SOLUTION

Synchronous motors can be used for power factor correction.

Detailed Explanation

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 a leading current.

A 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.