TRANSFORMER CONDITION ASSESSMENT ANALYSIS (BATCH #4)

OVERVIEW
In the electric power supply industry, the role of power transformers has a strategic role. Compare to distribution transformers, power transformers have a different operation condition because on power transformer there are on load tap changer (moving context) and power transformers operate at the end of high voltage transmision lines where lightning strokes hit frequently on transmission lines creating travelling waves which could enter power transformers and create damage. Therefore installing lightning arrester in front of power transformers is very essentials.

OBJECTIVE
On completion of this course, engineers an technicians will have a comprehensive understanding of the principles of transformer maintenance objective, transformer insulation system, capability of transformer against thermal and mechanical stress, transformer monitoring technique for ON and OFF line operation.

CONTENT

1. 1. Bagian-bagian utama dari transformator:
      • Bushing
      • Clamp penyambung
      • Kondensor pada bushing
      • Minyak bushing
      • Kumparan primer dan sekunder
      • Isolasi kumparan
      • Pengukuran isolasi
      • Tangki transformator
   2. Minyak transformator
      • Susunan kimia minyak transformator
      • Tegangan tembus
      • DGA (Dissolve Gas Analysis)
      • Tes kimiawi
   3. Proteksi transformator
      • Proteksi terhadap gangguan di luar transformator
        • Relai arus lebih
        • Relai arus hubung tanah
      • Proteksi terhadap gangguan di dalam transformator
        • Relai diferensial
   4. Buil-in protection
      • Reali bucholz
      • Relai sudden pressure
      • Relai suhu kumparan
      • Fire protection
      • Explotion valve
   5. The role of power transformers
      • Construction and working principles
      • Main parts of power transformers
      • Losses in power transformers
      • Weak points of power transformers
      • Technical specification of power transformers
      • Insulation coordination
   6. The objective of maintenance:
      • Development of maintenance methodes
      • What is condition base maintenance
      • Oil transformer construction
   7. Paper/cellulose and insulating oil Properties:
      • Chemical
      • Dielectric strength
   8. Maximum loading of oil filled transformer:
      • The capability of transformer against non-sinusoidal load
      • Transformer aging v/s winding temperature
   9. Transformer through fault (external short circuit fault)
   10. IEE guide for the interpretation of gases generated in oil-immersed transformer
   11. Transformer winding and core deformation derection utilizing SFRA technique
   12. On-line monitoring:
       • Transformer non-sinusoidal load measurement and interpretation
       • Transformer overall temperature profile/thermal image and interpretation
       • Moisture in oil measurement
   13. Off-line monitoring
       • Measurement of main winding and bushing insulation power factor dissipation
       • Winding and core displacement measurement
   14. Operational problems
       • On load tap changer
       • Automatic voltage regulator
       • Requirements for paralel operations
       • Protection of transformers
   15. Praktek

PREREQUISITES

Participants should be undergraduate electric power engineer with 2 years experience in operation and maintenance.

But any experienced engineer who has the same level of knowladge and experiance are welcome.

CERTIFICATION

• Sertifikat kehadiran dari SMARTGATE