The Energy Networks Association (ENA) represents all of the UK network operators. Several projects have been initiated by the ENA R&D Working Group and have been funded through the IFI.

Objectives

Multiple projects have been undertaken and completed in previous years, those reported below are ongoing.

Harmonic Impedance Modelling

A final report has been produced and is currently under review. The outputs will be disseminated once it has been approved.

Earthing Project – HV/LV Earthing Transfer

A MS Excel based calculation tool has been developed for analysing the earth fault current distribution for the full range of representative 11kV cables. An extension to the project to include voltages from 33kV up to 400kV has been proposed. This new proposal is to add a representative sample of DNO 33kV, 66kV and 132kV cables into the routines. The 33kV and 66kV circuits and cables have many similarities to those previously modelled and can be added using the methods already developed. The 132kV circuits are more complex in terms of cable construction, circuit configuration, end resistance value (low) and circuit length (quite long).

Smart Grid Forum Workstream 3 Phase 1, 2 & 3

Phase 2 has developed a technical model and cost benefit analysis network investment tool for a range of typical network types from EHV to LV. The model can be run against synthetic networks at each voltage level under a range of low carbon uptake scenarios. As of March 2013 phase 2 is completed and can now be used for ED1 Business Plans. Work is currently commencing on WS3 Phase 3.

DC Injection

The objectives have been defined and the project is currently progressing through its early stages.