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How do you get data out of the 50 years old control system?

  • 21 April 2021
  • 6 replies
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The majority of the hydropower fleet is pretty old. It’s not uncommon to see a 100 years old power plant in operation. It’s all a great piece of engineering but how can you access operational data on your laptop or smartphone? You don’t want to travel every day to very remote locations.

From my side, I can share that at Ringerikskraft Hønefoss 2 power station we installed a set of cameras to passively record alarm events, read gauges, and stream this information to Cognite Data Fusion. It’s all connected so if the alarm goes off I get an SMS notification and can quickly look up what’s happening.

Pretty cool, hm? But I’m curious about your thoughts, how have you tackled this?

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Best answer by Mateusz Treder 26 April 2021, 11:11

Hello, the edge unit is Dell Edge Gateway 5000. Data is sent continuously to Cognite Data Fusion over WiFi and the Internet, with an outgoing HTTPS call (so we fetch it through CDF API).

Let me know if you feel that a call would help to better understand the setup.

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Nice!

Do you use visual- or audio detection to capture alarms, or do you also have I/O connected?  

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Hi Morten,

It’s mainly visual detection + edge gateway that pushes data to CDF. In CDF, we do our data modeling and set rules to trigger notification based on certain thresholds.
There is I/O wiring into the local instrument room. There is a Wago (from fint.no) I/O rack installed to get temperature values. (all others are based on cameras and computer vision algorithms)

Besides that, we also installed a depth pressure sensor at the dam, with an ADAM data reader that sends MQTT to CDF. 

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Hi Mateusz, 
Interesting project! A smart way of digitalizing old but good working equipment without having to change the whole system to fit new technologies.

How do you transfer the data from the edge unit to CDF? Are you using a MQTT extractor, OPC etc.?

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Hello, the edge unit is Dell Edge Gateway 5000. Data is sent continuously to Cognite Data Fusion over WiFi and the Internet, with an outgoing HTTPS call (so we fetch it through CDF API).

Let me know if you feel that a call would help to better understand the setup.

how secure is the connection to CDF from this planet, is there some kind of encryption tunnel or VPN. or just a pure internet connection.

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It's using standard CDF API access: HTTPS over a pure internet connection, and thus it is secure and encrypted. 

Of course, one can add VPN or another tunnel, or lock down the communication to just one IP or server certificate, but it's not required.

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