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Low Voltage Network Solutions

Low Voltage Network Solutions. Plenary session A – Monitoring Networks Dan Randles Quality of Supply and Technical Manager/LCNF Tier 1 Manager. Aims and Objectives.

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Low Voltage Network Solutions

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  1. Low Voltage Network Solutions Plenary session A – Monitoring Networks Dan Randles Quality of Supply and Technical Manager/LCNF Tier 1 Manager

  2. Aims and Objectives • Aim to improve understanding of existing and future characteristics of Electricity Northwest’s Low Voltage (LV) networks and to aid development of future policy and practice • Three key themes of the project • LV Network Monitoring • LV Network Modelling • LV Network Solutions • 3 year project started in April 2011 costing £1.5M

  3. Network Monitoring • Scope of the deployment • 200 x 11kV or 6.6kV to 415V distribution substations • Over 1000 LV feeders • Sites comprise indoor and outdoor, mostly ground mounted with small number of pole mounted transformers • Analogues to be captured • RMS voltages and currents • Real and reactive power • 3ø + neutral • Temperature (Ambient, Tx) • Real-time (1 minute averages!) • Harmonics (not real time) ENW iHost UoM DB Offline data transfer GPRS/3G Private APN Metrology and Communications (V, I, Q, P, H, Temp)

  4. Data Flow

  5. Installations (1)

  6. Installations (2)

  7. Installations (3)

  8. Feeder mid-point and end-point • Low Voltage Smart joint takes monitoring beyond the substation • Utilises the Gridkey ‘grid hound’ current sensor • 3-phase service cable used for phase voltages (IPCs) • Gridkey metrology and communication unit to be mounted at street level with separate communications channel to iHOST Metrology

  9. Demand characteristics • 1 minute resolution provides interesting insights … • … now we just need to understand what it means …

  10. Lessons learnt • Installation resources • IT and system integration issues • Customer impact must be minimised • True partnering approach with all project stakeholders • Flexible solutions needed owing to on-site variations • Site surveys essential to avoid problems • Installation quality including anti tamper/vandal • Large volumes of data being generated which needs managing – requires new tools/systems

  11. Network Modelling Extract Validate Analyse

  12. Networks solutions • Its about specifications, standards, policies and practices; understanding how these ought to evolve • The adoption at scale of low carbon technologies will have a significant impact on LV networks • Voltage rise/drop • Congestion/overload of assets • Monitoring is key to firstly understanding the capabilities of LV networks both now and in the future and secondly facilitating smart operation • Trade-off between visibility and cost • Sampling rates should be appropriate • Appears likely that active means of controlling voltages and loadings in LV networks will be implemented in the future • Significant change in operation and planning procedures for DNOs

  13. Thank you • Any questions…? Key contact names Dan Randles (Electricity Northwest) Paul Beck/Oliver Burstall (Gridkey) Julian Brown/Simon Hodgson (Nortech) Dr Luis Ochoa (UoM)

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