Synchronous Phase Modifier and Load Angle

Synchronous phase modifier is a device used to control the load angle of a synchronous machine. The load angle is defined as the angle between the stator voltage and the rotor voltage of a synchronous machine. It is an important parameter that determines the power factor and the stability of the machine.

Load Angle of Synchronous Machine

The load angle of a synchronous machine depends on the mechanical torque applied to the rotor and the electrical power consumed by the load. If the mechanical torque applied to the rotor is greater than the electrical power consumed by the load, the load angle increases, and the machine operates in the generating mode. If the mechanical torque is less than the electrical power consumed by the load, the load angle decreases, and the machine operates in the motoring mode.

Role of Synchronous Phase Modifier

The synchronous phase modifier is a device that modifies the phase angle of the rotor voltage in relation to the stator voltage. By changing the phase angle, the load angle of the machine can be controlled. The synchronous phase modifier can be used to increase or decrease the load angle of the machine.

In general, the synchronous phase modifier is used to increase the load angle of the machine. This is because, in the generating mode, the machine can deliver more power to the load when the load angle is increased. However, if the load angle is increased beyond a certain limit, the stability of the system may be affected.

Conclusion

In conclusion, the load angle of a synchronous machine is an important parameter that determines the power factor and the stability of the machine. The synchronous phase modifier is a device that can be used to control the load angle of the machine. In general, the synchronous phase modifier is used to increase the load angle of the machine. Option 'A' (00) is the correct answer as it represents the initial load angle of the machine.