Apr 2013
Electricity Transmission
Current and Earth Potential at Substations
Apr 2013
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Gas Distribution Networks
This project aims to establish whether a risk exists from the effects of step/touch potentials generated during transient surge conditions.
This programme addresses issues relating to earthing – a subject that has a major importance in ensuring safety of people (National Grid staff and the general public) who are in proximity to high voltage assets. The issues addressed within the programme are the improvement of safety systems to OHL work involving application and removal of portable primary earthing devices the lack of transient high frequency measurements on substation earthing systems during switching operations, surge arrester operation or during the flow of fault current in practice. In addition, no data on the effect of lightning impulse or tests data within substations exist. In order to verify the simulation models, it is crucial that measurements are undertaken.