Substation SCADA Protocol Conversion

Substation SCADA Protocol Conversion



Introduction
Distribution System Operators (DSO) typically use a variety of outstation devices, master systems and protocols. Each new protocol increases the test, maintenance, deployment and IT system overheads, so most DSOs are looking to consolidate around a master running a specific protocol for SCADA.

Virtual Access Mini RTU
Virtual Access substation hardened routers include a function called Mini RTU that provides any-to-any protocol Gateway that allows the DSO to consolidate on a single protocol. This means that the SCADA master configuration, testing and maintenance can all be simplified.
Mini RTU includes the following functionality:

  • For connection to the master, it emulates and RTU that is the controlled station function.
  • For connection to an RTU, it emulates a master that is the controlling station function.

A data point mapper maps between the master and RTU protocols providing completely generic mapping between outstation and master, meaning that it can work with any outstation or master device that is compliant to the standards. Even if it is not, there are setup parameters that allow it to work in non-compliant situations.

The protocol table below shows the protocols currently available, planned for upcoming release and planned for 2018.

ProtocolRouter = Controlled StationRouter = Controlling Station
IEC 60870-5-104 (TCP)YesYes
IEC 60870-5-101 (Serial)Q4 2017Yes
DNP3 SerialQ1 2018Yes
DNP3 TCPYesYes
Modbus TCPYesYes
Modbus SerialYesYes
IEC 61850YesYes


Management

A key difference in our solution is the carrier-grade Activator provisioning and monitoring system designed to scale to tens of thousands of devices. This means that devices do not need to be pre-configured and can be installed without staff skilled in networking. The solution allows the DSO to maximise the level of process and field deployment automation by integrating with northbound IT systems and enabled devices behind the VA router in the substation’s cabinets to be configured identically, while still being individually addressable from the central SCADA systems.

Protocol Gateway Summary

  • IEC 60870-5-101, IEC 8-870-5-104, DNP3, IEC 61850, Modbus
  • RS232, RS485
  • Digital I/O
  • Conversion at remote site
  • Central site application available
  • Deploy to same device everywhere to simplify maintenance
  • Substation-hardened device
  • Two seconds last GASP power

Products

Key Benefits

  • Supports existing protocols
  • Supports IEC 61850, and will continue to be upgraded for future proofing
  • Single device provides required functions
  • WAN interfaces include dual SIM, dual antenna, 3G/4G, fibre, DSL
  • IP-rated, rugged device
  • Last GASP message for power failure
  • Rugged: high isolation options on the PSU and interfaces
  • Vibration and mechanical to EN standards
Download as pdf