Introduction to IEEE STANDARDS and its different types.pptx
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Prashant Shukla ppt on NTPC Anta
1. A PRESENTATION
Gas Power Plant
From
NTPC Anta (RAJASTHAN)
Submitted To:
EI&CE Depart.
Monday 31 july2015 1
Submitted by:
Prashant Shukla
12EEAEI038
2. TOPICS TO BE COVERED
âĸ Introduction
âĸ Gas turbine
âĸ Start-up And Applications of Gas Turbines
âĸ Applications of Gas Turbine
âĸ Turbine Protections
âĸ Measurements in Power Plant
âĸ Power evacuation
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3. INTRODUCTION NTPC
īNTPC Limited is the largest power generating company of India.
īA public sector company, it was incorporated in the year 1975 to accelerate power
development in the country as a wholly owned company of the Government of India.
īLargest thermal power generating company of India.
īSixth largest thermal power generator in the world.
īSecond most efficient utility in terms of capacity utilizations.
īOne of the nine PSUs to be awarded the status of Navratna.
īProvides power at the cheapest average tariff in the country
īAnta national gas power project is the first combined cycle power project by NTPC .
īThe installed capacity is 419.33 MW with 3 GAS TURBINE units of 88.71 MW each
and 1 STEAM TURBINE Unit combined cycle with a capacity of 153.2 MW.
īFuel is used Natural Gas and Alternate Fuel is used Naphtha.
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4. GAS TURBINE
Gas Turbine is a heat engine
The Process Includes:
īļCompression :
Drawing air into the engine, pressurizing it, and then feeding it to the
combustion chamber.
īļCombustion :
typically made up of a ring of fuel injectors that inject a steady stream of fuel
into combustion chambers where it mixes with the air. The combustion
produces a high temperature, high pressure gas stream that enters and expands
through the turbine section.
īļExpansion:
of the product of combustion in a turbine.
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6. īStart-up of the GT is driven with the help of starting equipment which runs the
generator as a motor with speed increasing from 0 to 600rpm. At this speed a pilot
flame is ignited in the combustion chamber, fuel (gas/naphtha) enters and
combustion takes place.
īThe speed increases further both with the help of generator motoring and the
combustion of fuel up to about 2000 rpm. At this speed starting equipment is
switched off and only the generator is made ready for synchronization with the
grid. After synchronizations, the turbine load increases up to base load with more
and more fuel entering the combustion chamber.
Start-up of the GasTurbine
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7. Applications of GasTurbine
Conventional applications are:
ī Simple cycle operation.
ī Combined cycle operation.
Electric utility companies use gas turbine predominantly in simple cycle and
combined cycle applications.
Combined cycle operation is much efficient than open cycle operation.
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8. Simple Cycle Operation
īA simple cycle operation turbine(SCCT) is a type of gas turbine most frequently
used in the power generation, aviation (jet engine), and oil and gas industry
(electricity generation and mechanical drives).
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9. Combined Cycle Power Plant
īThe Combustion Turbine
Natural gas is mixed with air and burned in the combustion chamber to create the high
pressure gasses needed to spin a turbine. This part of the plant is a single cycle,
combustion turbine. These are sometimes called CTs. CTs are normally designed to
meet peak loads.
A combined cycle power plant is a dual cycle plant. The "2nd" part of the combined
cycle is a heat recovery unit. It takes advantage of the energy in the exhaust gasses to
create steam. The steam spins a steam turbine to generate additional electricity. The
combined cycle plants are normally designed to meet base and intermediate loads.
īThe Combined Cycle Plant
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10. The turbine protection system can be actuated by any of the following trip
systems :
-- Hydraulic trip system
-- Electrical trip system
īLub oil pressure low
īBearing Tempearature high
īExhaust pressure high
īOverspeed trip
īExhaust temp high
īFire protection
īGenerator trip leading to turbine trip
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15. DIFFERENTIAL PRESSURE FLOW METERS
The basic operating principle :
The pressure drop across the meter is proportional to the square
of the flow rate.
The flow rate is obtained by measuring the pressure differential
and extracting the square root.
īORIFICE
īVENTURI
īNOZZLE
īPITOT TUBE
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16. ELECTROMAGNETIC FLOW METER
When a liquid conductor moves in a pipe having a diameter (D) and travels with an
average velocity (V) through a magnetic field of B intensity, it will induce a
voltage (E) according to the relationship:
E = C B D V
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17. TEMPERATURE MEASUREMENT
īTHERMOMETER
īRESISTANCE TEMPERATURE DETECTOR
ī THERMOCOUPLES
īTEMPERATURE GAUGE
Temperature cannot be measured directly but must be measured by
observing the effect that temperature variation causes on measuring
devices
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18. RESISTANCE THERMOMETER
The resistance of a conductor changes when its temperature is changed. This property is
utilised to measure the temperature.
The change in resistance of the material per deg C should be as large as possible.
The resistance should have a continuous and stable relation with temperature.
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19. THERMOCOUPLES
ī It is based on SEEBACK effect which says that when heat is applied to a junction of
two dissimilar metals an EMF is generated which can be measured at the other
junction . By this way temperature is measured.
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20. LEVEL MEASUREMENT
ī Differential Pressure transmitter
Level is measured through Electronic DP transmitter
ī Ultrasonic level transmitter
Level is measured by ultrasonic transmitter mounted on the top of the
tank
ī Guided wave radar type level transmitter
Generally used for low pressure application
ī Hydrastep
Most commonly used for Boiler drum measurement
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21. ULTRASONIC LEVEL TRANSMITTER
ī Ultrasonic level instruments operate on the principle of using sound waves to
determine fluid level. The frequency range for ultrasonic methods is ~20â200 kHz.
ī A top-of-tank mounted transducer directs waves downward in bursts onto the surface
of the material whose level is to be measured.
ī Echoes of these waves return to the transducer, which performs calculations to
convert the distance of wave travel into a measure of level in the tank. A piezoelectric
crystal inside the transducer converts electrical pulses into sound energy that travels
in the form of a wave at the established frequency and at a constant speed in a given
medium.
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22. SWAS
īWater Treatment Plant.
īŧMeasurements of Direct & After-cation Condy.,
īŧMeasurement of Sodium, Reactive Silica.
īŧMeasurement of pH.
for different stages of the plant.
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23. Power Evacuation From NTPC ANTA
There are total six 220 kv transmission lines for evacuation of power generated atAnta.
Two lines for Bhilwara,
Two lines for Jaipur and
one line for Kota and
one line for Rawatbhata power plant
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24. I have studied about the power plant, especially in ANTA. Studied
about gas power plant, especially natural gas could be used for
power generation in gas power plant. It is very economical but less
efficient. Mainly methane (CH4) is used as fuel. It is very profitable in
case of pollution. It is very less polluted.
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CONCLUSION