Monitoring in Electrical Rotating Machines - Case Studies
Conference on Electrical Power Equipment Diagnostics (CEPED)
Asia-Pacific Constant, CITRA
29-31 October 2013
PD Measurement
• WHAT? • WHY? • HOW?
What is Partial Discharge? According IEC 60270 partial discharge (PD) “localized electrical discharge that only partially bridges the insulation between conductors and which can or can not occur adjacent to a conductor”
Why do we measure PD? According IEC 60034-27-2: “For many years, the measurement of partial discharges (PD) has been employed as a sensitive means of assessing the quality of new insulation as well as a means of detecting localized sources of PD in used electrical winding insulation arising from operational stresses in service”
PD comes from different factors
TEAM stresses of the insulation: •Thermal, temperature •Electrical, electric field •Ambient (environment) •Mechanical, vibrations
How do we measure PD?
• Off-line measurement • On-line measurement
PLTA Cirata
PD Monitor
PD Sensor
Cirata Unit 7
PDM Data Cirata 7 Phase R
PDM Data Cirata 7 Phase S
PDM Data Cirata 7 Phase T
PD Analysis Tools
Cluster 1
Cluster 2
Cluster 3
Cluster 4
Cluster 5
Cluster 6 (Cluster 4)
Cluster 7
Stator Cirata Unit 7
Slot No. 7
Slot No. 44
Slot No. 80
Slot No. 99
Slot No. 234
Slot No. 252
T H A N K Y O U