400kv hadala getco substation
TRANSCRIPT
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Substation visit
At HADALA 400 kv
By: NIDHI MARU
AKASH THAKAR
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SUBSTATION:
A substation is a part of an electricalgeneration, transmission,
and distribution system. Substations transform voltage from high to low, or the
reverse, or perform any of several other important functions.
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SITE
At hadala ,14 km from MEFGI.
400 kv input line (double busbar) and 220kv (output)
Connected in ring main system of hadala – amreli – varsana
Has been Established in 2007
Incoming line from generating station (adani(95),varasana(161),essar-
vadinar(282,287) )
Outgoing line from HADALA substation (chorania(146),amreli(245))
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Busbar system
Double busbar in incoming line and one extra transfer bus is being used .
Fully numerical protection to all the line.
Transfer bus can serve only in replace to one bus bar
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Components
At incoming line
1. Wave trap
2. Cvt (capacitive voltage transformer )
3. Reactor (100mvar ),(for ferrenty effect)
4. Lightning arrester (ring type structure can be use at the time of lightning )
It has property of low resistance path during high voltage
ZNO2 material is used (normally solid state)
5. Central bus isolator
6. C.B.(SF6)
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Transformer (315 mva )
Protection system – world class
Operating time of c.b. 80 msec
Fault detection time 30 msec
LBB protection was used if the line c.b. fails to operated (as a backup proctection)
Autorecloser at outgoing line (one try only)
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Control room
Control panels for detection of current voltage reactive and real power
Relay room was inside the control room
Relay room has DAS(DATA AQUISATION SYSTEM) system
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Battery room
Battery room for the powering all the numerical relays and control room
operation
Two system of battery – 1. 50v 1000AH (each cell 2v)
2. 220v (for all the auxillary)
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BATTERY ROOM
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SUBSTATION DESIGN
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SUBSTATION
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GROUNDING GRID
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