Research on Energy Harvesting Device of 10Kv Three-Core Cable Based on Self-Collecting Energy

The condition monitoring system of power cable is an important part of the construction of smart power grid, and the on-line monitoring equipment is the core of the condition monitoring system. Aiming at the power supply problem of the on-line monitoring equipment of 10kV three-core cable, this paper proposes an energy collection device that uses the magnetic field around the three-core cable to obtain energy. Firstly, the magnetic field distribution model around 10kV three-core cable is established, and the optimal arrangement of induction coils is obtained by calculating the spatial magnetic flux. Secondly, the structure and parameters of the iron core and induction coil in the energy harvesting device are optimized by model simulation. Finally, when the bus current is 100 A, the output voltage peak of the single induction coil reaches 2.5V, and the total output power of the three induction coils reaches 105mW.