This ppt is for electrical engineering student focusing on electrical machinery of power plant .made by neeraj kumar vishwakarma

1. NITTE MEENAKSHI INSTITUTE OF TECHNOLOGY ,BANGALORE
(an autonomous institution)
“ STUDY OF ELECTRICAL MACHINERY AND EQUIPMENT
UTILISED IN THERMAL POWER GENERATION”
INTERNAL GUIDE- EXTERNAL GUIDE-
Mr. C.H.V RAMESH Mr. U V SRIVASTAV
NMIT,BANGALORE AGM(EMD),NTPC
PRESENTED BY –
NEERAJ KUMAR VISHWAKARMA
USN- 1NT16EE029

2. RIHAND THERMAL POWER PLANT
• The foundation of Rihand super thermal power project was laid on
9th February 1982.
• It’s one of the NTPC’s best power plants, in the northern region
constructed by Northern Engineering Industries stage I, Bharat
Heavy Electricals Limited Stage II and Bharat Heavy Electricals
stage III Rihand along with Singrauli STPS and Vindhyachal STPS
completes the power triangle.
• It’s situated in Bijpur in the industrial belt of Sonebhadra, Uttar
Pradesh.
• Commencement of work 09/02/1983.

3. OVERVIEW OF POWER PLANT
• UNIT TRANSFORMER/SWITCHYARD (4)
• GENERATOR(5)
• ESP(25)

4. INTRODUCTION OF ELECTRICAL
MACHINERY AND E.M.D
• Turbo Generator
• Switchgear/transformer
• Motor drives
• Switchyard
• Electrostatic precipitator

5. TURBO GENERATOR
• Combination of turbine and generator
• Works on principal of electromagnetic induction
• Specification- 5 MW,5.3 MVA,3-PHASE,Y-Y connection ,0.85lag pf

6. EXCITER
• The generator while producing electricity also has to produce this at a constant
voltage for the electrical system to work properly. Controlling the magnetic field
controls the voltage output of the generator.
• The rotor is a rotating electromagnet that requires a DC ( Direct Current) electric
power source to excite the magnetic field. This power comes from an exciter.

7. TRANSFORMER
• Transformer function is based on the principle that electrical energy is transferred
efficiently by magnetic induction from one circuit to another.
• Types of transformer in generation-
generator transformer
unit auxiliary transformer
station transformer

8. SPECIFICATION OF DIFFERENT TRANSFORMER
GENERATOR
TRANSFORMER(GT)
UNIT AUXILARY
TRANSFORMER(UAT)
STATION TRANSFORMER(ST)
• type : OFAF
• lv side rating: 200 MVA
• hv side rating: 200 MVA
• lv voltage: 21 KV
• hv voltage: 420/sqrt3 KV
• lv current: 9523 Amps
• hv current: 824.79 Amps
• connection: YNd11
• oil temp: 35 deg at 200
MVA
• winding tem: 40 deg at
200 MVA
• type : ONAN
• lv side rating: 16 MVA
• hv side rating: 16 MVA
• lv voltage: 11 KV
• hv voltage: 3.5 KV
• lv current: 2642.44 Amps
• hv current: 840.78 Amps
• connection: DYn1
• oil temp: 50 deg at 16
MVA
• winding tem: 50 deg at
16 MVA
• type : ONAN/OFAF
• lv side rating: 48 MVA/80 MVA
• hv side rating: 24 MVA/24
MVA/40 MVA
• hv voltage: 132 KV
• lv1 voltage: 11.5 KV
• lv2 voltage: 11.5 KV
• lv1 current: 2008.2 Amps
• lv2 current: 2008.2 Amps
• hv current: 349.9 Amps
• weight of windingl: 53 ton
• weight of oil: 35 ton

9. SWITCHGEAR
• a sequence of power is design according to requirement of electrical
equipment ,such sequence is called switchgear.
• combination of electrical disconnects, fuses and/or circuit
breakers used to isolate electrical equipment.
• It protection to the equipment's

10. SWITCHGEAR
LOW TENSION SWITCHGEAR
• RELAY
• CONTRACTOR
• ISOLATOR
• CIRCUIT BREAKER
HIGH TENSION SWITCHGEAR
• OIL SWITCHES
• ISOLATOR
• CIRCUIT BREAKER
• LIGHTENING
ARRESTER
• CURRENT
TRANSFORMER
• POTENTIAL
TRANSFORMER

11. MOTOR DRIVES
• Anywhere you go we will find a group of motor performing different task in power
plant
• There are various types and sizes of motors used in power station
• Types of motor-
a) High tension motor b) low tension motor

12. HIGH TENSION MOTOR
NAME MAKER NO.
INSTALLED
KW RATING LOAD
CURRENT
11KV
BF PUMP NEI 6 9600 593
ID FAN NEI 4 3309 209
PA FAN NEI 6 3418 217
CW PUMP NEI 6 2885 187
3.3 KV
COAL MILLS NEI 16 480 120
COAL
CRUSHER
NEI 4 560 117
FD FAN NEI 4 1535 308
CONVEYER NEI 4 358 75

13. SWITCHYARD AND EQUIPMENTS
• A Switchyard or Substation, consisting of large breakers and towers, is usually
located in an area close to the plant.
• It is required for sending and receiving power from plants through transmission
line.

14. SUB-STATION EQUIPMENTS
• Transformers
• Lighting arrestors
• Isolators
• Circuit breakers
• Current transformers
• Potential transformers
• Earthing switch
• Bus bars & clamp fittings
• Control relay panel
• Bays

15. Electro Static Precipitator
• To remove fly ash from the flue gases electrostatic
precipitators are used.
• They have collection efficiency over 99.5%
• The efficiency depends on various parameters such as velocity
of flow, quantity of gas, resistivity of ash, voltage of fields,
temperature etc.
• The ash is mixed with water at bottom to make slurry and the
slurry is transported to backyard of power plant
• The slurry which when get dry become ash particles is useful
for cement factory as raw material .

17. CONCLUSION
• It was great honor for me to get internship in a maharatna company
such as NTPC.
• There was a lot help in understanding the basics of this giant thermal
power project.
• I was able to realize the theoretical knowledge that I posses and see
their application
• Thus, I conclude that definitely due this internship training I gained
a lot of knowledge of discipline and that a lot thrust of curiosity was
trenched but a lot still to learn and realize.