Session 3.3 Voltage Management, LV Modelling and System Control LCNI Conference Wednesday 12 October 2016 1
Paul Turner Innovation Delivery Manager 2
Smart Street project overview Extensive £11.5m, Started in Jan Quicker Trials period customer connection of four-year 2014 and finishes Jan 2016 – engagement LCTs innovation project in Apr 2018 Dec 2017 programme Lower energy bills throughout Improved supply project reliability 3
Voltage profile Normal voltage Drift range range Historic networks have no active voltage regulation 4
Problem - LCTs create network issues Drift range LCTs rapidly surpass voltage and thermal network capacity 5
Smart Street – the first intervention W C L W Low cost Quick fit Minimal disruption Low carbon Low loss Invisible to customers Voltage stabilised across the load range Power flows optimised 6
The Smart Street System 50 End Point 4 Overhead Monitoring 498 Weezaps 43 Lynx Line HV Devices Capacitor Spectrum 5 (NMS) 5 On-Load Tap Changing 4 HV Capacitors 84 LV Capacitors Transformers 7
Network reliability improvement Spectrum C C 2 C TC C W C 2 C CLASS L W W C L C 2 C C Capacity to Customers Capacitor WEEZAP LYNX On-load tap changer C 2 C C W L TC Builds on C 2 C and CLASS Storage compatible Transferable solutions 8
Trials – test regimes Smart Street trial Test regime 1. On-load tap changing distribution transformer only 2. On-load tap changing distribution transformer and capacitor(s) on LV circuits LV voltage control 3. Capacitors at distribution substation only 4. Capacitors at distribution substation and on LV circuits 5. Capacitor(s) on LV circuits only 1. LV radial circuits LV network management & interconnection 2. LV interconnected circuits 1. Voltage controllers at primary substation only HV voltage control 2. Voltage controllers at primary substation and capacitor(s) on HV circuits 1. HV radial circuits HV network management & interconnection 2. HV interconnected circuits 1. Losses reduction Network configuration & voltage optimisation 2. Energy consumption reduction 9
Trials W/C 14/06/2016 – 19/07/2016 – 09/08/2016 – W/C 14/3/2016 24/06/2016 01/08/2016 22/08/2016 22/08/2016 Successful OLTCs only Use of LV HV and LV HV meshed operation of meshing & meshing circuits only OLTC and LV OLTCs capacitor banks 10
Aims Quantification Validation of Identify potential of CVR benefits optimisation power quality techniques and customer side impacts 11
CVR modelling . . . . Graphs taken from UoM research – L Gutierrez/ Y Shen 12
CVR modelling CVR on LV Networks Case study (Brynton Rd 171279) Operation of OLTC Operation of capacitors Result of all LV networks Average voltage reduction = 4.88% Total energy savings = 5.12% Total loss savings = 1.83% CVR factor = 1.10 No voltage problem or overload . . 13
Outcomes to date ~25GB of data Trial area Predicted CVR Analysis Ring operation recorded so far networks factor of 1.10 techniques modelled and modelled for LV and 1.01 indicate compared to for HV networks optimisation radial algorithm is close to optimal 14
Still to come Effects of voltage reduction on lighting and domestic appliances under Carbon impact Analysis of trials investigation being studied data ongoing 15
Smart Street summary Combine into one First example of centrally end-to-end controlled LV network system Range of intervention Optimisation solutions Challenge Learning Faster LCT adoption Carbon Benefit Lower energy bills Footprint Less embedded carbon More reliable supply Re-usable technology Reinforcement savings Optimise energy and losses 16
For more information www.enwl.co.uk/thefuture e futurenetworks@enwl.co.uk 0800 195 4141 @ElecNW_News linkedin.com/company/electricity-north-west facebook.com/ElectricityNorthWest youtube.com/ElectricityNorthWest Please contact us if you have any questions or would like to arrange a one- to-one briefing about our innovation projects 17
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