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Study of a Cogeneration Plant in Sugar Mill by using Bagasse as a Fuel

1C.Dinakaran, Assistant Professor, Dept. of EEE, Sri Venkateswara College of Engg. & Tech., Chittoor

2S.Purushotham, Assistant Engineer, S.N.J Sugars and Products Limited, Nelavoy Village, Chittoor

3S.M.Harikrishna, Trainee Engineer, S.N.J Sugars and Products Limited, Nelavoy Village, Chittoor

[email protected], [email protected], [email protected]

Abstract — Bagasse cogeneration describes the use of fibrous sugarcane waste, bagasse to cogenerate heat and electricity at high efficiency in sugar mills. Proposed work is a case study on sugarcane industry and economics is worked out for advanced cogeneration power system. In generally, different kinds of co-generation plants are available based on products in industry and bagasse is derived from several types of the cogeneration plant. By replacing low-efficiency mill turbines with hydraulic drives and DC motors, cogeneration power increases in sugar mill to operate at high efficiency (65-70%). This replacement can aid increase of power to a grid, resulting in additional revenue for sugar plant. The research evaluates the technical feasibility and economic viability of reconfiguring the sugar industries towards cogeneration and also quantifies the emissions from Bagasse cogeneration. The total electric power that can be produced and fed to the national grid, the economic issues and the issues of emissions.

Key Words — Bagasse, Boiler, Feed Water Heater, Condenser, Turbine, Chimney, ID Fan, S.A Fan, F.D Fan.

I. INTRODUCTION

 Fig.1 shows the line diagram of steam/thermal power plant [1]. The fuel for a thermal power plant is coal/Bagasse. The coal is pulverized in coal pulverization plant for required sizes to feed in the boiler unit of steam/thermal power plant [2]. The water in boiler gets heated once the coal/bagasse is fired in the furnace. Gradually the water gets converted into steam after heating it up to 4800C. The steam flows through the superheater such that the moisture content in the steam gets evaporated and turn into super saturated steam [3]. The hot flue gas from the boiler is fed to superheater which increases the temperature of the superheater and removes the moisture content. The flue gas flowing through super heater flows through economizer and air pre-heater. The main function of the economizer is that it will increase the temperature of the feed water by utilizing the heat from the hot flue gases [4].

  The feed water is again sent to the boiler for conversion of steam [5]. The air pre-heater increases the temperature of the air supplied for coal burning by deriving heat from flue gases [6]. By preheating the air there will be an increase in thermal efficiency and increase in steam capacity per square meter of boiler surface. The super saturated steam from superheater is fed to the impulse reaction turbine by means of the main valve [7]. The valve placed in between superheater and the turbine is for limiting the excess flow level of steam to the turbine. The turbine converts steam energy into mechanical energy [8].

  The turbine is coupled with the Turbo Alternator with the help of couplings. The Turbo Alternator converts mechanical energy into electrical energy [9].  The generated electrical energy is stepped up by using power transformer and feed to bus bar with various protection systems.

Fig. 1 Line Diagram of Steam Power Plant

  The 132KV power generated is sent to the nearest substation. The exhaust steam from steam turbine is again converted into water in the condenser and it is sent to the cooling tower with the water from the river/pond, where the water is cooled and sent to circulating water pump [10]. Again the water is sent through condensate extraction pump to LP water heater and then to HP feedwater heater. Then the water is sent to economizer and from there it is circulated to boiler [11]. This process repeats simultaneously. The ash in the furnace is sent to ash handling plant where it is mixed in water in order to stop the spreading of the ash in the air and it is sent to ash storage plant. The electrostatic precipitator collects the dust from the furnace and sends the exhaust gases through a chimney.

II. COGENERATION PLANT ACCESSORIES EQUIPMENT

A. Boiler

Fig. 2 Babcock and Wilcox Boiler

   The Babcock and Wilcox boiler is a water tube, internally fired and natural water circulation boiler. The steam and water drum which is placed about 8Meter in length and 2Meter in diameter. It is inclined at an angle of 10° to 15° from the normal position to promote water circulation. Fig.2 shows the Babcock and Wilcox boiler, Coal is fed to the grate through the fire door and is burnt. The hot flue gases rise upward and pass across the left side portion of the water tubes. The baffles are used to deflect the hot gases in the zigzag manner and for an upward and downward direction of the flue gases movement over the water tubes along with superheater. The part of the water tubes which is just above the furnace is heated to a higher temperature so that the water density is decreased. Due to a decrease in density, the water rises into the drum through the uptake header. In this position, the water and steam are separated in the drum. In fact, the steam is having lighter weight compared to water. So it is collected in the upper parts of the drum. The circulation of water is obtained by convective currents and it is known as natural circulation. The steam is taken from the drum through a tube to the superheater for superheating the steam. A damper is fitted to regulate the flue gas outlet and the boiler is fitted with necessary mountings.

