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Which of the following motors can be used for power factor correction?
1. DC series motor
2. Stepper motor
3. Synchronous motor
4. Induction motor

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Correct Answer - Option 3 : Synchronous motor

The power-transfer capability of EHV transmission lines can be increased by maintaining the loaded voltage within specified limits.

The following methods are used for maintaining the voltage within limits:

  • Shunt capacitor bank
  • Shunt reactors
  • Synchronous condensers
  • Static VAR compensators at heavy loads
  • Series compensation

 

A synchronous condenser is not a static compensation. A synchronous condenser is a synchronous motor running at no load and taking leading current.

synchronous condenser is an overexcited synchronous motor, which draws leading currents from the system and hence compensates for lagging vars. It is used as a reactive power compensator in some systems for power factor correction purposes.

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