A CCL topology based mid-range power transfer system for low voltage side equipments on power lines

In this paper, we propose a mid-range wireless power transfer system with CCL type resonant topology on source side for monitoring equipment power supply on electricity pylons. In consideration of low coupling coefficient caused by long transmission distance, a relatively high current level should be kept when using the traditional serial-serial topology(referred to as S-S topology), which increases the system energy loss and rise the breakdown risk on switching devices. The CCL topology could provide a relatively high equivalent impedance and still keeps the current on transfer coil high enough. The characteristic of this topology and the analysis of system efficiency at different load are given. The experiment result shown at in last part proves the availability of this topology.