National Grid Electricity System Operator
National Grid TO Innovation Team
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Health and Safety
A collaborative research group is being established, made up of utilities,
manufacturers and research bodies, to investigate the Electromagnetic Transient
(EMT) interaction of renewable generation on transmission equipment. The
focus of the project will be on the EMT modelling of components (transformers,
cables, circuit breakers, instrument transformers etc.) to provide best practice
and expert opinion on their interaction with the power system.
System and plant measurements will be carried out to validate the models, which
can then be used to simulate and demonstrate the power system interaction
phenomena on equipment such as current inrush, harmonic penetration,
resonant overvoltages, etc. The work will consider transformer modelling (both in
terms of modelling expertise and laboratory facilities), and acquiring cable
lengths for the purpose of model validation (complex multi-phase cables with
steel armouring). In addition, a number of system studies will be performed in
order to highlight special transient phenomena such as how CT/VT saturation
may impact on protection performance.
Participants will highlight their interests, for instance, EDF want to compare case
studies using PSCAD and EMTP-RV packages, Statkraft would like an activity
on modelling oil-filled cables, Vestas is very interested in black-box cable
In summary, the work will:
- Develop component models to characterise the range of phenomena
associated with transient conditions
- Examine the network architecture
- Validate EMT models in different simulation packages
- Disseminate the results and models to the partners.