B. Super Heater

The steam produced in the boiler is wet and is passed through a superheater where it is dried and superheated (i.e.., the steam temperature increased above that of boiling point of water) by the flue gases on their way to the chimney. Superheating provides two principal benefits. Firstly, the overall efficiency is increased and secondly, too much condensation in the last stages of a turbine (which would cause blade corrosion) is avoided. The superheated steam from the superheater is fed to steam turbine through the main valve. The Superheater is used to increase the temperature of saturated steam without raising its pressure and it is placed on the hot flue gases path in the furnace.

C. Impulse – Reaction Turbine

Fig. 3 Impulse – Reaction Turbine

Fig.3 shows the impulse -reaction turbine. This type of turbine is a combination of impulse and reaction turbine. The total pressure drop of the steam from the boiler to condense pressure is divided into a number of stages as done in pressure compounding and velocity obtained in each stage is also compounded. For a given pressure drop, this type of turbines is designed in compact sizes. The dry and superheated steam from the superheater is fed to the steam turbine through the main valve. The heat energy of steam when passing over the blades of a turbine is converted into mechanical energy. After giving heat energy to the turbine, the steam is exhausted to the condenser which condenses the exhausted steam by means of cold water circulation.

D. Alternator

Fig. 4 Turbo Alternator

Fig.4 shows the turbo alternator. The steam turbine is coupled to an alternator. The alternator converts mechanical energy of turbine into electrical energy. The electrical output from the alternator is delivered to the bus bars through transformer, circuit breakers and isolators.

E. Exciter

Fig. 5 Exciter

Exciters are nothing but the D.C. generators. Its main function is to supply DC power to the field system / rotor. These are mounted on the same shaft of the Alternator. The capacity of the exciter is about 0.5% to 3% of the alternator capacity. The exciter was a small DC generator coupled to the same shaft as the rotor. Therefore, when the rotor rotates this exciter produces the power for the electromagnet. Control of the exciter output is done by varying the field current of the exciter. This output from the exciter then controls the magnetic field of the rotor to produce a constant voltage output by the generator. This DC current feeds to the rotor through slip rings as shown in Fig.5.

F. Power Transformer

Fig. 6 Power Transformer

A transformer is a static device which transfers the electrical power or energy from one alternating current circuit to another with the desired change in voltage or current and without any change in the frequency. A power transformer is used in a substation to step-up (or) step-down the voltage. Fig.6 shows the substation transformer which is installed upon the length of rails fixed a concrete slabs having foundation 1 to 1.5 m deep.

G. Lightning Arrester

Fig. 7 Lightning Arrester

The Fig.7 shows the substation lightning arrestors. Lightning arrestors are the instrument that is used in the incoming feeders so that to prevent the high voltage entering the main station. This high voltage is very dangerous to the instruments used in the substation. Even the instruments are very costly, so to prevent any damage lightening arrestors are used. The lightening arrestors do not let the lightning fall on the station. If some lightening occurs the arrestors pull the lightning and ground it to the earth. In any substation/generating station the main important is of protection which is firstly done by these lightning arrestors. The lightening arrestors are grounded to the earth so that it can pull the lightning to the ground. The lightening arrestor works with an angle of 30° to 45° making a cone.

H. Potential Transformer

Fig. 8 Potential Transformer

The Fig.8 shows the substation potential transformer. There are two potential transformers used in the bus connected both sides of the bus. The potential transformer uses a bus isolator to protect itself. The main use of this transformer is to measure the voltage through the bus. This is done so as to get the detail information of the voltage passing through the bus to the instrument. There are two main functions in it

a. Measurement

b. Protection

I. Current Transformer

Fig. 9 Current Transformer

  Fig.9 shows current transformer. Current transformers are basically used to take the readings of the currents entering the substation. This transformer steps down the current from 800Amps to 1Amp. The current transformer works on the principle of variable flux.  This is done because we have no instrument for measuring of such a large current. The main use of this transformer is

a. Distance Protection

b. Backup Protection

c. Measurement

J. Isolator

Fig. 10 Isolator

Fig.10 shows isolator, the use of this isolator is to protect the transformer and the other instrument in the line. The isolator isolates the extra voltage to the ground and thus any extra voltage cannot enter the line. Thus an isolator is used after the bus also for protection.

K. Bus bar

Fig. 11 Bus Bar

 A bus-bar term is used for a bar (or) conductor carrying an electric current to which many connections may be made as shown in Fig.11.

