The document discusses the technical advantages of uprating existing transmission lines instead of constructing new ones, emphasizing minimized costs and environmental impact. It highlights the use of high-performance conductors to increase current ratings and the importance of equipment upgrades in maintaining safety clearances. Additionally, the implementation of modular designs reduces shutdown times during reconductoring, making uprating a cost-effective solution for handling increased load demands.

1. TRANSFORMING
EXISTING OLD LINES

2. IT BECOMES HIGHLY PERTINENT TO
UPRATE OR UPGRADE THE ALREADY
EXISTING LINE RATHER THAN
CONSTRUCTING NEW TRANSMISSION
LINE.

3. TECHNICAL
ADVANTAGE
FOOT PRINT
REMAINS THE
SAME*
COST OF
ERECTION IS
MINIMIZED
VISUALLY
AESTHETICS
REDUCE COST
OF
MAINTENANCE
MINIMIZE
ENVIRONMENTAL
RESTRICTION
NO NEW LAND
ACQUISITION
COST
* If the foundation has to be strengthened, there may be a mere increase in foot print.

4. PROJECT PLANNING
IMPLEMENTANALYZE
STUDY
DESIGN
VALIDATE

5. UPRATING
RECONDUCTOR THE LINE USING
HIGH PERFORMANCE CONDCUTOR
INCREASE THE CURRENT RATING
OF THE LINE

6. HIGH PERFORMANCE
CONDUCTOR
 Carbon fibre core
 High operating temperature
 Ampacity twice as that of ACSR
 Low sag

7. Since HPC conductors operate at
higher temperature, they require special
type of hardware accessories. Supreme
has developed and conducted electrical
tests on conductor fittings, specifically
designed for HPC.

8. TEST SETUP

9. APPLIED
CURRENT
800 AMPS
APPLIED
CURRENT
900 AMPS
APPLIED
CURRENT
1000 AMPS
CURRENT INCREASED IN STEPS

10. START TIME 9:15AM
DATE 02.01.14
END TIME 10:00AM
DATE 04.01.14
CONDUCTOR TEMP. MEASUREMENT POINT- CH-4

11. DEAD END JOINT –A TEMP. MEASUREMENT POINT CH-1,CH-2 & CH-3
START TIME
9:15AM
DATE 02.01.14
END TIME
10:00AM
DATE 04.01.14

12. DEAD END JOINT –B TEMP. MEASUREMENT POINT
CH-5, CH-7 & CH-8
START TIME
9:15AM
DATE 02.01.14
END TIME
10:00AM
DATE 04.01.14

13. 85.2
108.5
117
127.7
135.5
142.7
149.2
158.1 158.6 158.9 159.2
26.3 28.8 30.0 31.4 32.3 33.2 34.0 34.9 35.6 36.4
36.9
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
0 5 10 15 20 25 30 35 40 45 50 55
TEMP°C
TIME IN HOURS
DEAD END JOINT
A & B
HIGH PERFORMANCE
CONDUCTOR
RESULT

14. Line uprating proves to be a smart
solution to cater the increased loads
on existing transmission lines.
However, this exercise is problematic
as the shutdown required for
reconductoring cannot be provided as
those lines are already critical.

15. USE OF ERS PROVED TO BE A VITAL SOLUTION FOR REDUCING
THE SHUTDOWN TIME DURING RECONDUCTORING.

16. MODULAR AND PORATABLE SECTIONS
MODULAR SECTION: 600X600X3000 mm
MATERIAL: HIGH STRENGTH STEEL
YIELD STRENGTH: 2x HIGH STRENGTH ALUMINIUM

17. CIVIL FOUNDATION IS NOT REQUIRED.

18. ERS HAS SIGNIFICANTLY
REDUCED THE SHUTDOWN TIME
REQUIRED FOR RECONDUCTORING

19. UPGRADING
NEED TO REPLACE SUBSTATION
EQUIPMENTS.
INCREASE THE VOLTAGE RATING
OF THE LINE
PROVIDE PROPER ELECTRICAL
CLEARANCE AS PER THE VOLTAGE
RATING

20. CLEARANCE
AC NOMINAL VOLTAGE 220 kV 400 kV
MINIMUM CLEARANCE ABOVE
GROUND
7 m 8.84 m
MINIMUM LIVE METAL
CLEARANCE
2.1 m 2.6 m
MINIMUM PHASE TO PHASE
CLEARANCE
2.1 m 3.9 m
ANGLE OF SHIELD (MAXIMUM) 300 200
MINIMUM MID SPAN CLEARANCE 8.5 m 9 m

21. When upgrading a tower, the new
required clearance will increase the
Right of Way. By making small
modification to the tower, the
required clearance can be obtained
without any change in the RoW.

22. TRANSFORMING 220 kV
LINE TO 400 kV LINE

23. DELTA
TRIANGULAR
EXISTING
TOWER
DELTA

24. INSULATED
CROSSARM
COMPOSITE INSULATORS ARE
DIRECTLY FIXED TO THE TOWER
CONDUCTORS SWING WILL BE
REDUCED SIGNIFICANTLY.
THIS REDUCES THE REQUIRED
LIVE - METAL CLEARANCE LEVEL

25. INTER PHASE SPACERS
PREVENTS CONDUCTOR GALLOPING
IN LONG TRANSMISSION LINES
MAINTAIN PHASE TO PHASE
CLEARANCE
REDUCES SHORT CIRCUIT PROBLEMS
ENCOUNTERED IN MANY HIGH
VOLTAGE LINES

26. RESULTS FROM TECHNICAL AND
FINANCIAL EVALUATION
Costs are substantially reduced when compared with the costs of a new line.
No land or right of way acquisition required
Minimum environmental impact.