Since brought into service in the sixties, XLPE cable has become the main kind of cable in middle and high voltage transmission system for its outstanding performance. But water tree in XLPE cable insulation is the main factor that will affect security and reliability of XLPE cable.
There are some methods to diagnose water tree aged situation in off-line condition. But what these methods can be developed into online detection technique is relatively few. Method of DC component and method of harmon...