Transmission-distribution coordination and transition to more actively operated distribution: why it matters

This Working Paper has been motivated by the growth of distributed energy resources (DER) on the electricity system in Britain, i.e. generation, storage and flexible demand that is connected at distribution network voltages, and the consultation published by Ofgem and BEIS in November 2016 on the subject of electricity system flexibility. It aims to give a very basic and rapid introduction to some of the issues and their origins.