8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 1/12

PRESENTATIONPRESENTATION

 R.K.G.I.T. Gzb.

 ARUN PRAKASH 

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 2/12

K.I.E.TK.I.E.T

SEMINARSEMINAR

DESIGNING OF TRANSMISSION LINE

PRESENTED BY

ARU N PRAKASH

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 3/12

INTRODUCTION INTRODUCTION 

ELECTRICAL POWER SYSTEM

TRANSMISSION AND

DISTRIBUTION SYSTEM

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 4/12

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 .

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 5/12

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.

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 6/12

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 7/12

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.

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 8/12

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.

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 9/12

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

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 10/12

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.

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 11/12

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

8/6/2019 designing of transmission line

http://slidepdf.com/reader/full/designing-of-transmission-line 12/12

THANK YOUTHANK YOU

ANY QUERIES ?