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Shibo 500 kV cable Project Shanghai China

D. Dubois

Fall 2007 PES-ICC Meeting

Scottsdale, AZ, November 4-7, 2007

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500 kV Shibo Project in Shanghai

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Brief description of the Project

Project Owner : Shanghai Municipality Electric Power Co.

Installation of a new 500 kV circuit in a tunnel

Tender date : 2006, August 31st

Contract coming into force: 2006, November 28th

Contract period:

Supply: 24 months

Installation: 18 months

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Scope of the Project

2500 mm copper XLPE 500 kV cablewith smooth aluminium sheath and fireretardant jacket.

One circuit (17km long) in a tunnel

Total cable length : 51 km (81 drums)

78 joints

6 GIS terminations

Cable system design, type test Supply of cable and accessories

Design of cable clamp and cablemetallic support

Supervision of cable laying Training of customers fitters.

Technical support, supervision andinstruction for mounting ofaccessories.

500 kV circuits

500 kV joints

220 kV circuits

3.5 m138 inches

220 kV joints

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Schematic diagram

635 m (2083 ft)

Major section: 1905 m (6250 ft)

9 Major Sections: 17.2 km (10.7 miles)

Earthing cabinetwith SVL's

GISsealing

ends

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Cable design

Current carrying capacity: 1800 A

Max ambient temp. 40C

Short-circuit current:63 kA for 2 sec.

BIL: 1550 kVbut test level is 1675 kV

2500 mm (5000 kcmil) CopperMilliken, 6 segments

30.4 mm (1197 mils) XLPEinsulation

Smooth Aluminum Sheaththickness 2.2 mm (87 mils)

HFFR (Halogen Free FireRetardant) outer jacket.Thickness 5.5 mm (217 mils)

Outer diameter: 152 mm (5 in.)

Weight: 39.6 kg/m (26.6 lb/ft)

ConductorMilliken, 6 segments

InsulationDry curing XLPE

Smooth Aluminiumlaminated Sheath

HFFR sheath

Extruded SC skin

Insulation screen

Conductor screen

Semi-conductingWater-swelling Tapewith EmbeddedCopper Wires

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Cable reels

Steel drum with a metalliclagging

Outer diameter is limitedto 4.3 m (14.1 ft)

New handling equipmentfor wide reels.

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Accessories

Cross-bonding Joint

Heavy Outer Protection design

With integrated PD sensor

PD Sensor

HDPE protection Copper shieldFilling jelly

PD connectioncabinet

EPDMpremoulded body

Metallic screeninterruption

Coaxial bonding lead

GIS Sealing End

Oil filled with a pressuremonitoring system

Bondinglead

High voltageconnection

EPDM stressrelief cone

Expansion tank

Oil filledGIS sealing end

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Type Tests Program

Electrical type tests are based on IEC 62067

Lightning impulse test: 1675 kV, Switching impulse: 1300 kV

The Cable Jacket must comply with IEC 60332-3 category A.

A special compound has been developed by Nexans to complywith the fire requirements and the physic & chemical requirements.