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Projects: Projects for Investigator
Reference Number NIA_UKPN0074
Title LV Interconnected Pairs
Status Completed
Energy Categories Other Power and Storage Technologies(Electricity transmission and distribution) 100%;
Research Types Applied Research and Development 100%
Science and Technology Fields ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Project Contact
No email address given
UKPN London Power Networks plc
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 May 2021
End Date 31 May 2023
Duration ENA months
Total Grant Value £661,000
Industrial Sectors Power
Region London
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , UKPN London Power Networks plc (100.000%)
  Industrial Collaborator Project Contact , UK Power Networks (0.000%)
Web Site https://smarter.energynetworks.org/projects/NIA_UKPN0074
Objectives Base Case:- If a HV fault impacts a distribution substation with automation, supplies will automatically be restored. This is very quick.- If a HV fault impacts a distribution substation without automation, supplies cannot be restored until field staff manually apply backfeeds, if possible. Method description: A distribution substation with automation is connected to a distribution substation without any automation. These become an interconnected pair, where the substation with automation is the donor and the substation without automation is the receiver. The receiver substation is then able to benefit from the automation at the donor substation.A sequential explanation of the method: Interconnect a remotely-controlled and non-remotely-controlled substation to form an Interconnected Pair; In normal operation, the donor and receiver would not be interconnected; When a HV fault occurs, a modified software within the network automation would open a switch at the receiver substation to interconnect the donor and receiver before re-energising; and Both substations would then be energised. Network automation takes less than five minutes to acknowledge a fault and take action. This method would reduce the time in which customers connected to the LV network experience a loss of supply in the event of a HV fault.   The scope of the project is to complete the design and trial of the interconnected pairs methodology. The trial will cover up to a maximum of 30 pairs of secondary substations, spread across the LPN licence area, out of a total of 300 pairs of secondary substations that could benefit from this method. The preliminary design will also consider how many potential sites would benefit from this technology across the EPN and SPN regions. LPN was chosen for the trial project as it already has a high level of interconnection. This will make it quicker and easier to install the Interconnected Pairs method.  This project will be carried out across several work phases.  Phase 1: Preliminary design and specificationPhase 2: Detailed design[f the first 2 phases are successful, the project will proceed to a trial
Abstract Electricity networks contain equipment that operates at different voltage levels. Domestic customers are fed from the low voltage (LV) network. The LV network is fed from the high voltage (HV) network. The HV network is fed from the extra high voltage (EHV) network, and so on. When a fault occurs on the HV network, there is a cascading impact to the LV network that it feeds.  In more modern parts of the network, automation is used to prevent an LV outage when there is a HV fault. However, a large proportion of the LV network does not have any automation. For the majority of LV networks, when a HV fault occurs, the LV network fed from the affected substation loses supply. This means that all customers fed from that substation experience a power cut.
Publications (none)
Final Report (none)
Added to Database 14/10/22