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Package V : 110/22KV Substation and 110KV Transmission
he Scope of Works listed below is for the construction of the 110/22 kV GIS (Gas Insulated Switchgear) Substation/Operation Control Centre for the Hai Van Pass Tunnel and 110 kV Transmission Line in the framework of the Hai Van Pass Tunnel Construction Project is intended to give the description of the Works required.
1. 110/22 KV GIS SUBSTATION/OPERATION CONTROL CENTRE AND ASSOCIATED FACILITIES
2. ELECTRICAL AND CONTROL SYSTEMS
2.1 HIGH VOLTAGE SYSTEM
Single busbar configuration 123 kV rated indoor GIS type
2.2 MEDIUM VOLTAGE SYSTEM
Single busbar configuration metalclad 24 kV rated indoor
GIS type switchgear with:
2.3 LOW VOLTAGE SYSTEM
Main LV Distribution Board
2.4 STANDBY POWER SUPPLY SYSTEM
Two (2) Diesel Generator sets 1000 kW each
2.5 SUBSTATION EARTHING AND LIGHTNING PROTECTION SYSTEMS
Complete 110/22 kV GIS Substation/Operation Control Centre Primary and Secondary Earthing and Lightning Protection Systems.
2.6. TELECOM SYSTEM
Complete Telecom System for 110/22 kV GIS Substation/Operation Control Centre successful operation.
2.7. ACCESS CONTROL SYSTEM
Complete Access Control System for 110/22 kV GIS Substation/Operation Control Centre successful operation.
2.8. RACEWAY NETWORK FOR SCADA SYSTEMS
Complete Raceway Network for various tunnel SCADA systems' cabling to the Control Room, Operators' and/or Engineer' premises (Tunnel Power Monitoring and Control, Tunnel Ventilation Control, Tunnel Traffic Control, Fire Alarm and Detection, CCTV Surveillance, Public Address and Radio Rebroadcast, Tunnel SOS Telephone, etc.). The Raceway Network shall accommodate all required cabling (including Substation/Control Centre own) with allowances up to 100% expansion.
3. 110 KV POWER TRANSMISSION LINE
110 kV Power Transmission Line shall be constructed from
3.1. 110 KV OVERHEAD LINE CONDUCTORS AND ACCESSORIES
The current-carrying conductor shall consist of ťaluminium strands reinforced with a core of galvanised steel wires (ACSR), the earthing wire shall be stranded galvanised steel wire (GSW).
3.3. UNDERGROUND 110 KV TRANSMISSION LINE
300 m from the 110 kV Substation/Operation Control Centre
the Overhead Transmission Line shall be transferred to the
Underground Transmission Line.
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