This document summarizes a 50MW solar thermal power plant submitted by Godawari Green Energy Limited. It includes: 1. An introduction to GGEL and their focus on renewable energy generation. 2. Working principles of the Concentrated Solar Power system including the heat transfer fluid and water cycles. 3. Technical specifications and diagrams of the main equipment - solar field, turbine, generator, transformers, switchyard, and load distribution. 4. Descriptions of the power distribution from the generator to unit auxiliary transformer and station service transformers which supply electricity to motors during plant operation.

1. GGEL
50MW SOLAR THERMAL POWER PLANT
SUMITTED TO: SUBMITTED BY:
Mr. VINAY KUMAR GUPTA BANWARI LAL
Assistant Professor B.Tech (E.E.)
DEPARTMENT OF Electrical Engg. SEMESTER–7th
PRATAP UNIVERSITY JAIPUR. ROLL NO.- EE110006

4. INTRODUCTION
 GODAWARI GREEN ENERGY LIMITED (GGEL) IS
A FLAGSHIP COMPANY OF THE HIRA GROUP IN
THE RENEWABLE ENERGY SECTOR.
 GGEL’S FOCUS AREA IS POWER GENERATION
USING RENEWABLE SOURCES SUCH AS SOLAR
ENERGY, GEOTHERMAL ENERGY, WIND ENERGY
ETC.
 THE COMPANY WAS INCORPORATED AS A 100%
SUBSIDIARY OF THE GODAWARI POWER & ISPAT
LTD IN THE YEAR 2009.

8. WORKING PRINCIPLE OF CSP

10. HTF CYCLE
SUPERHEATER
& REHEATER S
387°C
EVAPORATOR
308°C
ECONOMISER &
REHEATER E
291°C
EXPANSSION
VESSEL
SOLAR FIELD
HTF
PUMP

11. WATER CYCLE
SUPERHEATER
379°C
REHEATER E &
S
HP
TURBINE
LP
TURBINE
BFP
180°C
WATER SOURCE
DM
PLANT
HP HEATER
284°C
ECONOMISER
295°C
STEAM DRUM
&
EVAPORATOR
295°C
CONDENSOR
HOT WELL
DEAERATOR
REHEATER E
& S

12. BLOCK DIAGRAM OF TURBINE-ALTERNATOR
CONNECTION
LP
TURBINE
LP STEAM
DIRECT CONNECTION
INDIRECT
CONNECTION HP STEAM
ALTERNA
TOR
GEAR BOX
HP
TURBINE

13. ABBREVIATIONS
 UAT – UNIT AUXILIARY TRANSFORMER
 SST – STATION SERVICE TRANSFORMER
 BFP – BOILER FEED PUMP
 CCWP – CLOSE COOLING WATER PUMP
 ACWP – AUXILIARY COOLING WATER PUMP
 HTF – HEAT TRANSFER FLUID
 JOP – JACKING OIL PUMP
 GSC – GLAND STEAM CONDENSOR

14. ABBREVIATIONS
 MOP – MAIN OIL PUMP
 AOP – AUXILIARY OIL PUMP
 EOP – EMERGENCY OIL PUMP
 CEP – CONDENSATE EXTRACTING PUMP
 CT FAN – COOLING TOWER FAN
 CWP – CIRCULATING WATER PUMP
 MOG – MAGNETIC OIL GAUGE
 PRV – PRESSURE RELEAVE VALVE

15. POWER DISTRIBUTION BLOCK DIAGRAM
GEN.
70.5 MVA
10.5 KV
GSU T/F
75 MVA
10.5/132 KV
UAT
7.5 MVA
10.5/6.6 KV
SST-1
2.5 MVA
10.5/0.440 KV
SST-2
2.5 MVA
10.5/0.440 KV
SST-3
1.5 MVA
6.6/0.440 KV
SST-4
750 KVA
6.6/0.440 KV
HV MOTORS
1.BFP-1/2/3
2.HTF PUMP-1/2/3/4
3.CWP-1/2/3
LV MOTORS
1. CEP 8. VACUUM PUMP 15. SEAL WATER PUMP
2. MOP 9. OIL MIST FAN 16. HTF SEAL PUMP
3. AOP 10. CONTROL OIL PUMP 17. LUBE OIL PURIFIER
4. EOP 11. AIR COMPRESSOR 18. CONTROL
5. JOP 12. CT FAN OFFLINE PUMP
6. CCWP 13. TURBINE GEAR
7. ACWP 14. GSC
GEN. BREAKER
UAT
BREAKER
BREAKER
BREAKER
HTF HEATER PUMP RW SUPPLY PUMP
R
Y
B
SWITCHIN
G YARD

