Autonomous temperature measurement on cables to record the current degree of utilization and thermal status
// Electronics and Electrotechnology // Energy Transfer // Measuring and Control Technology
Ref-Nr: 16013
Abstract
The present invention can be used in the asset management of energy transmission and distribution grids. It enables early detection of condition, utilization and damage of cables by measuring the temperature at critical points from outside.
Fig. 1: Schematic diagram of a power cable with a measuring system in the conductor
background
Methods that attach external sensors to the cable sheath are known. The cable temperature is deduced from the values using calculation models. Another possibility is the use of optical fibers that are inserted into the cable sheath. The light changes its polarization or will be reflected depending on the temperature.
Motivation
Disadvantages result from changes in the electric field, the need for additional energy for the measuring equipment and the complex calculation procedures.Innovation / Solution
The new process is particularly suitable for the connec-tion points (joints, plugs) that could not previously be monitored. It requires no additional energy source, as electricity is generated and used from the resulting heat. Fig. 1 shows a schematic diagram of a power cable with a measuring sensor in the conductor as one possible design.Benefits
For grid operators:
Can be attached to fittings and accessories
Easy localization of a fault due to radio signal
Can be used for AC and DC cables
For manufacturers:
If the sensor is integrated, a significant quality fea-ture for the longevity of the product is won
Contribution to climate protection through economi-cal use of raw materials and resources
fields of application
The present invention can be used in the asset management of energy transmission networks.You can close this window. You can find your search results in the previous window
