Power System Performance Analysis Quiz
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Questions and Answers

What is the main target of a power-flow study in a power system?

  • Determining Voltages, Currents, and Real and Reactive Power Flows (correct)
  • Determining line resistance and reactance
  • Analyzing transient stability
  • Calculating short-circuit currents

What is the purpose of creating a bus admittance matrix Ybus for the power system in a power-flow study?

  • To calculate the line impedances
  • To estimate the line current distribution
  • To determine the type of loads connected to each bus
  • To find the power-flow solution via iteration (correct)

What is the role of iterating to find conditions that satisfy the system’s load flow equations in a power-flow study?

  • To calculate the short-circuit current at each bus
  • To determine the real power losses in the system
  • To estimate the line resistance values
  • To validate the initial assumptions about bus voltages (correct)

Why is it mentioned that the updated voltage will not be correct in a power-flow study?

<p>Because it depends on estimates and iterative calculations (C)</p> Signup and view all the answers

What is the significance of estimating the line currents in a power-flow study?

<p>To ensure that the current-carrying capacity of lines is not exceeded (D)</p> Signup and view all the answers

In a power-flow study, what is the purpose of creating a bus admittance matrix Ybus?

<p>To estimate the real and reactive power flows in the system (B)</p> Signup and view all the answers

Why is it important to iterate to find conditions that satisfy the system’s load flow equations in a power-flow study?

<p>To update the voltage estimate for each bus based on estimates for the voltages and power flows at every other bus (B)</p> Signup and view all the answers

What is the main target of a power-flow study in a power system?

<p>To estimate the real and reactive power flows in the system (B)</p> Signup and view all the answers

Why does the updated voltage in a power-flow study usually be closer to the answer than the original guess?

<p>As a result of iterating to find conditions that satisfy the load flow equations (A)</p> Signup and view all the answers

What is the significance of estimating the line currents in a power-flow study?

<p>To determine how much current flows through each line in the system (A)</p> Signup and view all the answers

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