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2G/W OPGW Live-Line Installation2G/W OPGW Live Line Installation
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Contents:
•• OPGW System OverviewOPGW System OverviewOPGW System OverviewOPGW System Overview•• LiveLive--Line InstallationLine Installation•• LiveLive--Line Installation MethodLine Installation MethodLiveLive--Line Installation MethodLine Installation Method•• LiveLive--Line Installation MethodLine Installation Method
under Non GW Conditionunder Non GW Conditionunder Non GW Conditionunder Non GW Condition•• Safety EvaluationSafety Evaluation•• PicturesPictures•• PicturesPictures
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OPGW System Overview OPGW System Overview OPGW System Configuration
OPGW system makes a nationwide communication network possible b d th h d t d t t itbased on the overhead systems used to transmit power.
Tower FittingOPGW
Suspension Tower
Tension Tower
Gantry Tower
Optical Terminal Equipment
J i tTransmission Solar Power
J i tJoint box
Line Cell Array plant
Optical
Joint box
Joint Enclose for Underground
Non-MetallicOptical Fiber Cable
OpticalRepeater
UndergroundShelter
Battery &Controller
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g
< Terminal Station > < Repeater Station > < Terminal Station >
OPGW System Overview OPGW System Overview Application of OPGW
G d WiGround Wire
Communication between Power Systems
Monitoring and Controlling of Power System
Data Transmission with Large Capacity and High Speed
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ELSEWEDY LiveELSEWEDY Live--Line InstallationLine Installation
The Necessity of Live-Line InstallationActive internet marketActive internet marketDemands for replacement of existing GW to OPGWInsufficiency of electric power capacityy p p y
Live-Line Installation MethodFull Live-Line InstallationEnsure safety for workers and transmission line by using Safety Analysis Programusing Safety Analysis ProgramGuarantee high quality and easy access of installation equipment
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LiveLive--Line installation ProcessLine installation Process
Replacing the existing ground wire by OPGW without power outage on double Replacing the existing ground wire by OPGW without power outage on double circuit transmission linecircuit transmission line
PROCEDURE
PreparationPreparation
Installation of Supporting rollers
OPGW stringing
Turn-over & Sagging
Retrieval of Support rollers and the disconnecting ropethe disconnecting rope
Jointing & Testing
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LiveLive--Line installation MethodLine installation Method Major Equipment
Guide Rope-. Nominal diameter : 10mm-. Max. Breaking strength : 2ton
Pulling Rope-. Nominal diameter : 14mm-. Max. Breaking strength : 4ton
Supporting Roller-. Length : 350mm-. Roller diameter : 36mm-. Roller material : Aluminum
-. Running speed. 30 m/min
Mobile UnitRecovery Machine
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g p-. Climb angle. maximum 31 degrees-. Weight. 34g
-. Load limit : 12㎏f or more60㎏f or more
LiveLive--Line installation MethodLine installation Method Accessories
Swivel
Dead-end Stocking
Pulley Block
Earthing Roller
Drum Stand
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Engine Winch
LiveLive--Line installation MethodLine installation Method Accessories
Vibration Damper
Tension Assembly Set
Suspension Assembly Set
Fixing ClampJoint Box
www.elsewedy.com Tension Tower Tension Tower Suspension Tower Tension Tower
LiveLive--Line installation MethodLine installation Method Preparation
Install OPGW drum with stand at the drum field and puller at the engine field.
Preparative equipment, fittings along the situation of working field.Th t i i bl k b tt h d t th t d b tt t f tThe stringing block be attached at the top and bottom part of tower.
Ch k h l b i i d i d li li b fCheck the clearance between existing ground wire and live-line before stringing.
The exercise been already done and recorded during the survey ground wire condition must be check again prior to start of installation.condition must be check again prior to start of installation.
Remove the existing aerial spheres and vibration damper etc.Intervals of 10~20m to be maintained between supporting rollers.