L. Relay

Fig. 12 Relay Panel

Fig.12 shows a relay panel. A relay is a device which detects the fault and initiates information to the circuit breaker to isolate the detective element from the rest of the system.

M. SF6 Circuit Breaker

Fig.13 shows a sulphur hexafluoride circuit breaker. The sulphur hexafluoride gas (SF6) is an electronegative gas and has a strong tendency to absorb free electrons. The contacts of the breaker are opened in a high-pressure flow of sulphur hexafluoride (SF6) gas and an arc are struck between them. The gas captures the conducting free electrons in the arc to form relatively immobile negative ions. This loss of conducting electrons in the arc quickly builds up enough insulation strength to extinguish the arc. The sulphur hexafluoride (SF6) circuit breakers have been found to be very effective for high power and high voltage service.

Fig. 13 Sulphur Hexafluoride Circuit Breaker

III. PROTECTIVE SYSTEMS

A. Alternator Protection

  The protections that are used in a thermal power plant for a generator or alternator are as follows,

  Differential protection

  Reverse power protection

  Over frequency protection

  Stand by earth fault

  Loss of excitation protection without u/v

  Loss of excitation protection with u/v

  MET protection PT fuse fail generator negative PH sequence-1

  Generator negative PH sequence-2

  Under Frequency protection-1

  Under Frequency protection-2

  Voltage restraint o/c relay

  Generator over voltage protection-1

  Generator over voltage protection-2

  Generator under voltage protection

  Overload protection

  AVR PT fuses fail

  Emergency trip

  GRP self-test fail

  GRP power supply fail

  Over fuse protection

  Class-A trip

  Direction sensitive E/F trip

  MIT overload relay

B. 132KV Switch Yard Protections

  VT fuse fails relay

  Standby earth fault

  Over current relay R

  Over current relay y

  Over current relay B

  Neutral displacement relay

  Overvoltage relay

  Under voltage relay

  Buchholz trip relay

  Winding temperature trip relay

  Oil temperature trip relay

  Oil surge trip relay

  PRD alarm

  MOG alarm

  Buchholz alarm relay

  Winding temperature alarm

  Oil temperature alarm

  LV master trip relay

  HV master trip relay

  Trip relay coils supervision relay

  11KV Tie CB coil supervision relay

  132KV CB trip coil-1 supervision relay

  132KV CB trip coil-2

  PRD trip relay

IV. STANDARDS TO GENERATE POWER IN SUGAR MILL BY USING BAGASSE/COAL

  As per the industrial records, some of the standard values are mentioned below,

  If one tonne of bagasse is burnt 2.2 tonne of steam is produced.

  If one tonne of coal is burnt 4 tonne of steam is produced as per the calorific value of coal.

  To generate 1MW of power 4 tonne of steam is required.

  To generate 20MW of power 80 tonne of steam is required.

  The boiler used for steam production is Thermal Babcock and Wilcox Boiler with an operating capacity of 80 TPH, the pressure of 67 ATA, the temperature of 487±50C.

  If one tonne of a cane is crushed 300Kg of bagasse is produced.

  In a day to generate 20MW of power 50 tonne of de-mineralized water is used.

  To generate 1MW of power 6.55 tonne of water is required.

  To generate 20MW of power 131 tonne of water is required.

  The moisture content in the bagasse must be from 490 to 550C.

