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1. Presented ByPresented By
PraveenPraveen

2. INTRODUCTION:
POWER REQUIREMENT IS INCREASING DAY BY DAY DUE
TO THE MAXIMUM POWER UTILIZATION. IN ORDER TO MEET
THIS DEMAND A LARGE POWER HAS TO BE GENERATED IN AN
EFFICIENT WAY. A NEW MACHINE NAMELY “POWERFORMER”
CAN DO THIS. THE CONVENTIONAL PLANT GENERATED
VOLTAGE IS LIMITED TO 30KV. THIS VOLTAGE IS STEPPED UP
TO A HIGH VOLTAGE LEVEL IN THE ORDER OF 800KV WITH THE
HELP OF POWER STEP-UP TRANSFORMERS. THE STEP-UP
TRANSFORMER IMPOSES GREAT DRAWBACKS ON THE
POWER PLANT, STARTING FROM REDUCTION IN EFFICIENCY,
HIGH MAINTENANCE COSTS, AND MORE SPACE LESS
AVAILABILITY.

3. • DURING THE LAST CENTURY, A NUMBER OF ATTEMPTS
WERE MADE AT DEVELOPING A HIGH-VOLTAGE GENERATOR
THAT COULD BE CONNECTED DIRECTLY TO THE POWER
GRID, I.E. WITHOUT GOING ANY STEP-UP TRANSFORMER.
THE POWERFORMER HAS OPENED A NEW CHAPTER IN THE
GENERATION AND TRANSMISSION OF ELECTRICAL ENERGY.

4. OBJECTIVES:
• POWERFORMER CONCEPT
• INNOVATIVE DESIGN
• THE FIRST POWERFORMER
INSTALLATION
• ADVANTAGES OF POWERFORMER

5. POWERFORMER CONCEPT:
•POWERFORMER IS A NEW MACHINE, IT IS A 3-PHASE AC GENERATOR
WITH A ROTOR OF CONVENTIONAL DESIGN.
•THE DIFFERENCE COMPARED WITH CONVENTIONAL GENERATOR LIES IN
THE STATOR WINDINGS.
•IN POWERFORMER STATOR WINDING CONSISTS OF HIGH-VOLTAGE
CABLES INSTEAD OF TODAY’S WINDINGS WITH A SQUARE CROSS-
SECTION.
•BY USING HIGH-VOLTAGE CABLES AS GENERATOR STATOR WINDING, IT
IS POSSIBLE TO HIGHLY INCREASE THE GENERATED VOLTAGE.
•THE DECISIVE DIFFERENCE BETWEEN THIS DESIGN AND PRESENT-DAY
TECHNOLOGY IS THAT POWERFORMER ALLOWS DIRECT CONNECTION
TO THE HIGH-VOLTAGE GRID.

6. SCHEMATIC DIAGRAM OF A CONVENTIONAL PLANT WITH STEP-UP
TRANSFORMER (A), AND THE SAME PLANT WHEN THE NEW
TECHNOLOGY IS USED (B).
1. GENERATOR
2. GENERATOR CIRCUIT BREAKER
3. SURGE ARRESTER
4. STEP-UP TRANSFORMER
5. LINE CIRCUIT BREAKER

7. •THIS DESIGN IMPLIES THE OMISSION OF THE GENERATOR
CIRCUIT BREAKER, THE HIGH CURRENT BUS BAR AND THE
STEP-UP POWER TRANSFORMER FROM THE POWER PLANT,
BECAUSE POWERFORMER COMPRISES THE FUNCTIONS OF
BOTH GENERATOR AND STEP-UP TRANSFORMER AS
REALIZED FROM ABOVE FIGURE
•AS A CONSEQUENCE THERE IS AN INCREASE UP TO 1.5% IN
TOTAL ELECTRIC POWER EFFICIENCY COMPARED WITH
TODAY’S BEST DESIGNS, WITHOUT USING
SUPERCONDUCTIVE MATERIALS.

8. INNOVATIVE DESIGN:
•POWERFORMER HAS BEEN DESIGNED WITH SEVERAL
UNIQUE FEATURES THAT ALLOW IT TO EXCEED THE 30KV
LIMIT, INCLUDING A WINDING CONSISTING OF POWER
CABLES AND AN INNOVATIVE STATOR DESIGN.

