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Transcript of designing of transmission line
8/6/2019 designing of transmission line
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PRESENTATIONPRESENTATION
R.K.G.I.T. Gzb.
ARUN PRAKASH
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K.I.E.TK.I.E.T
SEMINARSEMINAR
DESIGNING OF TRANSMISSION LINE
PRESENTED BY
ARU N PRAKASH
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INTRODUCTION INTRODUCTION
ELECTRICAL POWER SYSTEM
TRANSMISSION AND
DISTRIBUTION SYSTEM
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SELE CTION OF SYS T EM SELE CTION OF SYS T EM
VOLTAGE VOLTAGE
Voltage selection f or the design of transmission line depends on the f ollowing f actor s:
power to be transmitted .
Length of the transmission line.Power f actor .
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Permissible loading & stability Permissible loading & stability
limitslimits SIL of the line is the power delivered by the line to purely resistive load equal in value to the surge
im pedance of line, Surge is the motion of charge in conductor .
Surge im pedance is characteristic im pedance of line.
Surge im pedance is independent of the line.
The load at which the inductive & capacitive (var)
are equal & opposite is called SIL of the line.
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SELECTION OFSELECTION OFCONDUCTORSCONDUCTORS
Properties of conductor material
ACSR conductor s1. Corona losses reduced
2. Steel core provides long s pan and
mechanical strength . Sk in eff ect.
Conductor chosen ACSR is LYNX of Dia 90.53 mm.
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CORONA AND RADIOCORONA AND RADIO
INTERFERENCEINTERFERENCE
Factor s aff ecting corona
1. Conductor sur f ace gradient .
2. Condition of conductor sur f ace.3. Atmos pheric conditions.
Factor s used f or controlling corona
1. Voltage of the line.
2. S pacing between the conductor s.
3. Conductor diameter . Use of bundle conductor to reduce corona.
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TOWER DESIGNTOWER DESIGN
Guyed or stayed tower sTy pes of tower s
1. Sus pension tower
2. B ty pe ( Angle tower)
3. C ty pe (angle tower)
4. D ty pe (dead end tower)Self supporting tower s.
Minimum ground clearance = 7 m
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V oltage regulation &V oltage regulation &
performance evaluation performance evaluation
Per f or mance of the transmission line is dependent upon three parameter s.
1. Calculation of sending end voltage ,current.
2. Power f actor loss in transmission line voltage
regulation.
3. Limits of power f low during steady state &
transient conductor s.
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S ub
S ub- - station designstation design
Su b station will have a large networ k
consisting mainly of bus bar s , protective switch
gear , transf or mer s & other accessories. Ty pe of su b stations
1. Accor ding to mounting
2. Accor ding to f unction 3. Accor ding to control
4. Accor ding to equipment