V. VARIOUS PARAMETERS OF STEAM TURBINE

S.NO TURBINE PARAMETERS UNITS 6:00 AM 7:00AM

1. TURBINE LOAD MW 11.1 11.2

2. TURBINE SPEED RPM 7122 7167

3. INLET STEAM PRESSURE KG/CM2 63 62

4. INLET STEAM TEMPERATURE °C 477 476

5. INLET STEAM FLOW TPH 71 72

6. AFTER FIRST STAGE STEAM PRESSURE KG/CM2 32 33

7. HP EXTRACTION STEAM PRESSURE KG/CM2 7.0 6.9

8. HP EXTRACTION STEAM TEMPERATURE °C 235 230

9. HP EXTRACTION STEAM FLOW TPH 8.4 8.6

10. LP EXTRACTION STEAM PRESSURE KG/CM2 1.02 1.01

11. LP EXTRACTION STEAM TEMPERATURE °C 125 124

12. LP EXTRACTION STEAM FLOW TPH 60 63

13. AUXILIARY STEAM PRESSURE KG/CM2 9.9 9.9

14. AUXILIARY STEAM TEMPERATURE °C 431 432

15. SEALING STEAM PRESSURE KG/CM2 0.05 0.05

16. SEALING STEAM TEMPERATURE °C 245 245

17. EXHAUST STEAM PRESSURE KG/CM2 -0.93 -0.93

18. EXHAUST STEAM TEMPERATURE °C 43 43

19. CONDENSATE FLOW TPH 4 6

20. HP VALVE DEMAND % 69 70

21. HP VALVE POSITION MM 27 27

22. LP VALVE DEMAND % 30 29

23. LP VALVE POSITION MM 7/5 7/5

24. CONTROL OIL PRESSURE KG/CM2 9.5 9.6

25. LUBE OIL PRESSURE KG/CM2 1.9 1.9

26. DIFFERENTIAL PRESSURE ACROSS FILTERS KG/CM2 0.45 0.45

27. OIL COOLER OIL INLET TEMPERATURE °C 58 58

28. OIL COOLER OIL OUTLET TEMPERATURE °C 42 42

29. CONDENSER CW INLET PRESSURE KG/CM2 0.80 0.80

30. CONDENSER CW OUTLET PRESSURE KG/CM2 0.65 0.65

31. CONDENSER COOLING INLET TEMPERATURE °C 32 32

32. CONDENSER COOLING OUTLET TEMPERATURE °C 35 35

33. OIL COOLER COOLING WATER INLET TEMPERATURE °C 32 32

34. OIL COOLER WATER OUTLET TEMPERATURE °C 35 35

35. MAIN OIL TANK LEVEL MM N N

36. OIL OVERHEAD TANK OVERFLOW YES/NO Y Y

37. LUBE OIL SUPPLY PRESSURE AT TURBINE THRUST BEARING KG/CM2 0.45 0.45

38. LUBE OIL RETURN TEMPERATURE AT TURBINE THRUST BEARING °C 54 54

39. LUBE OIL RETURN TEMPERATURE AT TURBINE FRONT BEARING °C 55 55

40. LUBE OIL SUPPLY PRESSURE AT TURBINE FRONT  BEARING KG/CM2 0.95 0.95

41. LUBE OIL SUPPLY PRESS. AT TURBINE REAR BEARING KG/CM2 0.69 0.69

42. LUBE OIL SUPPLY PRESSURE AT GEAR BOX KG/CM2 1.18 1.18

43. LUBE OIL SUPPLY PRESSURE AT GENERATOR FRONT BEARING KG/CM2 0.69 0.69

44. LUBE OIL SUPPLY PRESSURE AT GENERATOR REAR BEARING KG/CM2 0.63 0.63

45. LUBE OIL RETURN TEMPERATURE AT TURBINE REAR BEARING °C 60 60

46. LUBE OIL RETURN TEMPERATURE AT GEN GEAR BOX °C 51 51

47. LUBE OIL RETURN TEMPERATURE AT GENERATOR FRONT BEARING °C 50 50

48. LUBE OIL RETURN TEMPERATURE AT GENERATOR REAR BEARING °C 46 46

49. TURBINE THRUST BEARING TEMPERATURE (ACTIVE) (A) °C 54 54

50. TURBINE THRUST BEARING TEMPERATURE (ACTIVE) (D) °C 54 54

51. TURBINE FRONT BEARING TEMPERATURE (F) °C 87 87

52. TURBINE REAR BEARING TEMPERATURE (I) °C 69 69

53. GEAR PINION FRONT BEARING TEMPERATURE (K) °C 80 80

54. GEAR PINION REAR BEARING TEMPERATURE (J) °C 87 87

55. GEAR PINION WHEEL FRONT BEARING TEMPERATURE (M) °C 67 67

56. GEAR PINION WHEEL REAR BEARING TEMPERATURE (W) °C 63 64

57. GENERATOR FRONT BEARING TEMPERATURE (P) °C 60 60

58. GENERATOR REAR BEARING TEMPERATURE (Q) °C 57 57

59. HOT WELL TEMPERATURE °C 43 43

60. HOT WELL LEVEL % 33 32

61. CONDENSER VACUUM KG/CM2 -0.93 -0.93

62. CEP SUCTION PRESSURE KG/CM2 -0.82 -0.82

63. CEP DISCHARGE PRESSURE KG/CM2 7.6 7.6

64. CONDENSATE TEMPERATURE BEFORE EJECTOR °C 42 42

65. CONDENSATE TEMPERATURE AFTER EJECTOR °C 58 58

66. CONDENSATE BEFORE GLAND STEAM CONDENSER °C 55 55

67. CONDENSATE TEMPERATURE AFTER GLAND STEAM CONDENSER °C - -

68. GENERATOR AIR COOLER WATER INLET TEMPERATURE °C 32 32

69. GENERATOR AIR COOLER WATER OUTLET TEMPERATURE °C 34 34

70. AXIAL DISPLACEMENT MM 0.22/0.26 0.25/0.26

71. TURBINE FRONT SHAFT VIBRATION MICRONS 65/75 66/73

