A current transformer feeding power supply for distribution automation systems

To benefit the compact and insulation design of feeder switches, a current transformer feeding power supply is put forward. The non-linear behavior of the current transformer, the circuit topology and design considerations of the proposed power supply are detailed. Losses of the devices and the minimum primary current to ensure the performance of the power supply are analyzed, as well. Experiments are made on a current transformer feeding power supply, the results of which show that the suggested topology is feasible and the proposed approach is effective.