Power module for a wireless sensor node of a power line monitoring system

For a wireless sensor node of an overhead power line monitoring system a power module was developed using the electrostatic field around the conductor to supply the sensor system. Special requirements in functionality, reliability and the limited accessibility at the power line result in the development of a specific energy management strategy. First prototypes of the power module were realized and tested under laboratory conditions. The following contribution presents theoretical considerations to the energy availability using the aimed method, the design of the energy management strategy and results from measurements with the prototype in a high voltage laboratory.