On-line partial discharge monitor system of XLPE power cable based on virtual instrument

High voltage XLPE power cable is a very important part of power system. The degree of electric-tree aging in the cable can be estimated effectually by measuring partial discharge. An on-line partial discharge monitor system of XLPE power cable was developed based on the virtual instrument designing conception. This system has the advantage of wide analog bandwidth, excellent anti-interference ability, good stability, powerful analysis, friendly interface, convenient operation, etc, it can detect the quantity of partial discharge (PD) in XLPE power cable. It holds utility value in power system.