16. POWER DISTRIBUTION TO THE TRANSFORMERS
UAT
GEN.
SST-1 SST-2
POWER
T/F
1. TURBINE IS NOT RUNNING.(GRID IS AVAILABLE)
2. TURBINE IS RUNNING.(GRID IS NOT AVAILABLE)
SG
SGPOWER
T/F
UAT SST-1 SST-2
GEN.
132KV
132KV
10.5KV
10.5KV

17. GENERATOR
 IT IS A DEVICE THAT CONVERTS MECHANICAL
ENERGY INTO ELECTRICAL ENERGY.
 IT WORKS ON THE PRINCIPLE OF EMI(ELECTRO-
MAGNETIC INDUCTION) OF FARADAY.
 IT IS CONNECTED TO LP AND HP TURBINE DIRECT
AND INDIRECT RESPECTIVELY.
 HERE THE ELECTRICITY IS GENERATED AT 10.5KV.

18. RATED
POWER-
70.590MVA
RATED
VOLTAGE –
10500V+/- 10% V
RATED
CURRENT –
3881 A
ACTIVE POWER
-50 MW
SPEED – 3000rpm

19. GENERATOR SPECIFICATIONS
MACHINE CODE SGEN5-100A-2P
RATED VOLTAGE 10500V +/- 10%
RATED POWER 70590 KVA
PHASES 3
CONNECTION STAR
FREQUENCY 50 Hz
P.F.(COSF) 0.708
RATED CURRENT 3881 A
EXCITATION SELF
RATED SPEED 3000 rpm
INSULATION
CLASS
F
AMBIENT TEMP. 50C
PHASE SEQUENCE U1 V1 W1
IP 54
IM 7216
ACTIVE POWER 50 MW
TOTAL WEIGHT 116.800 Kg
COOLING TYPE AIR

20. TRANSFORMER – 75 MVA (10.5KV/132KV)
 IT IS AN ELECTRICAL
DEVICE THAT TRANSFER
ELECTRICAL ENERGY
FROM ONE SIDE TO
ANOTHERSIDE WITHOUT
CHANGE IN ITS
FREQUENCY.
 TRANSFORMER IS USED
TO CONVERT 10.5KV INTO
132KV FOR
TRANSMISSION TO
GSS(GRID SUB-STATION).

21. MARSHAILING
BOX
10.5 KV
INPUT
132KV
OUTPUT
GSU TRANSFORMER
COOLING
FAN

22. REFERENCE
STANDARD
IS:2026
CORE & WDG MASS 38900Kg
TANK & FITTING
MASS
14900Kg
OIL MASS 17200Kg
TOTAL T/F MASS 71000Kg
TRANSPORT MASS 66000Kg
TOTAL OIL
QUANTITY
20200 Liters
OVERALL
DIMENSIONS
6.754.205.90 m
TRANSPORT
DIMENSIONS
5.302.503.75 m
GSU TRANSFORMER PHYSICAL
SPECIFICATIONS
TEMP. RISE OF
OIL
60C
TEMP. RISE OF
WDG
65C
AMBIENT TEMP. 50C
TYPE OF
COOLING
ONAN/ONAF
TANK PLATE THICKNESS
COVER 12 mm
BOTTOM 16 mm
SIDE 8 mm

23. SWITCHING YARD
 THE APPLICATION OF SWITCHYARDS IS TO
DELIVER THE GENERATED POWER FROM
POWER PLANT AT DESIRED VOLTAGE LEVEL TO
THE NEAREST GRID OR TRANSMISSION LINE.
 THE SWITCHYARD IS PROVIDED WITH NECESSARY
ISOLATORS, CIRCUIT BREAKERS, CURRENT
TRANSFORMER, POTENTIAL TRANSFORMERS,
SURGE ARRESTORS, WAVE TRAPS, PROTECTIVE
RELAYS, PLCC ETC.
 SWITCHYARD IS CONTROLLED FROM DCS WHICH
WILL BE LOCATED IN POWER BLOCK CONTROL
ROOM.

