The presentation is about the Training Done at 220 KV GSS, Sanganer, Jaipur

1. Training at
220 KV Grid Sub Station, Sanganer
Kumar Mayur Sinha
VIIth Sem., B.Tech (Electrical)
0602088(E-2)

2. Power System

3. Rajasthan Rajya Vidyut Prasaran Nigam
Limited (RRVPNL)
 A company under the Companies Act of1956
 Established on 19 July, 2000 by Govt. of
Rajasthan under the provisions of the
Rajasthan Power Sector Reforms Act, 1999 as
the successor company of RSEB.
 An ISO 9001:2000 Certified Company
 Registered Office at Vidyut Bhawan, Jyoti
nagar Jaipur.

4. Duties & Responsibilities of RRVPNL
Transmission of
bulk power from Intra state
generating transmission of
stations to inter- electricity
phase point of
DISCOMS
Planning and co-
ordination
Complying with the relating to intra-
directions of RLDC state
and SLDC for its transmission
operation

5. 220 KV GSS in Jaipur
Place No. of Capacity
Tranformers (MW)
Chomu 6 275.00
Heerapura 5 404.00
Kotputali 5 275.00
Kukas 3 212.50
Phulera 5 193.50
Sanganer 7 312.50
VKIA 3 175.00

6. 220 KV Sanganer
 Located at a distance of 11 KM from
MNIT
 It’s a transmission substation
 Initially was 132 KV GSS
 Later upgraded to 220KV in the year
1991
 Installed transmission capacity of 312.50
MVA (7 tranformers)
 Transmission Loss is about 23% in Raj.

7. Control & Operation of GSS
Works under the directions of RLDC and
SLDC for load dispatch
Load dispatch on the basis of the “Hourly
GSS schedule”
Permission from LDC for line or
Transformer shutdown.
Work in synchronization with DISCOMS
for scheduled maintenance.

9. Incoming Feeders
One feeder of 220kv from
KTPS.
One feeder of 220kv from
400kv GSS Heerapura.
One feeder of 220kv from 220
KV GSS Heerapura
One feeder of 132kv from
220/132kv GSS Heearapura .

10. Incoming
Feeder

11. Ratings of the instrument at the
Incoming Feeder
Instrument Rating
Lightning arrester 198KV
CVT 245KV, 200VA
CT 800-400-200/1A, 5C,
20KA/1Sec.
SF6 Circuit Breaker 245KV, 40KA/3Sec
Wave Trap NA
Line Isolator 800A

12. SF6 CB Ratings
Voltage 245KV
Normal Current 2000A
Lightning impulse
withstand voltage 1050 KV
Short circuit breaking current 40 KA
Short circuit breaking duration 3 sec
Gas Pressure SF6 (20 degree) 7 bar
Air Pressure 20 bar
Line Charging breaking current 125 A

13. Stepping down of voltage to 132KV

14. 220/132 KV, 100 MVA Transformer
Type of Cooling ONAN ONAF OFAF
Rated Power HV(MVA) 50 70 100
LV(MVA) 16.67 23.33 33.33
Rated Voltage HV(KV) 220
IV (KV) 132
LV(KV) 11
Rated Line Current HV(A) 131.37 183.92 262.74
IV(A) 218.95 306.53 437.90
LV(A) 874.97 1225.96 1751.44
No. of Phases 3
Max. Temp. rise Top Oil 40
over an ambient of
Avg. Winding 55
50 degree Celsius
Frequency 50 HZ

15. 220/132 KV, 100 MVA Transformer

16. Ratings of Equipments at 132 KV
switchyard
EQUIPMENT RATING
MAIN BUS-II CVT 220KV//3/110V,200VA
ISO. MAIN BUS-II CVT 800A,245KV
BUS ISOLATER 145 KV,800A
C.B. 1250A,145KV
C.T. 400-200-100/5A,3C
WT NA
It has total of 13 bays with 10 SF6 type of CB & 3 Air
Blast CB’s

17. Equipments at 132 KV switchyard

18. Circuit Breakers
Air Blast CB SF6 CB

19. 132 KV to 33 KV step down

20. Rating of Tranformers at 33 KV and
11KV switchyards
Voltage Power No. of
Rating Rating Transformer
132/33KV 40/50MVA 1
132/33KV 20/25MVA 2
132/11KV 10/12.5MVA 1
33/0.4kv 250KVA 1

21. 33 KV Switchyard

22. Equipments at 33 KV Switchyard
At total of 18 bays with 11 Vacuum CB & 6
MOCB also 1 SF6 CB
Equipment Ratings
33 KV C.T 500-250-125/1A, 2C
33 KV Isolater. Bus 630A
33 KV Circuit Breaker 1250A, 36KV
33 KV capacitor Bank 38 KV, 7.2 MVAR
LA 28KV
33 KV PT(ON BUS-I) 33KV/ /3*110V, 100VA

23. 11 KV Switchyard

24. Equipments at 11KV switchyard
Equipments Ratings
11 KV Circuit Breaker 1250A,25KA/1Sec
11 KV C.T 400-200-100/5A,2C
LA 11KV
11 KV PT ON BUS(3PH) 11KV/110 V, 100VA
11 KV Isolator Bus 400A
11 KV switchyard consisted of 6 bays, with all
Vacuum types of CB

25. Outgoing Feeder 132 KV

26. Outgoing Feeder 33KV

27. Outgoing Feeder 11KV

28. Outgoing Feeder
132 KV 33KV 11KV
 Purana Ghat  Durgapura -1  Muhana
 Niwai  Durgapura-2  Tejawala
 Mansarovar-1  Sanganer  Prem nagar
 Mansarovar-2  Sitapura  Industrial
 Balawala  I.O.C
 Watika
 Phagi
 Malpura gate

29. Fault Operation
 Relay trips as fault is detected in the system
 Breaker operates
 Alarm at control room blows up.
 Alarm is manually reset
 Breaker is made off after 5 min
 If the fault persists , Isolator is removed
 Fault if at switchyard is checked
 If no local fault present, then fault feeder is
contacted.
 Supply is resumed after fault removal

30. Maintenance of GSS
DAILY JOBS
Visual checking for any hot spot
Checking of air and gas leakage from the breaker
Checking of air and gas pressure of breaker
Checking of oil level from CT and CVT

31. Maintenance of GSS
MONTHLY JOB
Thermo vision scanning of conductor joints
and attending to the hot spot available
Breaker operation checking from local and
remote
Isolators operation from remote and local.
Measurement of specific gravity and voltage
of 220 V D. C Battery cells.

32. Transformer Maintenance
Permission from SLDC
Switching Load to other
Tranformer
CB connected is operated
Isolators are operated
Earthing is provided to remove
the residual charge due to
induction.

33. Level of Members
committee
Subdivision level AEN, ARO, JEN
Division level XEN, AEN (Concerned)
Assist Account officer
Circle Level SE, XEN Accounts Officer
Vig. / Audit Officer/ XEN(M&P)
Chief Engineer CE, SE, Sr. AO, SE (Comml.)
level Vig/Audit Officer/SE(M&P)
Corporate Level CMD, Director Finance,CE
(Comm.),
CE (O&M) JPr, Incharge Legal
Section

34. Queries??