Mar 2011
Electricity Transmission
Alternative Bus Bar Protection Solution
Mar 2011
Mar 2014
National Grid Electricity Transmission
Simon Pomeroy
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Network Innovation Allowance
A policy for single Digital Bus Bar Protection has been employed on the National Grid UK Transmission network since 2002 either as a replacement system (for duplicated high impedance schemes) or for all new build double bus bar substations. These systems have a distributed architecture with remote bay units (interfacing to the plant) for each protected circuit with ruggedized cross site fibre connections to a central processing unit. Where a substation has a centralised relay room (e.g. GIS) layout, the bay units are colocated in a suite of cubicles and connected with a network of fibre patch cords.

This R&D Project aims to deliver an evaluation and desk top design solution of an alternative digital bus bar solution architecture. This will help formulate a future technical and procurement strategy for bus bar protection, potentially leading to a pilot installation, evaluation and deployment as a replacement (or new) bus bar protection system. 

This project will be successful when it reviews designs and products used by other utilities for adoption on the UK Transmission system. Further success is an option to install a viable digital bus bar protection system.