Power System Design and Transmission
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Questions and Answers

What is the main advantage of interconnecting electrical supply systems?

  • Pooling of generation capacity (correct)
  • Reducing the transmission line voltage
  • Increasing the power generation capacity
  • Possessing excess generating capacity
  • What is the main reason for reinforcement need in a transmission system?

  • To reduce the power generation capacity
  • To meet the increase in load (correct)
  • To operate the system at an optimal level
  • To increase the transmission line voltage
  • Which of the following voltage levels has the lowest failure rate for underground cables?

  • 5-11 kV
  • 33 kV
  • 66 kV (correct)
  • 11-20 kV
  • What is the main advantage of using high voltage transmission lines?

    <p>Conveying electrical energy over long distances efficiently</p> Signup and view all the answers

    What is the primary function of a high voltage transmission system?

    <p>To convey electrical energy from generating stations to the distribution system</p> Signup and view all the answers

    What is the purpose of surge impedance loading in a transmission system?

    <p>To convey electrical energy efficiently</p> Signup and view all the answers

    What is the primary function of switching and protection equipment in a power system?

    <p>To provide safety</p> Signup and view all the answers

    What is the primary function of transformers in a power system?

    <p>To change voltage and current levels</p> Signup and view all the answers

    What is the typical voltage range of distribution feeders?

    <p>3.3-33 kV</p> Signup and view all the answers

    What is the main purpose of a distribution system in an electric power system?

    <p>To deliver electrical energy from transmission substations to customers</p> Signup and view all the answers

    What determines the capacity of power lines?

    <p>The metal cross-section</p> Signup and view all the answers

    What is the primary purpose of a transmission system in an electric power system?

    <p>To transport large amounts of power over long distances</p> Signup and view all the answers

    What happens to voltage drop and power losses in power lines as the load increases?

    <p>They increase</p> Signup and view all the answers

    What is the typical range of capacity for distribution feeders?

    <p>2-35 MW</p> Signup and view all the answers

    What is the typical voltage range of transmission lines in European countries?

    <p>300, 400, 500, and 750 kV</p> Signup and view all the answers

    What is the purpose of a step-up transformer in a power transmission system?

    <p>To increase the voltage level for transmission</p> Signup and view all the answers

    What is the primary factor considered when determining the power generation capacity of a power station?

    <p>Capital cost, operation, and maintenance costs</p> Signup and view all the answers

    What are the main environmental issues associated with power generation?

    <p>Radioactive waste, ash disposal, and cooling water supply</p> Signup and view all the answers

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