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Auxiliary Power Supply System

Auxiliary Power Supply System. By CGS Gunasekara. Content. Why auxiliary supply is needed ? Equipments supplied through auxillary. Modes of operation. Demonstration of operation. Why auxiliary supply is needed ?

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Auxiliary Power Supply System

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  1. Auxiliary Power Supply System By CGS Gunasekara

  2. Content • Why auxiliary supply is needed ? • Equipments supplied through auxillary. • Modes of operation. • Demonstration of operation

  3. Why auxiliary supply is needed ? To supply power to generator/turbine and other ancillary equipments for their operation.

  4. Equipments supplied by auxiliary. Common supplies • Lighting system • Annunciators & indicators, alarms • Ventilation system (supply fans, Exhaust fans) • AC system (compressures, blower fans) • Battery charging system (220 V , 48 V) • Drainage pumps • Communication system

  5. Turbine & Generator • Instrumentation (metering) • Protection relays • Bearing oil pumps • Air compressors • (to operate governor equipment • Turbine , break system) • Cooling water pumps (stator coolers, bearing oil coolers) • Bearing oil pumps • Generator Heaters

  6. General Layout Diagram

  7. Modes of operation (1) From 220 KV bus through main T/F1,2,3 and through HAD3,5, or 6 (to both ESS & Non-ess sides) (2) Generators through HAD3,5 or 6 (to both ESS & Non-ess sides) (3) DG ( only to ESS side, can not extend to Non-Ess side)

  8. *Voltage : 220 KV bus voltage 13.8 KV 11 KV400 V 3 ph

  9. *Voltage : generator voltage 13.8 KV 11 KV400 V 3 ph

  10. * Voltage : through DG T/F 400 V step up to 11 KV 400 V 3 ph

  11. Demonstration of operation Auxiliary supply system demonstration.exe Note: To run the exe file, 1. Down load the APSS.rar file . 2. Unzip that file to the same folder where APSS.ppt is available. 3. Now, click above link

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