erection of transformer and reactor
TRANSCRIPT
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TRANSFORMER
REACTOR TRANSPORTATION
UNLOADINGERECTION
BY:
Mohd.Kalim.Akhtar
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A transformer is a device that transfers electrical
energy from one circuit to another through
inductively coupled conductors — the transformer's
coils.
It is based on two principles:1. An electric current can produce a magnetic field
(electromagnetism)
2. A changing magnetic field within a coil of wire
induces a voltage across the ends of the coil(electromagnetic induction).
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CONVERTER
TRANSFORMER
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HVDC Converter
Transformer The HVDC (high voltage direct current)
converter transformer is a key component in anHVDC transmission system.
It is used to transfer power between two voltagelevels.
It provides galvanic separation between the ACand DC systems.
A fairly large tapping range permits optimumoperation even for a large variation in loadwithout loss of efficiency.
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TRANSFORMER/ REACTOR
TRANSPORTATION, UNLOADING,
ERECTION
Main tank without oil is
transported on
• Ship
•Trailer
•barge in canal/river5
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TRANSPORTATION
ROUTE SURVEY
PERMISSION FROM LOCAL AUTHORITIES
PERMISSION FROM PWD/NHAI
STRENGHTENING OF CULVERTS
SHUT DOWN OF ELECTRICAL LINES
CONSTRUCTION OF DIVERSIONS
CROSSING OF MAJOR TOWNS INNIGHT HOURS
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A single transformer came on a trailor having 128 wheels
Weights in kg:
Total weight 486 000 kg
Shipping weight 335 000 kg
Oil weight 113 000 kg
Untanking mass 285 000 kg
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Rated power: 498 000 / 249 000 / 249 000 kVA
Rated voltage ratio:
400 000/√3 V + 19.8 % - 6.6 % in + 24 steps - 8 steps // Number of position-33(33-9-1)
211 100/√3 V / 211 100 V
Vector group: I i0 i0
No-load losses:230 000 W
Cooling method: ODAF ( Oil directed air forced)
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Transformer being brought on rail-cum-
road
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Transformer being brought on rail-cum-
road
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UNLOADING
PROPER CAPACITY HYDRAULIC
JACKS
SUFFICIENT QUANTITIES OF
SLEEPERS
GOOD QUALILTY RAILS
EXPERIENCED MANPOWER PULLING TOOLS LIKE FOURESHEEV
PULLY STEEL ROPES
ARRANGEMENT OF DEAD MAN FOR11
t
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n oa ng o onvertertransformer
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Transformer rested on
slippers
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Transformer rested on
slippers
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Trailor being gradually brought
down and taken out
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Trailor ready to move out
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Trailor being taken out
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Trailor completely removed
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Additional slippers being put to
bear the weight of transformer
Fi ll t f ti
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Finally transformer resting on
few slippers waiting to be moved
to the foundation
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REACTOR ON RAIL
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ON UNLOADING AT SITE
CHECK THE EQUIPMENTS AS PER
CHECK LIST
IMPACT RECORDER TO BE CHECKED
JOINTLY WITH SUPPLIERS
REPRESENTATIVE AND TO DOWN
LOAD DATA
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CHECK LIST
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PRELIMINARY CHECKS OF
TRANSFORMER AFTERUNLOADING
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Checking the moisture in the
tank
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Check the nitrogen pressure in
the tank
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Take the readings of impact recorder to check any
sudden and heavy impact occurred during transportation
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IMPACT RECORDER
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Checking the healthiness of insulation
Apply a DC voltage of 500 Volt between the terminal bushings for a period 1 min., until the
insulating resistance is quite stable.and measure the insulating resistance between thecore and frame.,the core and earth and between the frame and earth.
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CC-CL-G INSULATION
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Erection of transformer
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Scaffolding is to be prepared
before erection
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Ladder erected at first
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Bottom side headers being connected
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O-ring being glued before putting the header
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Oil present from before to avoid rusting
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All the headers erected
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Supporting pipes of coolers being erected
T b i d f
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Turrets being opened for
erection
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Turrets being checked,cleaned and aligned
before erection
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Turrets being taken up to be erected by
chain pulley arrangement
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Inside view of the turret
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O-ring being put and the turret being
cleaned before erction
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This is one step further
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Last stage of final fixing the turret
T Y1 b i b h d b
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Turret Y1 being brought down to be
opened for preliminary check
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After opening the bottom portion
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Alignment being checked
Th i di hi h t t t b i
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The core windings which go to turret being
cleaned
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Inside view of the transformer from Y1 end
T i l h i ll t f
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Typical chain pulley arrangement for
slanting turrets
Y1 t t b i i d t d ti ti b
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Y1 turret being carried to destination by
chain – pulley arrangement
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Finally Erected
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HV turret on the top of transformer
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HV turret being brought for erection
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Inside view of the turret
E ti h d d i th t f
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Erecting headers and pipes on the top of
transformer
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Header in continuation
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Pipes being erected
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Some other pipes
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Few others
Pipes connecting OLTC PRD
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Pipes connecting OLTC,PRD
also being connected
Support structures for conservator being
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Support structures for conservator being
erected
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Next step
N2 filling to maintain the tank
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N2 filling to maintain the tank
pressure during erection
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Air cell being connected
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Air cell being fitted inside the conservator
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N2 gas being filled in the air cell
Conservator lifted to its position and
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Conservator lifted to its position and
erected
Overpressure relief device being examined
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Overpressure relief device being examined
before erection
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Overpressure relief device
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Overpressure relief device
erected
l b i k f i
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Cooler being taken for erection
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Th i h h hi h h il ill fl
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The pipes through which hot oil will flow
8 l t d
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8 cooler groups erected
S i i f l d
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Supporting pipes of coolers erected
Transformer erection completed apart from
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Transformer erection completed apart from
bushings which would be done on the foundation
VACCUM & OIL FILLING
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VACCUM & OIL FILLING
Vacuum of main tank
Preparation of oil
Oil filling
Oil Circulation
Vacuum and oil filling in radiator
Mixing of radiator and main tank oil Ready for pre-commissioning test
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