What are positive, negative & zero sequence impedance?

Positive Sequence Impedance
The impedance offered by the system to the flow of positive sequence current is called positive sequence impedance.

Negative Sequence Impedance
The impedance offered by the system to the flow of negative sequence current is called negative sequence impedance.

Zero Sequence Impedance
The impedance offered by the system to the flow of zero sequence current is known as zero sequence impedance.

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Interview Questions
MCQ or objective

Positive sequence component :- It specifies that the current is flowing through source to load.

Negative sequence component:- It specifies that current is flowing from load to source.

Zero sequence component :- It specifies that current is flowing from source to ground.

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