Power Former 2003

ByPavan Mulani

Kamal SinghViranchi Kumar Mishra

Chandra PrakashPrashant Makwana

Samir SarvadiJawahar K

GET-APL

Objective

To introduce a new device to provide direct connection to the high-voltage power grid without using a step-up transformer.

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Contents Introduction Construction Cable construction Cooling system Fault current behavior Merits and demerits Conclusion

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What is powerformer ?

Powerformer is same as generator but only difference in construction.

GeneratorTransform

erPowerforme

r

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Conventional Vs. Powerformer

Conventional system

System with Powerformer

1. Generator2. Generator

Circuit breaker3. Surge arrestor4. Transformer5. Circuit breaker

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ConstructionPowerformer Conventional

Stator winding:

1.High voltage cable 2.XLPE insulation3.Only Cylindrical winding

Stator winding:

1. Copper bars2. Paper insulation3. Rectangular

Rotor winding is same in both the systems

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Cable Construction

1) Conductor2) Inner semi conductor layer3) XLPE insulation4) Outer semi conducting layer04/11/23 8Powerformer

Nature of electric field

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Cooling system

Cooling done at zero potential Tap water can be usedXLPE pipes used axiallyNo radial ductLess risk of short circuit

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Fault current behavior

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Currently used

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MeritsHigh efficiencyLow lossMore reliableLow environment impact

Demerits Occupies Large volume More expensive

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Conclusion

Direct connection to power grid without using transformer

Can generate power upto 220 kVSlot size decreases due to less insulationEconomical, reliable and more efficientvery clean and compact power plant

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Thank you

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