Steam power plants generate electricity through the Rankine cycle. Coal is combusted in boilers to produce high-pressure steam, which is then expanded in a steam turbine. This drives an electrical generator, converting the mechanical energy of the turbine into electrical energy. The steam is then condensed in a condenser and returned to the boilers to repeat the cycle. Steam power plants are suitable where coal and water resources are abundant, as they can generate large amounts of electricity. Key equipment includes boilers, turbines, generators, and condensers. The document directs the reader to further sections in a textbook by V.K. Mehta for more details on steam power plant arrangements, efficiency considerations, major equipment, and site selection factors

1. Power Station, Switchgear & Protection
ECE-4109
Fariya Tabassum
Assistant Professor, Dept. of Electrical & Computer Engineering
Rajshahi University of Engineering & Technology, Rajshahi-6204 1

2. 2
“Read! In the name of thy Lord
and Cherisher, Who created-”.
[Sura Al-’Alaq ]

3. 3
Study Materials
❑ Principle of Power System
V.K Mehta
❑ Power System switchgear and Protection
Bhuvanes A.Oza
❑ Switchgear and Protection
Sunil S. Rao

4. 4
Power Plants
It is the power producing unit.
Basis of working
A generating station essentially employs a prime mover coupled to an alternator for
the production of electric power. The prime mover (e.g., steam turbine, water turbine
etc.) converts energy from some other form into mechanical energy. The
alternator converts mechanical energy of the prime mover into electrical energy.
The electrical energy produced by the generating station is transmitted and distributed with
the help of conductors to various consumers. It may be noted that apart from prime mover-
alternator combination, a modern generating station employs several auxiliary equipment
and instruments to ensure cheap, reliable and continuous service.

5. 5
Power Plants
Types
▪ Steam/ Thermal
▪ Hydroelectric
▪ Diesel
▪ Gas
▪ Combined cycle
▪ Nuclear

6. 6
Steam Power Plants
A generating station which converts heat energy of coal combustion into electrical
energy is known as a steam power station.
A steam power station basically works on the Rankine cycle. Steam is produced in the
boiler by utilizing the heat of coal combustion. The steam is then expanded in the prime
mover (i.e., steam turbine) and is condensed in a condenser to be fed into the boiler again.
The steam turbine drives the alternator which converts mechanical energy of the turbine
into electrical energy. This type of power station is suitable where coal and water are
available in abundance and a large amount of electric power is to be generated.

7. 7
Steam Power Plants
Advantages and Disadvantages
For preparing your answer you have to go through the article 2.2 of the
book written by “V. k. Mehta” [Edition-4th

8. 8
Steam Power Plants
Schematic Arrangements

9. 9
Steam Power Plants
Schematic Arrangements
For preparing your answer you have to go through the article 2.3 of the
book written by “V. k. Mehta” [Edition-4th

10. 10
Steam Power Plants
Proper Choice of Site
For preparing your answer you have to go through the article 2.4 of the
book written by “V. k. Mehta” [Edition-4th

11. 11
Steam Power Plants
Efficiency
For preparing your answer you have to go through the article 2.5 of the
book written by “V. k. Mehta” [Edition-4th

12. 12
Steam Power Plants
Major Equipment
For preparing your answer you have to go through the article 2.6 of the
book written by “V. k. Mehta” [Edition-4th