Research On Measurement Technology And Engineering Application Of Operation Temperature Of Cable Conductor

Nowadays, excessively rapid growth in national power grid results in its management’s being behind the development. According to the demands of State Grid Corporation of China, this article researches the engineering application of on-line measurement technology of cable core temperature, so as to provide power grid management with technical support. Operation thermal performance of high voltage single-core cable is analyzed here, as well as the maximal sustainable current and spare power transmission capacity under permissive temperature rise.In addition, based on above analyses, technical verification is carried out to research the performance of a new built-in temperature measurement technology which is used in topical area of Hangzhou city. It is finally definite that this new technology could serve the electric grid for power capacity balance, cable operation summary and technology application optimization in discuss. During this research, operation temperature is constantly gained by high precision equipment to calculate spare capacity and promote power capacity balance. And furthermore, because of the close links between cable core operation temperature and common cable faults, cable operation faults information and risk pre-warning system are then taken into account.