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©AB
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www.abb.com/hvdc
Station Design& Layout
Kjell Eriksson
Project Manager
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Simplified single line diagram bipolar converter station
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Converter transformer allocation
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Inside view of Valve Hall
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Monopolar converter station
210 m
4,5 m265 m
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Layout of a bipolar converter station of 500 kV, 2000 MW
330 m
385 m
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DC switchyard
The DC switchyard contains all the external equipment neededfor an HVDC transmission: Voltage dividersCurrent measuring devicesSmoothing ReactorsDC Filters
Transmissions with cables (underground or underwater) doesnot require any DC filter. Transmissions with OH typicallyrequire DC filters to prevent the harmonics generated by the converter to be transported along the DC line. A harmonic filter for 12th and a high pass is usually enough.
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Substation Earthing
The converter station is connectedwith the earth in a grid of groundwires (cu).
All apparatus and structures are connected to the earthing gridfrom the station as a securitymeasure.
Prevents dangerous potentials to establish in occurrances of lightnings, short circuits and transitional currents at commutations
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Protection against lightning
The apparatus in the converter station are protected againstlightning by a network of shield wires
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System bus
The buses are fixed or flexible. Connection joints are designed to withstand forces of short circuits, the earthquakes, and the winds and loads of ice. The telescopicconnection between the valves is particularly capable to withstand seismic forces.
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Typical HVDC Station
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Layout of Monopolar Station
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Layout of Bipolar station
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Valve hall Fire protection
Recommended fire protectionDeluge system for transformersInergen fire fighting, valve hall
Water mist systemSmoke detectionFlame detection
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Acoustic design
Calculation regarding sound levels
Specify requirements regarding noise levels for apparatus
Specify noise limiting measures (screening)
Measurement and analysis of sound levels
FILTER 24/36
FILTER 24/36
FILTER 24/36
FILTER 11/13
FILTER HP3 FILTER 11/13
FILTER 11/13
FILTER HP3
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Scale 1:344600 15 30 60 90 120m
Longquan (5)
LegendIndustrial sources point
Industrial sources line
Industrial sources area
Main building
Screening edge
Noise levelin dB(A)
<= 45.045.0< <= 47.547.5< <= 50.050.0< <= 52.552.5< <= 55.055.0< <= 57.557.5< <= 60.060.0< <= 62.562.5< <= 65.065.0< <= 67.567.5< <= 70.070.0< <= 72.572.5< <= 75.075.0< <= 77.577.5< 80.080.0<
SoundPLAN
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Calculations with SoundPLAN
•Data in 3D model
•Data required•Arrangement of station and ambient location
•Buildings
•Sound sources
•Sound potential
•Location and extension
•Frequency content
•Directivity
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All transformers boxed in
800 kV converter
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Verification of earthquake design
The verification is basically by calculations of earthquake forces.
A simple mechanical testing is often done to measure mechanicaldamping and resonance.
In special cases it is tested in a vibration table.
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Earthquake
In the New Zealand projectequipment withstand 0.5 g
Some components are suspended, for examplethyristor valves and DC filter capacitors.
Transformer and wallbushings are specificallydesigned for earthquake
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Itaipú
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Longquan Converter Station, Panorama View
Converter Station size: 600m x 360m
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Longquan AC Filters
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Three Gorges – Guangzhou, Jingzhou
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Double Valves 500 kV DC, Zhengping
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Longquan - Double Valves & Converter Transformers
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Chandrapur site
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Chandrapur ac yard
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Baltic Cable, Kruseberg
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Baltic cable, ac side
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Baltic Cable, dc yard
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New Zealand, ac filters
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New Zealand, dc filter
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New Zealand, sound barriers
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New Zealand, smoothing reactor
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New Zealand, valve hall
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Brazil - Argentina, Modular valve housings
Converter Transformers including one spare
Capacitors for CCC
Modular ValveHousings
Cooling Towers
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