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LV Network Monitoring Demonstrating the Possibilities

25 October 2012 Gideon Evans. LV Network Monitoring Demonstrating the Possibilities. Introduction. SSE’s Low Carbon homes Can LV Network Monitoring equipment be retrofitted without taking customers off supply?. Capacity. Average Demand. Demand. XX:00. XX:30.

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LV Network Monitoring Demonstrating the Possibilities

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  1. 25 October 2012 Gideon Evans LV Network MonitoringDemonstrating thePossibilities

  2. Introduction SSE’s Low Carbon homes Can LV Network Monitoring equipment be retrofitted without taking customers off supply?

  3. Capacity Average Demand Demand XX:00 XX:30 Understanding the LV Network • Capacity • Current • MDI Information • Demand and Generation • more informed decisions • Performance • Voltage Limits • Power Factor • Power Quality / Harmonics • more informed decisions Time

  4. Monitoring Equipment Measuring Voltage MDIs Calculated data Storage of data Rezap Fault management Transmission of data Installing Equipment Measuring Current

  5. Measuring Current Conventional CTs Installation would require disruptive substation works Known choice Rogowski Sensors Can be installed around existing cable cores Accuracy considerations Innovations Sentec GRIDKEY current transducer Now on the market

  6. Measuring Voltage Terminal Block Connection Possible on modern fuse cabinets (eg Lucy Trifca) Constrained cable routing Need to drill holes in enclosures? Direct Busbar connection Requires work on live busbars Connection leads need to be routed away from operational area Innovations Drummond G clamp Now on the market

  7. Data Aggregation Manufacturers offered integrated solutions Current Group offered Open Grid product GE offered a C650 Relay / RTU, designed to work with ENMAC Selex Galileo offered their Sentec Gridkey product Early versions had limited functionality They had difficulties with measurement of directional current and harmonics Communications Aerial extensions were required Data Storage in the data aggregator Issues with capacity and reliability Cabinets Issues with size, weight, IP rating and mounting

  8. Equipment Connection

  9. Current Group Open Grid Chalvey Local s/s Harmonics Real and Reactive Power

  10. Selex Galileo / Sentec - GridKey

  11. Communications Modes of Operation Streamed (Real Time measured data) Half Hour (Calculated data) Alarms (Un-solicited data) Protocol - DNP3 For use with existing SCADA based control systems Standardised template was needed Storage Pi Historian

  12. Further investigation Streamline installation process? (Thames Valley Vision Project) Equipment life-cycle – what should we expect from manufacturers? (Thames Valley Vision Project) Total monitoring system accuracy? Monitoring systems’ own energy usage?

  13. Key Learning Points Live retrofitting can be done Today’s equipment can monitor complex electrical parameters LV network is as unbalanced as we thought! Monitoring is a system. Comms and data storage are key features, not bolt on extras Manufacturers value access to DNO networks – help them to help you

  14. Any questions? Thank you

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