With the help of reactive compensator, it is possible to have

Question

1 Answer

answered Mar 1, 2022 by VinayPoonia (113k points)
selected Mar 1, 2022 by Rohitpatil

Best answer

Correct Answer - Option 4 : Either constant voltage operation or unity p.f. operation

Reactive compensation can be done by either series compensation or shunt compensation.

Series compensation:

It is the method of improving the system voltage by connecting a capacitor or reactor in series with the transmission line.
In series compensation, reactive power is inserted in series with the transmission line for improving the impedance of the system.
The following are the advantages of series capacitive compensation.
- Increase in power transfer capability
- Improvement in system stability
- Load division among parallel line
- Control of voltage

Shunt compensation:

Whenever an inductive load is connected to the transmission line, power factor lags because of lagging load current.
To compensate this, a shunt capacitor is connected which draws current leading the source voltage, thereby the power factor can be improved.
Whenever an capacitive load is connected to the transmission line, power factor leads because of leading load current.
To compensate this, a shunt reactor is connected which draws current lagging the source voltage, thereby the power factor can be improved.

Conclusion:

When reactive compensation is used in series it improves the voltage of the systems.
When reactive compensation is used in shunt it improves the power factor of the system.
So, based on the type of the compensation, it maintain either constant voltage or unity power factor but not both at a time.,