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Monitoring in Electrical Rotating Machines - Case Studies
Conference on Electrical Power Equipment Diagnostics (CEPED)
Asia-Pacific Constant, CITRA
29-31 October 2013
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PD Measurement
• WHAT? • WHY? • HOW?
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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”
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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”
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PD comes from different factors
TEAM stresses of the insulation: •Thermal, temperature •Electrical, electric field •Ambient (environment) •Mechanical, vibrations
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How do we measure PD?
• Off-line measurement • On-line measurement
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PLTA Cirata
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PD Monitor
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PD Sensor
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Cirata Unit 7
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PDM Data Cirata 7 Phase R
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PDM Data Cirata 7 Phase S
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PDM Data Cirata 7 Phase T
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PD Analysis Tools
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Cluster 1
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Cluster 2
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Cluster 3
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Cluster 4
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Cluster 5
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Cluster 6 (Cluster 4)
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Cluster 7
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Stator Cirata Unit 7
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Slot No. 7
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Slot No. 44
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Slot No. 80
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Slot No. 99
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Slot No. 234
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Slot No. 252
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T H A N K Y O U