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Electricity In Our Lives (student preso)
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Electricity In Our Lives (student preso)

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student presentation …

student presentation
general physics
28 nov 2009

Published in: Education, Business, Technology

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Transcript

  • 1. Electricity in our lives
    Pawat
    Sahapat
    Pat
    Sirirat
  • 2. How electricity reaches our homes?
  • 3. 1.1 Power Plant
    There are many types of power station. They are classify into two main groups: fuel and prime mover.
    Fuel: nuclear, fossil fuel, geothermal and solar thermal
    Prime mover: Steam turbine, wind turbine and gas turbine
    In power station, fuel is often used to produce heat energy which turn the turbine. Thus, generating electricity.
  • 4. 1.2 High-Voltage Switchyard
    • Voltage of the electrical supply is raised.
    • 5. Higher Voltage, lower current. With high current, more heat is produce.
    • 6. Lower current, less energy is loss through heat
    • 7. Consists of step-up transformers, circuit brakers, disconnector, current and voltage transformers.
  • 1.25 Transmission Lines
    • Transmission lines are path for electric power transmission.
    • 8. Low resistance metal and larger cross-sectional area of wire is used to reduce resistance. Thus, reduce power loss
    • 9. Limitation is the high cost
  • 1.3 Distribution Station
    • Step-down transformer
    • 10. Decrease voltage, increase current
    • 11. Make it usable for consumer
    • 12. Distribute to domestic and commercial
    If we don’t convert
  • 13. 1.4 Residential Customer
    • Electricity that enter our homes is of alternating current (A/C)
    • 14. Electrical appliances convert A/C to direct current (D/C) using transformers
    Ready to use!
  • 15. References
    http://www.ehvpower.com/index.php?option=com_content&view=article&id=37&Itemid=16
    http://pepei.pennnet.com/display_article/189159/6/ARTCL/none/none/1/Switchyard-Transformers-Overlooked-in-Power-Quality-Equation/
    http://en.wikipedia.org/wiki/Power_plant
    http://en.wikipedia.org/wiki/Transformer
  • 16. Task
    Patt – researcher and pp.
    Tar-researcher and pp.
    Sirirat-researcher and pp.
    Sonny-presenter.