17 May 2019

Right of Way ( ROW ) In The Transmission Line

Right of Way ( ROW )

  • The right of way is a strip of land where the transmission line is constructed, erected, operated and maintain. 
  • The transmission line is kept in the centre of right of way ( ROW ). 
  • The right of way clears all trees, structure and construction which interference the power lines. 
  • The maximum width of ROW is calculated by considering transmission line voltage, wind speed, sag, tower design, swing and other safety consideration. 
  • The ROW is as per guideline of Ministry of Environment and Forest. The ROW for different transmission line is given as below in India.
Transmission Line Voltage
Right of Way in Meters
11 kV
7
33 kV
15
66 kV
18
110 kV
22
132 kV
27
220 kV
35
400 kV S / C ( Single Circuit )
46
400 kV D / C ( Double Circuit )
46
± 500 kV HVDC
52
765 kV S / C ( Single Circuit With Delta Configuration )
64
765 kV D / C ( Double Circuit )
67
± 800 kV HVDC
69
1200 kV
89

  • Only vertical Delta configuration of 400 kV S/C and Delta configuration of 765 kV S/C shall be permitted in the Forest Area.
  • The following width clearance would be permitted for below each conductor or conductor bundle.


Transmission line with bundle conductor
Width Clearance below each conductor or Bundle conductor ( meter )
Up to 400 kV Twin Bundle
3
400 kV Triple Conductor
5
400 kV / ± 500 kV HVDC / 765 kV Quadruple Bundle
7
± 800 kV HVDC / 765 kV Hexagonal Bundle
10

Minimum clearance between trees and transmission


Transmission Line Voltage
Minimum Clearance Between Transmission Line and Trees
11 kV
2.6
33 kV
2.8
66 kV
3.4
110 kV
3.7
132 kV
4.0
220 kV
4.6
400 kV
5.5
± 500 kV HVDC
7.4
765 kV D / C
9.0
± 800 kV HVDC
10.6
1200 kV
13

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