Improving the Operational Performance of National Grid’s Cable Networks Energy USRG Meeting Dr James Pilgrim 22 May 2012.

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Improving the Operational Performance of National Grid’s Cable Networks Energy USRG Meeting Dr James Pilgrim 22 May 2012

2 What is Operational Performance? Defined by current ratings, losses and reliability/availability Current ratings based on thermal/ electrical models International standards exist for some scenarios, but are not always applicable

Our Contribution Improvements to international standards through better modelling Development of 3D finite element modelling techniques for 400kV cable joint bays Improved modelling of cable tunnels allowing greater flexibility Development of CFD-based models for novel cable trough installations Thermal modelling for next-generation high temperature cable systems Support National Grid with model development and verification for complex projects

Impacts Achieved National Grid have commissioned software builds of our new methods Influencing the design of future 400kV cable tunnel projects Methods recommended by international Cigre B1.35 WG on cable current ratings Currently developing models for Western HVDC Link (worlds biggest cable project) iles/_CD_WHVDC%20Consulation %20Document%20reduced.pdf