Abstract
On-line monitoring of partial discharges (PD) in turbine generator is a important test for assessing the condition of generator insulation system. In this study, a broadband current transducer system for on-line monitoring of PD in turbine generator has been studied. Combined with a pulse height analyzer and a frequency spectrum analyzer, the transducer system has been used to detect three types of simulated origins of PD which often exist in turbine generator stator winding (discharges in cavity, discharges at endwindings and discharges due to broken strand). The above three types of PD origins can be recognized by using the acquired time domain spectrum and frequency domain spectrum. Some on-line monitoring results of PD in turbine generator with the transducer system are presented.
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