many cases where remote substations may be located outside the reach of optical fiber. In other cases, the utility may want to leverage their existing SONET/SDH network to connect their new Ethernet/IP network in order to set up a gradual migration to Ethernet/IP.
TC’s Legacy line and JumboSwitch family offer highly flexible connectivity options including the latest in Ethernet-over-PDH technology including Ethernet over T1/E1, Ethernet over T3/E3 and Ethernet over OC-3/STM-1.
Multi-Service Platform
Multi-Service Access Platforms (MSAP) can offer Standards based Layer 2 functionality that is critical for providing multi-vender interoperability and supporting various traffic types with different characteristics. For example, voice applications are less tolerant of delay and jitter in the network than email and network access. Therefore, the ability to customize each traffic stream based on its characteristics is important to successfully deploy a shared layer 2 backbone.
The implementation and support of these layer-2 features on the JumboSwitch MSAP is critical for the deployment of various IP services critical to the Power Utility industry including:
- Teleprotection
- Voice over IP
- Video surveillance
- Metering
- Corporate LAN
- Mobile Radio
- SCADA
Application Diagrams
Turbo Serial Teleprotection Application
C37.94 Hitless Applications
G.703 / 64K Teleprotection Application
JumboSwitch Multi-Service Application
Telephone & Data Application
Dual Master Self Healing Ring Application
