Patent ID: 7579843

Claim:
A method of analyzing electrical insulation of an electrical machine comprising: receiving a first signal that includes a plurality of partial discharge pulses from the electrical machine and a plurality of noise pulses; receiving a second signal that includes information relative to at least one process parameter associated with the electrical machine and at least one parameter associated with the environment surrounding the electrical machine; determining the plurality of partial discharge pulses from the plurality of noise pulses; identifying characteristics of the plurality of partial discharge pulses relating to the location and character of partial discharges in the electrical machine; determining a cluster of points in a time-length (T) versus bandwidth (W) (WT) domain associated with the plurality of partial discharge pulses, wherein each point is representative of one of the plurality of partial discharge pulses or one of the plurality of noise pulses; and determining a condition of the electrical insulation using the identified characteristics and the received information relative to at least one of the process parameter and the environmental parameter.