GETCO Exam Paper (22-07-2015)
The Y bus matrix is a sparse matrix because …

no of lines are less
bus incidence matrix is a sparse matrix
Y primitive is a sparse matrix
lines are connected to less no. of buses

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GETCO Exam Paper (22-07-2015)
Which of the following is a reason to decouple AVR and LFC loops when there is a shortage of reactive power?

deference of error is the main reason
angle of the voltage is not considered
Change in voltage magnitude marginally affects real power
AVR loop response is slower than LFC loop

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