Technical Losses

Losses are an inherent consequence of the operation of any electrical network and arise as power flows through equipment such as cables, overhead lines and transformers. Losses have been shown to be complex due to multiple dependencies and vary significantly across the different voltage levels and with network topology, LCT uptake, and the amount of connected distributed generation. Difficulties in measuring losses means that alternative methods of evaluating losses now need to be considered.

With the Governments introduction of The Carbon Plan 2050 legislation and the need to meet EU emission targets there will be a requirement to ensure that the electricity networks within the UK are capable of meeting the additional demand without exacerbating the losses on the existing electricity network.

A recent study undertaken by WSP and completed in March 2018 study have improved understanding of future technical losses in terms of how they will change when electric vehicles, heat pumps, LV PV and generators are connected and also how they will be affected by the application of traditional and smart reinforcement approaches to accommodate these connections.

ENA and member companies have set up the Technical Losses Working Group to review the impacts and management of technical losses, to ensure compliance with Electricity Act 1989 and core industry documents including guidance and Codes and to develop a preferred RIIO2 losses mechanism with which to facilitate DNO ED2 regulatory submissions. 

Associated Documents 

ENA - Impact of Low Carbon Transition on Losses - INTERIM Report (September 2017)

ENA - Impact of Low Carbon Transition on Losses - FINAL Report (March 2018)

CEP023 Technical Losses Mechanism Study Final Report (September 2019)

CEP023 Technical Losses Mechanism Study Summary Report (October 2019)