lanka electricity co

8/13/2019 Lanka Electricity CO

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Electrical and Information Engineering

CONTENT

PAGES

Chapter 1

1.0 Lanka Electricity Company (pvt) Ltd 1

1.1 Introduction to LECO 1

1.2 History of LECO 1

1. LECO !ision 2

1." LECO #ission 2

1.$ LECO %uality &olicy 2

1.' ervice ssurances

1.* Or+ani,ation tructure

1.- /e ranc/ "

1. /e epots "

1.10 LECO &o3er istri4ution reas "

1.10.1 LECO istri4ution reas and ranc/es $

Chapter 2

2.0 ystem modification for t/e increasin+ load '

2.1 Introduction '

2.2 Load 5orecastin+ '

2.2.1 &rocess of 5orecastin+ '

2.2.2 /e 5actors affectin+ t/e accuracy of 5orecastin+ '

2. &lannin+ *

2..1 O46ectives of &lannin+ *

2." ystem considerations and features *

2.$ tatutory 7e8uirements *

Faculty of Engineering-University of Ruhuna


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2.' &lannin+ Cycle of L! and H! 9et3ork -

2.* Lo3 !olta+e ystem esi+nin+ -

2.*.1 &ossi4le 7easons for !olta+es 4elo3 statutory limits -

2.*.1.1 7emedies -2.- Overloaded istri4ution u4station -

2.-.1 Criteria for 6ud+in+ overloadin+ of ransformers

2.-.1.1 7emedies:&rocedures

2. Hi+/ !olta+e ystem esi+nin+ 10

2..1 Load 5lo3 tudy in LECO 10

2..1.1 #et/odolo+y of Load 5lo3 nalysis 10

2..1.2 efects of t/e e;istin+ Load 5lo3 nalysis in LECO 11

Chapter 3

.0


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.10.2 u++estions for a ne3 pole 9um4erin+ ystem 1

.11 @/at messes up t/e


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$.. 3itc/+ear E8uipment

$...1 Load reak 3itc/es

$...2 Load reak Cutouts "

$... Lo3 volta+e pole mounted H7C 5uses "$." E8uipments used in CC stores&itakotte "

$.".1 Lo3 !olta+e rial undle Conductors "

$.".2 Lo3 !olta+e are Conductor arran+ement $

$.".


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'. ccuracy Classes for Induction ype #eters $0

'.10 i+ital #eters $1

'.11 ariff $1

'.11.1 O46ectives of ariff $2'.11.2 esira4le c/aracteristics of ariff $2

Chapter 7

*.0 ransformers $

*.1 Introduction $

*.2 ap c/an+er $"

*. ur+e rrester $$

*." rop o3n Lift Off (LO) $$

*.$ ir reak 3itc/es $'

*.' 5 (5use isconnection 3itc/es) $'

*.* ransformer Eart/in+ $*

*.- ransformer estin+ $-

*.-.1 #e++er est $-



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*.-.2 7atio est $*.-. Oil estin+ $

Conclusion '0

44reviations '1

7eferences '2

List of Figures

5i+ure1.1LECO po3er distri4ution areas "

5i+ure.1/e interconnection 4et3een t/e se+ments 1"

5i+ure.2 pointin+ into t/e desired location usin+ t3o satellites 1$

5i+ure. ime sync/roni,ation of


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5i+ure.' ata receiverlo++in+ unit 1-

5i+ure.* ntenna 1-

5i+ure".1#imic ia+ram 2-

5i+ure$.1LECO distri4ution system 05i+ure$.2&re stressed concrete pole

5i+ure$. 7C pole

5i+ure$." #anually Operated Load reak 3itc/

5i+ure$.$Construction of a load 4reak cutout "

5i+ure $.' C arran+ement $

5i+ure $.* Dse of ead End Clamp $

5i+ure$.- ypes of


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5i+ure*.$ ir reak 3itc/ $'

5i+ure*.' ransformerEart/ anks $*

5i+ure*.* /e connection of eart/ 3ires $-

5i+ure*.- #e++er O/m #eter $-5i+ure*. Oil ester $

TALES

a4le2.1 llo3a4le !olta+e variances

*

a4le.1 Effective 9um4er of satellite 1$a4le$.1 11k! Conductor ata 1

a4le$.2 k! Conductor ata(9ot used in LECO ) 1

a4le$. 11k! Ca4le ata 1

a4le$." Lo3 !olta+e Conductor ata (C) 2

a4le$.$ ervice Conductor ata 2

a4le$.' Current ratin+s of under+round ca4les 2

a4le$.* Concrete &oles

a4le*.1 vaila4le transformer details in LECO $

a4le*.2 Capacities:5ull load currents:5use ratin+s in H! side $'

a4le*. Capacities:5ull load currents:5use ratin+s in L! side $*

a4le*." details a4out transformer eart/ 4anks $*



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