25. CONNECTION OF T/F’S

26. UAT CONNECTION
UAT
7.5 MVA
10.5KV/6.6KV
SST-3
1.5 MVA
6.6KV/0.440KV
SST-4
750KVA
6.6KV/0.440KV
BFP(3)
875 KW
6300V
96A
3071rpm
HTFP(4)
900KW
6300V
101A
2970rpm
CWP(3)
510KW
6300V
58A
986rpm
RAW WATER
PUMP SUPPLY
HTF HEATER
SPARE
MOTOR
FEEDER

27. LOAD DISTRIBUTION FROM UAT
 THE HV MOTORS(HTF, BFP & CWP) ARE CONNECTED
TO UAT TRANSFORMER.
 THE TOTAL POWER DISTRIBUTED TO HT MOTORS IN
BOTH CASES ARE:
 IN NORMAL CONDITION – 5470 KW
 TOTAL LOAD CONNECTED – 7755 KW

28. SST-1 CONNECTION TO LOADS
SST-1
2.5 MVA
10.5/0.440 KV
CONDENSAT
E PUMP 1&3
220 KW
415 V
193 A
1488 rpm
JOP 1&2
30 KW
415 V
27.1 A
1455 rpm
CT FAN 1&3
150 KW
415 V
132 A
1482rpm
VACUUM
PUMP-1
55 KW
415 V
96 A
CCWP 1&2
90 KW
415 V
78 A
2955 rpm
AOP 2
45 KW
415 V
78.4 A
1470 rpm
ACWP-1
55 KW
415 V
95.6 A
1475 rpm
AUXILIARY
LOAD
150 KW
AIR
COMPRESSOR
-2
37 KW
400 V
2965 rpm
COP
16 KW
415 V
TOTAL LOAD
= 848 KW

29. SST-2 CONNECTION TO LOADS
SST-2
2.5 MVA
10.5/0.440 KV
CT FAN-2
75 KW
415 V
132 A
1482 rpm
MOP
45 KW
415 V
78.4 A
1470 rpm
AIR
COMPRESSOR
-1
37 KW
400 V
2965 rpm
VACUUM
PUMP-2
55 KW
415 V
96 A
CONDENSAT
E PUMP-2
110 KW
415 V
193 A
1488 rpm
ACWP-2
55 KW
415 V
95.6 A
1475 rpm
COP
16 KW
AUXILIARY
LOAD
88.6 KW
TOTAL LOAD
= 481.6 KW

30. SST-4 CONNECTED LOAD
SST-4
750KVA
6.6/0.440KV
RAW WATER
MAKEUP
PUMP (2)
18.5KW
415V
31.5A
2929rpm
WASTE
WATER
PUMP (2)
1.5KW
415V
3.4A
1410rpm
TOTAL
LOAD = 40
KW

31. LOAD DISTRIBUTION FROM SST
 THE LV MOTORS(CEP, CCWP, ACWP & VACUUM PUMP etc.) ARE
CONNECTED TO SST TRANSFORMERS.
 THERE ARE 4 SST TRANSFORMER - SST-1, SST-2, SST-3, SST-4.
 THE TOTAL LOAD CONNECTED TO EACH OF THE SST IN BOTH
CASE ARE:
 SST-1
 IN NORMAL CONDITION – 545.6 KW
 THE TOTAL LOAD CONNECTED – 848KW

32. LOAD DISTRIBUTION FROM SST
 SST-2
 IN NORMAL LOAD CONDITION – 364.2 KW
 TOTAL LOAD CONNECTED – 481.6 KW
 SST-4
 IN NORMAL LOAD CONDITION – 20 KW
 TOTAL LOAD CONNECTED – 40 KW
 SST-3 - ISOLATE

33. TOTAL LOAD DISTRIBUTION FROM ALL
TRANSFORMERS
 TOTAL LOAD AT HV MOTORS –
 IN NORMAL CONDITION – 5470 KW
 TOTAL LOAD CONNECTED – 7755 KW
 TOTAL LOAD AT LV MOTORS –
 IN NORMAL CONDITION – 909.8 KW
 TOTAL LOAD CONNECTED – 1329.6 KW
 TOTAL LOAD –
 IN NORMAL CONDITION – 6399.8 KW
 TOTAL LOAD CONNECTED – 9124.6 KW
 LOAD DURING NON-GENERATING HOURS – 205.5 KW

35. PPA – POWER PURCHASE AGREEMENT