The most important indicator of the health of electrical plant items is the condition of their insulation. In the case of underground cables an important issue is the operating temperature and indeed the thermal history of the cable. There are several factors which will determine the thermal behaviour of a given cable installation. These include the assumed ampacity, the cable construction and circumstances of installation, the thermal properties of the surrounding soil and the ambient temperature. The work presented in this paper involves the use of COMSOL multiphysics finite element software to develop an integrated electrical, thermal and mechanical model of buried single or multiphase cables that simulates the behaviour occasioned by a varying load.
- electical and computer engineering
- electrical plant