HV Exit Exam • Set 4 Question 8 of 30

A synchronous alternator connected to an infinite bus is said to be overexcited when it operates at a:

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Direct Answer

Option B: Lagging power factor (delivering reactive power to the grid)

Overexcitation in a synchronous generator causes it to generate and export lagging reactive power (kVAr) to the electrical network, operating at a lagging power factor.

All Options

Unity power factor

Lagging power factor (delivering reactive power to the grid) (Correct Answer)

Leading power factor (absorbing reactive power)

Zero power factor leading

Detailed Explanation & Context

Overexcitation in a synchronous generator causes it to generate and export lagging reactive power (kVAr) to the electrical network, operating at a lagging power factor.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • High Voltage Safety Officer & Switchgear Operations (HV).

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