This project aims to examine three different problems associated with the earthing of the T-pylon assets. The project will investigate the earthing performance of innovative T-pylons and the induced effects of the T-pylons and the associated energised lines. Induced voltages and induced currents will be measured and compared with the computational results to establish recommendations on earthing and induced effects. In addition, the project will examine the most recent computational (XGSLab) and measurement techniques to compare the computations with the existing techniques (CDEGs). Comparative computations of software will be conducted under variable frequency and transient currents will be injected into ground. Conducrete will also be explored to improve the earthing performance. Such low resistance materials will reduce the earth impedance and materials will act as an enlarged earth electrode size increasing the ability to dissipate more earth fault currents.

Benefits

The benefit of this project is based on an assumption that NGET will achieve earthing performance safety of its assets. A new computational software will also be explored which will reduce the capital and the yearly renewal cost as well. If this project is successful, over a 20-year period, we assume that health and safety will be improved for live T-pylon assets and lives of two on field personnel and 10 injuries can be saved resulting in generation of societal value created with a net benefit of £1.9m.