72. TURBINE REAR SHAFT VIBRATION MICRONS 27/35 28/35

73. GEAR PINION SHAFT VIBRATION (HSS) MICRONS 22/33 28/31

74. GEAR WHEEL SHAFT VIBRATION (LSS) MICRONS 18/19 16/18

75. GENERATOR FRONT SHAFT VIBRATION MICRONS 33/25 37/26

76. GENERATOR REAR SHAFT VIBRATION MICRONS 24/33 21/35

77. HP SECONDARY OIL PRESSURE KG/CM2 3.0 3.0

78. LP SECONDARY OIL PRESSURE KG/CM2 2.6 2.6

VI. CONCLUSION

 Bagasse otherwise a refuse, if used as cogeneration fuel  is proved to have been technically feasible, economically viable for the competitive industrial environment of sugar industries, environmentally friendly because of greenhouse neutral emissions and acceptable regarding social matters. By using this type of plants we save natural resources like coal, water because the byproduct of sugar cane i.e., bagasse is used as raw material for combustion. By erecting the plant as per the design it results in the reduction of atmospheric pollution and increases the power generation and the efficiency of the plant increases. By these designs, the step by step process of power generation will be in a progressive level such that interruption in power generation will not happen

and fault identification and rectification will be easy for any working individual.

    

References

[1] M.M.Salama, M.M.Elgazar, S.M.Abdelmaksoud, H.A.Henry, “Solving Short Term Hydrothermal Generation Scheduling by Artificial Bee Colony Algorithm”, International Electrical Engineering Journal (IEEJ), Vol. 6 (2015), No. 7, PP. 1973-1987.

[2] M.Premalatha, S.Shanmuga Priya, V.Sivaramakrishna, “Efficient Cogeneration scheme for sugar industry”, Journal of Scientific & Industrial Research, Vol. 67, March 2008, PP. 239-242.

[3] G.V.Pradeep Varma, T.Srinivas, “Design and analysis of a cogeneration plant using heat recovery of a cement factory”, Case Studies in Thermal Engineering (Elsevier), Vol. 5 (2015), PP. 24-31.

[4] Francesco Fantozzi, Sandro Diaconi Ferico, Umberto Desideri, “Study of a cogeneration plant for agro-food industry”, Applied Thermal Engineering, Vol. 20 (2000), PP. 993-1017.

[5] Domenico Panno, Antonio Messineo, Antonella Dispenza, “Cogeneration Plant in a pasta factory: Energy saving and environmental benefit”, Energy (Science Direct, Elsevier), Vol. 32 (2007), PP. 746-754.

[6] G.Prasad, E.Swidenbank, B.W.Hong, “A Novel Performance Monitoring Strategy for Economical Thermal Power Plant Operation”, IEEE Transactions on Energy Conversion, Vol. 14, No. 3, September 1999, PP. 802-809.

[7] S.P.Nangare, R.S.Kulkarni, “Theoretical Analysis of Energy Utilization Measures through Energy Audit in sugar industry Power Plant”, International Journal of Advanced Engineering Research and Studies, Vol. 1, Issue 3, April – June 2012, PP. 168-171.

[8] Saori Shibatani, Motohiro Nakanishi, Nobumi Mizuno, Fumihito Mishima, Yoko Akiyama, “Study on Magnetic Separation Device for Scale Removal from feed-water in Thermal Power Plant”, IEEE Transactions on applied superconductivity, Vol. 26, No. 4, June 2016.

[9] Samir Ansari, Vikash Kumar, Arindam Ghosal, “A Review on Power Generation in Thermal Power Plant for Maximum Efficiency”, International Journal of Advanced Mechanical Engineering, Vol. 4, No. 1 (2014), PP. 1-8.

[10] C.Dinakaran, “Implementation of Shunt and Series FACTS Devices for Overhead Transmission Lines”, International Electrical Engineering Journal (IEEJ), Vol. 6 (2015), No. 8, PP. 2009-2017.

[11] M.S.Krishnarayalu, “Unit Commitment with economic load dispatch”, International Electrical Engineering Journal (IEEJ), Vol. 6 (2015),  No. 5, PP. 1913-1916.