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LiveLive--Line installation MethodLine installation Method Installation of supporting roller
Install supporting rollers using a mobile unit between spans. The mobile unit be shifted fromhigher tower to lower tower.
Install supporting rollers on the top of the towerInstall supporting rollers on the top of the tower.
Existing Ground wire
Mobile Unit
Supporting RollerPulling RopeGuide Rope
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LiveLive--Line installation MethodLine installation Method OPGW Stringing
Fixing of supporting roller between towers by guide rope
Use swivel(2ton) for connecting OPGW
OPGW Stringing by using engine puller and reel winder (Pulling Tension Max.500kg)
Existing Ground wire
Guide Rope
Pulling RopeOPGW
Swivel
Pulling Rope
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LiveLive--Line installation MethodLine installation Method Turn-Over & Sagging
Upset the OPGW at the position of exist ground wire using chain block tension equipment.
Chain blockGround Wire
OPGW
OPGWCome-along
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LiveLive--Line installation MethodLine installation Method Remove exist ground wire
Connect pulling rope to end of ground wire, and then withdraw ground wire.
G id R
OPGW
Guide Rope
Pulling Rope
Existing Ground wire
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LiveLive--Line installation MethodLine installation Method Retrieving supporting roller
Regain the pulling rope and supporting rollers to opposite direction between each span.
Retreat the pulling rope on ground by pulling the Pulling rope with uniform speed by manpower.Retreat the pulling rope on ground by pulling the Pulling rope with uniform speed by manpower.
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Safety EvaluationSafety Evaluation
Investigation of Tower & G.W conditions
S f t d t f kSafety gadgets for workmen
Fixing of warning Flags
Grounding of equipmentGrounding of equipment
Clearance between Mobile unit and Conduct, OPGW and Conduct
Minimum Clearance Distance for Live Line
Safety Evaluation by Simulation Program
Electrostatic Induction
Electro magnetic Induction
Dry Band Arcing Phenomenon
Dynamic Sag/Tension during Installation
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y g g
Safety Evaluation Safety Evaluation Minimum Clearance Distance(ex.malaysia)
Bare hand Maintenance
Minimum Clearance Distance for Live Line
Voltage WorkingBare hand Maintenance
132kV 2440
Phase to Ground Phase to Phase
1067 1524132kV 2440mm
275kV 3050mm
500kV 3700mm
1067mm
1740mm
3030mm
1524mm
4000mm
6096mm500kV 3700mm 3030mm 6096mm
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Safety Evaluation Safety Evaluation Span Length of Supporting Roller(ex.malaysia)
1.4591.3361.2751.1531.0911.030.9080.8460.790.660.540.480.36D
201817151413111097542S [m]
Sag Value in Accordance with Span Length
8.2347.4347.0346.2345.8345.4344.6344.2343.833.032.231.831.03D”(S'=S*80%)
10.239.2348.7347.7347.2346.7345.7345.2344.733.732.732.231.23D’(S'=0)
1.4591.3361.2751.1531.0911.030.9080.8460.790.660.540.480.36D
S’
S10m 0m
D D’ OPGW or Rope7.55m
0.846 0.710
Minimum Clearance (1.74m)
4.964
D”
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Minimum Clearance (1.74m)D
[ Span length for 275kV T/L (Tower Type 24LA) ]
Safety Evaluation Safety Evaluation Grounding from Inducing Voltage
During stringing operation, all OPGW shall be grounded by using ground roller.
[ Ground Roller]
OPGW Drum
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Safety Evaluation Safety Evaluation Dry Band Arcing In Rope
Dry band arcing phenomenon occur by potential differencealong the insulation rope during installation process This phenomenon can be estimated by programand can be prevented by allocating supporting rollers
Arc occurp y g pp g
Dry BandBurning of
rope occurs in
Wet Wet Rope
rope occurs in this region by
Tracking
Potential
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Leakage Current
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