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Question

For a fault in a power system, the term critical clearing time is related to 

A.

Reactive power limit 

B.

Transient stability limit 

C.

Short circuit current limit 

D.

Steady state stability limit

Answer ( Option B)

Transient stability limit 

Solution

For a fault in a power system, the term critical clearing time is related to transient stability limit. Critical clearing time and angle are computed from equal area criterion, which is used in transient stability study.

Hence, the correct option is (B).

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