APPENDIX

TYPES OF EQUIPMENT USED IN COGENERATION PLANT

AVR PANEL:

SL.NO : S30381

MAKE : BHEL

NOMINAL OUTPUT : 7.12 A, 78.4 V

CEILING OUTPUT : 11.27 A, 150 V

LOAD : EXCITER HELP

COOLING : AN

MAXIMUM AMBIENT : 50°C

AUXILIARY DC SUPPLY : 1100

AUXILIARY AC SUPPLY : 415 V, 3 PHASE, 50HZ

NEUTRAL GROUNDING RESISTORS:

MAKE : NATIONAL SWITCH GEARS, CHENNAI-98

SYSTEM VOLTAGE : 125 KV, AC, 50HZ

FAULT CURRENT : 100 A

DURATION : 30 SECOND

TOTAL RESISTANCE : 63.5 OHMS

ELEMENT MAT./TYPE : COIL WOUND / PUNCHED

AMBIENT TEMPERATURE : 50°C

TEMPERATURE RISE : 25°C

SL.NO./YEAR OF MFG. : NGR/T/38/2000

REFERENCE DRG. : NGP-3-1868

ESP ELECTRONIC CONTROLLER-1:

MODEL : ADOR CORONA

MAKE : ADOR POWERTRON LTD., PUNE

SL.NO. : 0796-01-03-2001

RATED INPUT VOLTAGE : 415 V, AC, 50 HZ

RATED INPUT CURRENT : 120 A

RATED OUTPUT VOLTAGE : 95 KV (PEAK) DC

RATED OUTPUT CURRENT : 500 MA DC

ESP ELECTRONIC CONTROLLER-2:

MODEL : ADOR CORONA

MAKE : ADOR POWERTRON LTD., PUNE

SL.NO. : 0795-01-03-2001

RATED INPUT VOLTAGE : 415 V, AC, 50 HZ

RATED INPUT CURRENT : 120 A

RATED OUTPUT VOLTAGE : 95 KV (PEAK) DC

RATED OUTPUT CURRENT : 500 MA DC

FLOAT CUM BOOST BATTERY CHARGER-1:

TYPE : 110TP150

INPUT : 415 V, AC,50 HZ

OUTPUT : 110 V,150 A, AC

SL.NO. : 2037-1195

MANUFACTURING : JUNE 2001

FLOAT CUM BOOST BATTERY CHARGER-2:

TYPE : 110TP150

INPUT : 415 V, AC,50 HZ

OUTPUT : 110 V,150 A, AC

SL.NO. : 2038-1195

MANUFACTURING : JUNE 2001

INCOMER FROM STG FEEDER: (VCB)

VOLTAGE : 11 KV

FREQUENCY : 50 HZ

CIRCUIT CURRENT : 2000 A

BUS BAR CURRENT : 2000 A

TYPE : VM12

SL.NO. : BP9055146

MAKE : BHEL, BHOPAL

SPEC. : IS3427 / IEC 298

TO GENERATOR TRANSFORMER FEEDER: (VCB)

VOLTAGE : 11 KV

FREQUENCY : 50 HZ

CIRCUIT CURRENT : 2000 A

BUS BAR CURRENT : 2000 A

TYPE : VM12

SL.NO. : BP9055145

MAKE : BHEL, BHOPAL

SPEC. : IS3427 / IEC 298

TURBO GENERATOR:

MAKE : BHEL, HYDERABAD

DRIVE : ST

KVA : 25500

KW : 20400

POWER FACTOR LAG : 0.8

FREQUENCY : 50

RPM : 1500

PHASE : 3 AC

CONNECTION : STAR

STATOR VOLTS : 11000

STATOR AMPS : 1338

ROTOR VOLTS : 93

ROTOR AMPS : 838

AMBIENT AIR : 39°C

COOLING : CACW

DUTY : CONT.

ALTITUDE : <1000M

TOTAL WEIGHT : -

OVER SPEED : 10%

GAS PRESSURE : NA

WINDING INSULATION : CLASS F

STANDARD : IEC - 34, IS : 4722

TYPE : TA11 1240 12P - 15

PROTECTION : IP- 54

SL.NO. : 1408

YEAR : 2001

BRUSHLESS EXCITER:

MAKE : BHEL

TYPE : EAR 80/9 -15/16 - 217

INSULATION CLASS : F

SL.NO. : 10558

YEAR : 2001

STANDARD NO. : IS : 4722

KW : 94

CONT. VOLTS : 102

CONT. AMPS : 922

RPM : 1500

EXCITATION W : 544

EXCITATION V : 77.41

EXCITATION A : 7.03

PERMANENT MAGNET GENERATOR:

MAKE : BHEL

TYPE : EAP11/ 16-15/6

KVA : 1.5

VOLTAGE : 220

AMPS : 3.94

FREQUENCY : 75 HZ, 3 PHASE

RPM : 1500

UPS PANEL-1:

CAPACITY : 15 KVA

INPUT : 415 V, 50 HZ

OUTPUT : 230 V

MAKE : HI - REC

SL.NO. : 01082296

ISOLATOR WITH EARTH SWITCH DEVELOPER ENDMAIN SWITCH:

MAKE : VERSATECK, HYDERABAD

VOLTS : 132 KV

AMPS. : 1250 AMPS

SL.NO. : 673

EARTH SWITCH:

MAKE : VERSATECK, HYDERABAD

VOLTS : 132 KV

AMPS : 1250 AMPS

SL.NO. : 671

R-PHASE CURRENT TRANSFORMER- DEVELOPER END:

CURRENT RATIO : 250 - 125/ 1-1-1 AMPS

FREQUENCY : 50 HZ

HSV : 145 KV

INSULATION CLASS : 275 KV RMS / 650 KV (PEAK)

SHORT TIME CURRENT : 31.5 KA FOR 1 SEC

QUANTITY OF OIL : 105 Ltrs.(APPROXIMATELY)

TOTAL WEIGHT : 290 Kg

TOTAL GREEPAGE DISTANCE : 3625mm (MINIMUM )

STANDARD : IS: 2705 (1992)

MAKE : ITC

SL.NO. : 9058-07

CORE SEC. CONN. PRL CONN. RATIO AMPS BURDEN CLASS RCT/N OHMS VK VOLTS IX  MA

VK /2

1 1S1-1S2

1S1-1S3 P1-P2

P1-P2 125/1

250/1 -

- PS

PS <=2.5

<=5 120(RCT+2) 30 MA

2 2S1-2S2

2S1-2S3 P1-P2

P1-P2 125/1

250/1 20VA

20VA 5P20

5P20 -

- -

- -

-

3 3S1-3S2

3S1-3S3 P1-P2

P1-P2 125/1

250/1 20VA

20VA 0.2

0.2 -

- -

- -

-

SF6 CIRCUIT BREAKER DEVELOPER END:

MAKE : ALSTOM

SL.NO. : 031110

RATED VOLTS : 145 KV

NORMAL CURRENT : 3150 A

FREQUENCY : 50 HZ

LIGHTING IMPULSE WITHSTAND VOLTAGE : 650 KV (PEAK)

FIRST POLE CLEAR FACTOR : 1.5

SHORT TIME WITHSTAND CURRENT : 31.5 KA

DURATION OF SHORT CURRENT : 3 Sec

SHORT CIRCUIT BREAKING CURRENT

SYMMETEICAL : 31.5 KA

ASYMMETRICAL : 37.2 KA

SC MAKING CURRENT : 80 KA(PEAK)

OUT OF PHASE BREAKING CURRENT : 0-0.35-CO-3 MIN - CO

OPERATING SEQUENCE : 6.3 BAR

SF6 GAS PRESSURE AT 20°C, 1013npa : 8.7 Kg

TOTAL MASS OF SF6 GAS : 1300 Kg

TOTAL MASS OF BREAKER :

REF. STD. : IEC – 56

YEAR : 2002

TYPE : FAF1 – 2

TRIP COIL : 110 V, DC

CLOSE COIL : 110 V, DC

MOTOR : 230 V, 50 HZ, AC

HEATER : 230 V,50 HZ, AC

OUTDOOR VACCUM CIRCUIT BREAKER:

MAKE : ALSTOM

TYPE : PCOB – 15

SL.NO. : 13127 / P1

VOLTS : 12 KV

BREAKING CAPACITY : 25 KVA

PHASE : 3

FREQUENCY : 50 HZ

MAKING CAPACITY : 62 KA (PEAK )

SHORT TIME RATING : 25 KA

SHUNT TRIP : 110 V DC

CLOSE : 110 V DC

MOTOR SUPPLY : 230 V AC

MECH. M : SPMX - 500 FORM

MONTH / YEAR : 05 / 02

25MVA POWER TRANSFORMER:

TYPE OF COOLING : ONAN

RATED POWER LV & HV : 25 MVA

RATED VOLTS

HV : 132 KV

LV : 11 KV

RATED LINE AMPS

HV : 109.5 A

LV : 13137 A

NUMBER OF PHASE : 3

MAXIMUM TEMP. RAISE OVER ON AMBIENT OF 50°C

TOP OF OIL : 50°C

AVERAGE WINDING : 55°C

IMPEDANCE VOLTAGE

TAP 1 : 10.94%

TAP 9 : 10.28%

TAP 25 : 9.63%

MAKERS SL.NO. : B – 29622

REF. NO. : T – 6496

TYPE : DOUBLE WOUND

VECTOR GROUP : YNd1

FREQUENCY : 50 HZ

INSULATION

HV SIDE KV : L1650AC275

LV SIDE KV : L175AC28

HVN KV : AC38

CORE AND COIL MASS : 29000 Kg

TANK AND FITTING MASS : 17000 Kg

MASS OF OIL : 14500 Kg

TOTAL MASS : 60500 Kg

TRANSPORT MASS(OIL FILLED) : 48000 Kg

DIAGARM DRG. NO. : A218223

YEAR : 2002

VOLUME OF OIL : 16800 Ltrs

25MVA POWER TRANSFORMER OLTC:

SL.NO : 5002696 / 2001

TYPE : MIII350 / 60 / B / 14273W

RESISTANCE : 4.3 OHMS

MAKE : BHEL

OLTC MOTOR:

VOLTS : 415 V

FREQUENCY : 50 HZ

KW : 1.1

CONTROL SUPPLY : 110 V, 50 HZ

POT : 1000 OHMS

2.5MVA DISTRIBUTION TRANSFORMER-1:

TYPE OF COOLING : ONAN

RATED POWER LV & HV : 2.5 MVA

RATED VOLTS

HV : 11 KV

LV : 0.43 KV

RATED LINE AMPS

HV : 131.2 A

LV : 3333.4 A

NUMBER OF PHASE : 3

MAXIMUM TEMP. RAISE OVER ON AMBIENT OF 50°C

TOP OF OIL : 50°C

AVERAGE WINDING : 55°C

IMPEDANCE VOLTAGE HV / LV : 6.793 %

MAKERS SL.NO. : D – 3262

REF. NO. : TIP – 1001

VECTOR GROUP : DYN11

FREQUENCY : 50 HZ

INSULATION

HV SIDE KV : L175AC28

LV SIDE KV : L1AC3

HVN KV : L1AC3

CORE AND COIL MASS : 3040 Kg

TANK AND FITTING MASS : 2300 Kg

MASS OF OIL : 1140 Kg

TOTAL MASS : 6500 Kg

TRANSPORT MASS(OIL FILLED) : 5200 Kg

DIAGARM DRG. NO. : A328614

VOLUME OF OIL : 1315 Ltrs

YEAR : 2002

WTICT:

RATIO : 3333 / 175 AMPS

BURDEN : 10 VA

ACC.CLASS : 3

NCT:

RATIO : 4000 / 1 A

ACC. CLASS : PS

Vk : > 500 V

IMAG : < 30 MA AT Vk / 2

[email protected] : < 14 OHMS

ESP TRANSFORMER–1:

SL.NO. : 0796 - 01 - 03 - 2001

TYPE : ADOR KARONA

KVA : 49.8

AC INPUT VOLTAGE : 415 V

AC INPUT CURRENT : 120 A

AC OUTPUT VOLTAGE : 70731 V

AC OUTPUT CURRENT : 0.700 A

FREQUENCY : 58 HZ

PHASE : SINGLE PHASE

DC VOLTAGE (PEAK) : 95000 V

DC CURRENT : 500 MA

ESP TRANSFORMER-2:

SL.NO. : 0795 - 01 - 03 – 2001

TYPE : ADOR KARONA

KVA : 49.8

AC INPUT VOLTAGE : 415 V

AC INPUT CURRENT : 120 A

AC OUTPUT VOLTAGE : 70731 V

AC OUTPUT CURRENT : 0.700 A

FREQUENCY : 58 HZ

PHASE : SINGLE PHASE

DC VOLTAGE (PEAK) : 95000 V

DC CURRENT : 500 MA

DISEL GENERATOR:

MAKE : CATTERPILLAR

SL.NO. : 9IRGS00058

RATING : 725 KVA

KW : 580

VOLT : 415

HZ : 50

POWER FACTOR : 0.8

R.P.M. : 1500

AMPS : 1009

DIRECTION OF ROTATION : CW

AMBIENT : 40°C

INSULATION CLASS : H

ENCL. TYPE : IP23

YEAR OF MFG. : 2002

SELF REGULATING BRUSHLESS ALTERNATOR:

TYPE : DSG 62M, NR 62 – 237

VOLT : 415

AMPS : 1009 A

CONST. : B24, B16 / B5

DUTY : S1

CAPACITY : 725 KVA

AMP : 40°C

P.F. : 0.8

ROTOR DIRECTION : CW

R.P.M. : 1500

HZ : 50

PHASE : 3

EXCITATION : 35 V

AMPS : 3.7

RIS DEGREE : N

INS. CLASS : H

ENCL. TYPE : IP23

AVR : LC1 / LC2

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