What are the different methods for voltage control? Briefly explain them?
Answers
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Methods Of Voltage Control In Power System
Using excitation control or voltage regulators at generating stations
By using tap changing transformers
Using induction regulators
By using shunt reactors
By using shunt capacitors
Using synchronous condensers
some of the voltage control methods in power system are discussed.
Excitation control and voltage regulators at the generating stations:
Use of tap changing transformers at sending end and receiving end of the transmission lines
Switching in shunt reactors during low loads or while energizing long EHV lines
Switching in shunt capacitors during high loads or low power factor loads
use of series capacitors in long EHV transmission lines and distribution lines in case of load fluctuations
Use of tap changing transformers in industries, substations, distribution substations
use of static shunt compensation having shunt capacitors and thyristorized control for step-less control of reactive power
Use of synchronous condensers in receiving end substations for reactive power compensation
All the above methods are suitably applied at different parts of the power system to maintain the voltage levels within the limits