Title :
The study of broadband current transducer system for on-line monitoring of partial discharges in turbine generator
Author :
Ma, Hui ; Ma, Jixun ; Wu, Guangnin ; Huang, Zhigang ; Wu, Xinyan ; Xie, Henkun ; Sun, Delin ; Zhang, Rumin
Author_Institution :
State Key Lab. of Electr. Insulation for Power Equipments, Xi´´an Jiaotong Univ., China
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
Keywords :
insulation testing; machine insulation; machine testing; monitoring; pulse height analysers; spectral analysers; transducers; turbogenerators; broadband current transducer system; broken strand; cavity discharges; endwinding discharge; frequency spectrum analyzer; generator insulation system; on-line monitoring; partial discharges; pulse height analyzer; stator winding; time domain spectrum; turbine generator; Analytical models; Condition monitoring; Frequency; Insulation testing; Partial discharges; Pulse generation; Spectral analysis; System testing; Transducers; Turbines;
Conference_Titel :
Electrical Insulating Materials, 1995. International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
4-88686-047-8
DOI :
10.1109/ISEIM.1995.496547
