ENJ431 - Monday 31 March

We can create Zbus by inverting Ybus

• True

• False

We can create Zbus directly using the Zbus building algorithm

• False

• True

For a fault calculation, only the faulted bus has current injection of If''

• True

• False

A four bus system has a fault on bus 1, which answer shows the correct current vector?

• 0

  If''

  0

  0

• 0

  0

  If''

  0

• If''

  0

  0

  0

• 0

  0

  0

  If''

For a four bus system with a fault on bus 3, which answer below shows the correct change in voltage vector?

• \delta V1

  \delta V2

  \delta V3

  \delta V4

• \delta V1

  \delta V2

  -Vf

  \delta V4

• -Vf

  -Vf

  Vf

  -Vf

• \delta V1

  \delta V2

  Vf

  \delta V4