9. POWERFORMER WINDINGS:
• THE WINDING CONSISTS OF A POWER CABLE WITH SOLID
INSULATION AND TWO SEMICONDUCTING LAYERS, ONE
SURROUNDS THE CONDUCTOR AND THE OTHER OUTSIDE
THE INSULATION.
•THE INSULATION MATERIAL IS CROSS-LINKED
POLYETHYLENE
• HIGH-VOLTAGE POWER CABLES ARE USED IN WINDING.
•THESE CABLES USED TO MANY ADVANTAGES OVER
CONVENTIONAL DESIGNS

10. A CROSS SECTION OF THE POWER CABLE USED IN THE
STATOR WINDING OF POWERFORMER:

11. POWERFORMER CABLE VERSUS CONVENTIONAL
RECTANGULAR CONDUCTORS:

12. NON CONVENTIONAL STATOR DESIGN:
THE STATOR OF POWERFORMER CONSISTS OF A LAMINATED
CORE.
THESE LAMINATED CORE ARE BUILT UP FROM ELECTRICAL
SHEET.
THE WINDING IS LOCATED IN THE SLOTS FORMED BY THE
TEETH, THE CROSS SECTION OF THE SLOTS DECREASES . THE
WINDING TURN REQUIRES LESS CABLE INSULATION THE
CLOSER IT IS TO THE ROTOR.
EACH SLOT HAS CIRCULAR BORES AT INTERVALS, FORMING
NARROW WAISTS BETWEEN THE WINDING LAYERS, AS
SHOWN IN FIGURE BELOW.

13. SECTION OF THE STATOR IN POWERFORMER:

14. THE FIRST POWERFORMER INSTALLATION:
•THE WORLD’S FIRST HIGH-VOLTAGE GENERATOR BASED ON
THE NEW TECHNOLOGY; A HYDROPOWER MACHINE IS
RATED AT 11 MVA, 45 KV, AND 600 RPM. THE MACHINE HAS
ALREADY BEEN TESTED IN THE FACTORY AND INSTALLED AT
THE PORJUS HYDROPOWER CENTER ON THE LULE RIVER IN
NORTHERN SWEDEN. THE MACHINE IS DIRECTLY
CONNECTED TO THE 45 KV TRANSMISSION POWER GRIDS;
ITS STATOR IS SHOWN IN BELOW FIGURE

15. STATOR VIEW OF THE FIRST POWERFORMER:STATOR VIEW OF THE FIRST POWERFORMER:

16. 1.It generates Low voltage
(<30kv)
1.It generates High voltage
(>>30kV)
2. High current 2. Low current
3. Stator has Short teeth 3. Stator Long teeth
4. High weight 4. Less weight
5. Mount winding is used 5. Thread cable is used
6. Impregnating windings 6. Extrusion type winding is used
7. High temperature 7. Low temperature
COMPARISON OF CONVENTIONAL GENERATOR AND
POWERFORMER:

17. •HIGHER EFFICIENCY
•LOW MAINTENANCE COSTS
• POWER TRANSFER FORM GENERATOR TO POWER
GRID WITHOUT GOING VIA THE STEP-UP
TRANSFORMER
•BETTER AVAILABILITY
ADVANTAGES OF POWERFORMER:

18. CONCLUSION:
ABB’S NEW HIGH-VOLTAGE GENERATOR (POWERFORMER) HAS BEEN
STUDIED THE NEW CONCEPT PROVIDES THE POSSIBILITY TO DIRECTLY
CONNECT A ROTATING MACHINE TO THE HIGH-VOLTAGE POWER GRID
WITHOUT GOING ANY STEP-UP TRANSFORMER. POWERFORMER IS A
HIGH-VOLTAGE GENERATOR; THE LIMITATION IN ITS RATED VOLTAGE
IS SET SOLELY BY THE AC
• POWER CABLE AND THE CABLE ACCESSORIES (TERMINATIONS AND
JOINTS) USED IN ITS STATOR WINDING. THIS MEANS THAT
POWERFORMER OF VOLTAGE RATINGS UP TO 400 KV CAN BE REALIZED,
ALTHOUGH HAS NOT BEEN PROVED YET.