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GATE 2014 EE (EE2) – Question 26

Power Systems · Series and shunt compensation, Electric field distribution and insulators, Distribution systems · 1 mark · Multiple choice

Shunt reactors in high-voltage transmission systems are used to ______.

  1. limit line short-circuit current
  2. compensate series line reactance under heavy load
  3. limit receiving-end overvoltage under light load
  4. compensate line voltage drop under heavy load

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Show answer and explanation

Correct answer: (C) limit receiving-end overvoltage under light load

Explanation

A lightly loaded long line produces capacitive charging reactive power,which can raise receiving-end voltage through the Ferranti effect. A shunt reactor absorbs inductive reactive power and limits this overvoltage. Thus **C** is correct; series compensation and fault-current limitation are different applications.