摘要 |
<p>A method for measuring and processing data pertaining to an activity of p artial electrical discharges taking place in a three-phase electric machine (1) powered with square wave voltage, said data comprising a plurality of di scharge signals and a plurality of sets of three values (eu, ev, ew) of powe r supply voltage of the machine measured in concurrence with a corresponding discharge signal, comprises the following steps: - transforming each set (e u, ev, ew) of three voltage values measured into a corresponding pair (ed, e q) of voltage values; - deriving a phase angle value from each of said pairs (ed, eq) of voltage values; - attributing to each discharge signal the corr esponding phase value, to assess the measured discharge signals as a functio n of corresponding phase values. Prior art techniques for processing data pe rtaining to activity of partial electrical discharges taking place in three phase electric machines powered with square wave voltage provide for assessi ng the measured discharged signals as a time sequence of events, with no pos sibility to place them effectively in relation to the power supply voltages, this entailing that any subsequent statistical processing of the measured d ata will have little significance.</p> |