Software, data communication and control, etc, are standard in modern substations. Through the development and implementation of IEC 61850 since the mid-2000s, the way to design, configure, and run substations has changed. This IT influence brings with it many advantages, but it also introduces new challenges to the industry.
In the digital substation, the analogue signals and proprietary one-to-one connections between IEDs and network sensors have evolved to data networks and data streams.
IEC 61850, with its abstract data models defined, can be mapped to several protocols: MMS (Manufacturing Message Specification), GOOSE (Generic Object-Oriented System Event), and SMV (Sampled Measured Values).
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The IEC 61850 interface relay testers, FREJA and SMRT together with the software MGC Megger GOOOSE Configurator, and SVA Sampled Values Analyser, are the solutions used to test and troubleshoot IEC 61850 communication, both, GOOSE and process bus. Features like IEC 61850 sniffer, merge and compare, are cyber secure solutions that saves time and increase quality. Read more about Megger test solutions here
Tests performed virtually with the SMRT digital twin (are we promoting this on launch?) removes errors and uncertainties upfront before entering the often time pressured commissioning phase. A small subset of those tests would have to be repeated in the real world to verify physical connections and that correct settings are loaded into the relays. There are many other areas beside commissioning where benefits are seen such as FAT, training, support, development to mention a few. Read more in detail in the digital twin article and the IEEE paper on the same topic.
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DIGITAL SUBSTATION INCURSION
In digital substations, the conventional trip contacts are replaced by a GOOSE message and the conventional analogue voltages and currents are replaced by Sampled Values (SV) generated by Merging Units (MU).Learn More >
Connecting a PC to the substation network is not without its risks. However, the SMRT and FREJA units provide a secure access point to the substation network, and therefore cannot transmit ‘false’ data, nor infect the network with a virus. This is also known as the GOOSE ‘diode’.Learn More >
In digital substations the conventional trip contacts is replaced by a GOOSE message and the conventional, analogue voltages and currents are replaced by Sampled Values (SV) generated by Merging Units (MU).
GOOSE configuration can be a complex task. In MGC that configuration is optimised by ‘click-to-subscribe’ to map the appropriate GOOSE message to a binary input or output.
The briefcase size, powerful, single phase, SMRT1 is all you need to make protection related IEC 61850 testing which makes it cost efficient to get started.
It is a concern to connect a PC to the substation network. SMRT and FREJA provide a secure access point to that network and therefor cannot transmit ‘false’ data, nor a virus. This is also known as the GOOSE ‘diode’.
The sniffer function ensure that nothing is transmitted and that all GOOSE traffic is captured and grouped for good overview. If a GOOSE change status is it highlighted so it is easy to detect changes.
With all IEC 61850 capabilities available from the onboard touch screen there is no need for a PC. No PC connection issues, no software license issues, and no risk to transmit any virus to the substation network.
To compare the sniffed GOOSE traffic with its description in the SCD file is a very powerful solution to easily detect any differences between the design and actual status. Smart grouping and highlighted differences gives a superb overview.
The MGC provides advanced network troubleshooting tasks and maps GOOSE messages to binary inputs and outputs.
The SVA provides visualization and control of sampled valves (SV) for multiple data streams.
SMRT - FREJA Series
The test equipment is the hardware piece in the test system and interface to the IEC 61850 network. The display models have all testing capabilities onboard.
IEC 61850 interface, relay tester
FREJA and SMRT, together with the software MGC and SVA , are the solutions used to test and troubleshoot IEC 61850 communications, both GOOSE and process bus. Features like IEC 61850 sniffer and merge and compare, are cyber-secure solutions that save time and increase quality.
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